The Experts below are selected from a list of 312 Experts worldwide ranked by ideXlab platform

Sylvain Grangeon - One of the best experts on this subject based on the ideXlab platform.

  • Retention of arsenic, chromium and boron on an outcropping clay-rich Rock Formation (the Tégulines Clay, eastern France)
    2019
    Co-Authors: Mathieu Debure, Christophe Tournassat, Catherine Lerouge, Benoît Made, Jean-charles Robinet, Ana Fernández, Sylvain Grangeon
    Abstract:

    In many countries, environmental impact of toxic chemicals has to be considered for the implementation of industrial facilities. The assessment of the toxic chemical environmental impact for a given facility requires evaluating the mobility of the various toxic chemicals potentially involved in the industrial activity in its surrounding environment. Numerical evaluations of the migration of the identified toxic elements from the industrial facilities toward the biosphere necessitate a good parametrization of their retention behavior. Outcropping clay-rich Formations are considered as a potential host for a radioactive waste repository in many countries. Radioactive waste can contain toxic chemicals such as As, Cr and B leading to evaluate their migration in such clay systems. Sub-surface clay-rich Rocks are notably characterized by redox transitions, which can influence the migration of many contaminants 1. The retention behavior of arsenic (As), chromium (Cr) and boron (B), was investigated for an outcropping clay-Rock Formation, the Albian Tégulines Clay (France, Aube) currently studied as potential a host-Rock for long-live low activity level (LL-LL) radioactive waste At the vicinity of the surface, Tégulines Clay is affected by weathering processes leading to contrasted geochemical conditions with depth. One of the main features of the weathering is the occurrence of a redox transition zone near the surface. Batch sorption experiments of As(V), As(III), Cr(VI) and B were performed on samples collected at two depths representative either of oxidized or reduced mineral assemblages. Batch sorption experiments highlighted a distinct behavior of As, Cr and B oxyanions. The in-situ redox state of the Tégulines Clay samples has a significant effect on Cr retention (Cr(VI) heterogeneous reduction reactions followed by Cr(III) precipitation). On the contrary, As(V) reduction into As(III) is moderate and its retention slightly affected by the in-situ redox state of the Tégulines Clay. As(V) retention is higher than As(III) retention. Boron retention is strongly influenced by its natural abundance in the Tégulines clay samples and the distribution coefficient of B (Kd) is expected to be very low for in-situ conditions due to the significant amount of natural B in the pore water 2. The comparison of the retention properties of two Tégulines Clay samples towards three oxyanions with contrasted chemical properties highlighted the roles of clay mineralogy, natural abundance, and reducing capacity of the investigated materials. References: 1Lerouge, C. et al., 2018. Geofluids, 20. 2Debure, M. et al., 2018. Science of The Total Environment, 642, 216-229.

  • retention of arsenic chromium and boron on an outcropping clay rich Rock Formation the tegulines clay eastern france
    Euroclay, 2019
    Co-Authors: Mathieu Debure, Christophe Tournassat, Catherine Lerouge, Benoît Made, Jean-charles Robinet, Ana María Fernández, Sylvain Grangeon
    Abstract:

    In many countries, environmental impact of toxic chemicals has to be considered for the implementation of industrial facilities. The assessment of the toxic chemical environmental impact for a given facility requires evaluating the mobility of the various toxic chemicals potentially involved in the industrial activity in its surrounding environment. Numerical evaluations of the migration of the identified toxic elements from the industrial facilities toward the biosphere necessitate a good parametrization of their retention behavior. Outcropping clay-rich Formations are considered as a potential host for a radioactive waste repository in many countries. Radioactive waste can contain toxic chemicals such as As, Cr and B leading to evaluate their migration in such clay systems. Sub-surface clay-rich Rocks are notably characterized by redox transitions, which can influence the migration of many contaminants 1. The retention behavior of arsenic (As), chromium (Cr) and boron (B), was investigated for an outcropping clay-Rock Formation, the Albian Tegulines Clay (France, Aube) currently studied as potential a host-Rock for long-live low activity level (LL-LL) radioactive waste At the vicinity of the surface, Tegulines Clay is affected by weathering processes leading to contrasted geochemical conditions with depth. One of the main features of the weathering is the occurrence of a redox transition zone near the surface. Batch sorption experiments of As(V), As(III), Cr(VI) and B were performed on samples collected at two depths representative either of oxidized or reduced mineral assemblages. Batch sorption experiments highlighted a distinct behavior of As, Cr and B oxyanions. The in-situ redox state of the Tegulines Clay samples has a significant effect on Cr retention (Cr(VI) heterogeneous reduction reactions followed by Cr(III) precipitation). On the contrary, As(V) reduction into As(III) is moderate and its retention slightly affected by the in-situ redox state of the Tegulines Clay. As(V) retention is higher than As(III) retention. Boron retention is strongly influenced by its natural abundance in the Tegulines clay samples and the distribution coefficient of B (Kd) is expected to be very low for in-situ conditions due to the significant amount of natural B in the pore water 2. The comparison of the retention properties of two Tegulines Clay samples towards three oxyanions with contrasted chemical properties highlighted the roles of clay mineralogy, natural abundance, and reducing capacity of the investigated materials. References: 1Lerouge, C. et al., 2018. Geofluids, 20. 2Debure, M. et al., 2018. Science of The Total Environment, 642, 216-229.

  • retention of arsenic chromium and boron on an outcropping clay rich Rock Formation the tegulines clay eastern france
    Science of The Total Environment, 2018
    Co-Authors: Mathieu Debure, Christophe Tournassat, Catherine Lerouge, Benoît Made, Jean-charles Robinet, Ana María Fernández, Sylvain Grangeon
    Abstract:

    The retention behavior of three toxic chemicals, As, Cr and B, was investigated for an outcropping Rock Formation, the Albian Tegulines Clay (France, Aube). At a shallow depth, Tegulines Clay is affected by weathering processes leading to contrasted geochemical conditions with depth. One of the main features of the weathering is the occurrence of a redox transition zone near the surface. Batch sorption experiments of As(V), As(III), Cr(VI) and B were performed on samples collected at two depths representative either of oxidized or reduced mineral assemblages. Batch sorption experiments highlighted a distinct behavior between As, Cr and B oxyanions. Cr(VI) retention behavior was dominated by redox phenomena, notably its reduction to Cr(III). The in-situ redox state of the Tegulines Clay samples has a significant effect on Cr retention. On the contrary, As(V) reduction into As(III) is moderate and its retention slightly affected by the in-situ redox state of the Tegulines Clay. As(V) retention is higher than As(III) retention in agreement with literature data. B retention is strongly related to its natural abundance in the Tegulines clay samples. Distribution coefficient of B corrected from its natural content is expected to be very low for in-situ conditions. Finally, the retention and mobility of these oxyanions were affected by clay mineralogy, natural abundance, and reducing capacity of the Tegulines Clay.

  • Retention of arsenic, chromium and boron on an outcropping clay-rich Rock Formation (the Tégulines Clay, eastern France)
    Science of the Total Environment, 2018
    Co-Authors: Mathieu Debure, Christophe Tournassat, Catherine Lerouge, Benoît Made, Jean-charles Robinet, Ana María Fernández, Sylvain Grangeon
    Abstract:

    The retention behavior of three toxic chemicals, As, Cr and B, was investigated for an outcropping Rock Formation, the Albian Tégulines Clay (France, Aube). At a shallow depth, Tégulines Clay is affected by weathering processes leading to contrasted geochemical conditions with depth. One of the main features of the weathering is the occurrence of a redox transition zone near the surface. Batch sorption experiments of As(V), As(III), Cr(VI) and B were performed on samples collected at two depths representative either of oxidized or reduced mineral assemblages. Batch sorption experiments highlighted a distinct behavior between As, Cr and B oxyanions. Cr(VI) retention behavior was dominated by redox phenomena, notably its reduction to Cr(III). The in-situ redox state of the Tégulines Clay samples has a significant effect on Cr retention. On the contrary, As(V) reduction into As(III) is moderate and its retention slightly affected by the in-situ redox state of the Tégulines Clay. As(V) retention is higher than As(III) retention in agreement with literature data. B retention is strongly related to its natural abundance in the Tégulines clay samples. Distribution coefficient of B corrected from its natural content is expected to be very low for in-situ conditions. Finally, the retention and mobility of these oxyanions were affected by clay mineralogy, natural abundance, and reducing capacity of the Tegulines Clay.

Mathieu Debure - One of the best experts on this subject based on the ideXlab platform.

  • Retention of arsenic, chromium and boron on an outcropping clay-rich Rock Formation (the Tégulines Clay, eastern France)
    2019
    Co-Authors: Mathieu Debure, Christophe Tournassat, Catherine Lerouge, Benoît Made, Jean-charles Robinet, Ana Fernández, Sylvain Grangeon
    Abstract:

    In many countries, environmental impact of toxic chemicals has to be considered for the implementation of industrial facilities. The assessment of the toxic chemical environmental impact for a given facility requires evaluating the mobility of the various toxic chemicals potentially involved in the industrial activity in its surrounding environment. Numerical evaluations of the migration of the identified toxic elements from the industrial facilities toward the biosphere necessitate a good parametrization of their retention behavior. Outcropping clay-rich Formations are considered as a potential host for a radioactive waste repository in many countries. Radioactive waste can contain toxic chemicals such as As, Cr and B leading to evaluate their migration in such clay systems. Sub-surface clay-rich Rocks are notably characterized by redox transitions, which can influence the migration of many contaminants 1. The retention behavior of arsenic (As), chromium (Cr) and boron (B), was investigated for an outcropping clay-Rock Formation, the Albian Tégulines Clay (France, Aube) currently studied as potential a host-Rock for long-live low activity level (LL-LL) radioactive waste At the vicinity of the surface, Tégulines Clay is affected by weathering processes leading to contrasted geochemical conditions with depth. One of the main features of the weathering is the occurrence of a redox transition zone near the surface. Batch sorption experiments of As(V), As(III), Cr(VI) and B were performed on samples collected at two depths representative either of oxidized or reduced mineral assemblages. Batch sorption experiments highlighted a distinct behavior of As, Cr and B oxyanions. The in-situ redox state of the Tégulines Clay samples has a significant effect on Cr retention (Cr(VI) heterogeneous reduction reactions followed by Cr(III) precipitation). On the contrary, As(V) reduction into As(III) is moderate and its retention slightly affected by the in-situ redox state of the Tégulines Clay. As(V) retention is higher than As(III) retention. Boron retention is strongly influenced by its natural abundance in the Tégulines clay samples and the distribution coefficient of B (Kd) is expected to be very low for in-situ conditions due to the significant amount of natural B in the pore water 2. The comparison of the retention properties of two Tégulines Clay samples towards three oxyanions with contrasted chemical properties highlighted the roles of clay mineralogy, natural abundance, and reducing capacity of the investigated materials. References: 1Lerouge, C. et al., 2018. Geofluids, 20. 2Debure, M. et al., 2018. Science of The Total Environment, 642, 216-229.

  • retention of arsenic chromium and boron on an outcropping clay rich Rock Formation the tegulines clay eastern france
    Euroclay, 2019
    Co-Authors: Mathieu Debure, Christophe Tournassat, Catherine Lerouge, Benoît Made, Jean-charles Robinet, Ana María Fernández, Sylvain Grangeon
    Abstract:

    In many countries, environmental impact of toxic chemicals has to be considered for the implementation of industrial facilities. The assessment of the toxic chemical environmental impact for a given facility requires evaluating the mobility of the various toxic chemicals potentially involved in the industrial activity in its surrounding environment. Numerical evaluations of the migration of the identified toxic elements from the industrial facilities toward the biosphere necessitate a good parametrization of their retention behavior. Outcropping clay-rich Formations are considered as a potential host for a radioactive waste repository in many countries. Radioactive waste can contain toxic chemicals such as As, Cr and B leading to evaluate their migration in such clay systems. Sub-surface clay-rich Rocks are notably characterized by redox transitions, which can influence the migration of many contaminants 1. The retention behavior of arsenic (As), chromium (Cr) and boron (B), was investigated for an outcropping clay-Rock Formation, the Albian Tegulines Clay (France, Aube) currently studied as potential a host-Rock for long-live low activity level (LL-LL) radioactive waste At the vicinity of the surface, Tegulines Clay is affected by weathering processes leading to contrasted geochemical conditions with depth. One of the main features of the weathering is the occurrence of a redox transition zone near the surface. Batch sorption experiments of As(V), As(III), Cr(VI) and B were performed on samples collected at two depths representative either of oxidized or reduced mineral assemblages. Batch sorption experiments highlighted a distinct behavior of As, Cr and B oxyanions. The in-situ redox state of the Tegulines Clay samples has a significant effect on Cr retention (Cr(VI) heterogeneous reduction reactions followed by Cr(III) precipitation). On the contrary, As(V) reduction into As(III) is moderate and its retention slightly affected by the in-situ redox state of the Tegulines Clay. As(V) retention is higher than As(III) retention. Boron retention is strongly influenced by its natural abundance in the Tegulines clay samples and the distribution coefficient of B (Kd) is expected to be very low for in-situ conditions due to the significant amount of natural B in the pore water 2. The comparison of the retention properties of two Tegulines Clay samples towards three oxyanions with contrasted chemical properties highlighted the roles of clay mineralogy, natural abundance, and reducing capacity of the investigated materials. References: 1Lerouge, C. et al., 2018. Geofluids, 20. 2Debure, M. et al., 2018. Science of The Total Environment, 642, 216-229.

  • retention of arsenic chromium and boron on an outcropping clay rich Rock Formation the tegulines clay eastern france
    Science of The Total Environment, 2018
    Co-Authors: Mathieu Debure, Christophe Tournassat, Catherine Lerouge, Benoît Made, Jean-charles Robinet, Ana María Fernández, Sylvain Grangeon
    Abstract:

    The retention behavior of three toxic chemicals, As, Cr and B, was investigated for an outcropping Rock Formation, the Albian Tegulines Clay (France, Aube). At a shallow depth, Tegulines Clay is affected by weathering processes leading to contrasted geochemical conditions with depth. One of the main features of the weathering is the occurrence of a redox transition zone near the surface. Batch sorption experiments of As(V), As(III), Cr(VI) and B were performed on samples collected at two depths representative either of oxidized or reduced mineral assemblages. Batch sorption experiments highlighted a distinct behavior between As, Cr and B oxyanions. Cr(VI) retention behavior was dominated by redox phenomena, notably its reduction to Cr(III). The in-situ redox state of the Tegulines Clay samples has a significant effect on Cr retention. On the contrary, As(V) reduction into As(III) is moderate and its retention slightly affected by the in-situ redox state of the Tegulines Clay. As(V) retention is higher than As(III) retention in agreement with literature data. B retention is strongly related to its natural abundance in the Tegulines clay samples. Distribution coefficient of B corrected from its natural content is expected to be very low for in-situ conditions. Finally, the retention and mobility of these oxyanions were affected by clay mineralogy, natural abundance, and reducing capacity of the Tegulines Clay.

  • Retention of arsenic, chromium and boron on an outcropping clay-rich Rock Formation (the Tégulines Clay, eastern France)
    Science of the Total Environment, 2018
    Co-Authors: Mathieu Debure, Christophe Tournassat, Catherine Lerouge, Benoît Made, Jean-charles Robinet, Ana María Fernández, Sylvain Grangeon
    Abstract:

    The retention behavior of three toxic chemicals, As, Cr and B, was investigated for an outcropping Rock Formation, the Albian Tégulines Clay (France, Aube). At a shallow depth, Tégulines Clay is affected by weathering processes leading to contrasted geochemical conditions with depth. One of the main features of the weathering is the occurrence of a redox transition zone near the surface. Batch sorption experiments of As(V), As(III), Cr(VI) and B were performed on samples collected at two depths representative either of oxidized or reduced mineral assemblages. Batch sorption experiments highlighted a distinct behavior between As, Cr and B oxyanions. Cr(VI) retention behavior was dominated by redox phenomena, notably its reduction to Cr(III). The in-situ redox state of the Tégulines Clay samples has a significant effect on Cr retention. On the contrary, As(V) reduction into As(III) is moderate and its retention slightly affected by the in-situ redox state of the Tégulines Clay. As(V) retention is higher than As(III) retention in agreement with literature data. B retention is strongly related to its natural abundance in the Tégulines clay samples. Distribution coefficient of B corrected from its natural content is expected to be very low for in-situ conditions. Finally, the retention and mobility of these oxyanions were affected by clay mineralogy, natural abundance, and reducing capacity of the Tegulines Clay.

Christophe Tournassat - One of the best experts on this subject based on the ideXlab platform.

  • Retention of arsenic, chromium and boron on an outcropping clay-rich Rock Formation (the Tégulines Clay, eastern France)
    2019
    Co-Authors: Mathieu Debure, Christophe Tournassat, Catherine Lerouge, Benoît Made, Jean-charles Robinet, Ana Fernández, Sylvain Grangeon
    Abstract:

    In many countries, environmental impact of toxic chemicals has to be considered for the implementation of industrial facilities. The assessment of the toxic chemical environmental impact for a given facility requires evaluating the mobility of the various toxic chemicals potentially involved in the industrial activity in its surrounding environment. Numerical evaluations of the migration of the identified toxic elements from the industrial facilities toward the biosphere necessitate a good parametrization of their retention behavior. Outcropping clay-rich Formations are considered as a potential host for a radioactive waste repository in many countries. Radioactive waste can contain toxic chemicals such as As, Cr and B leading to evaluate their migration in such clay systems. Sub-surface clay-rich Rocks are notably characterized by redox transitions, which can influence the migration of many contaminants 1. The retention behavior of arsenic (As), chromium (Cr) and boron (B), was investigated for an outcropping clay-Rock Formation, the Albian Tégulines Clay (France, Aube) currently studied as potential a host-Rock for long-live low activity level (LL-LL) radioactive waste At the vicinity of the surface, Tégulines Clay is affected by weathering processes leading to contrasted geochemical conditions with depth. One of the main features of the weathering is the occurrence of a redox transition zone near the surface. Batch sorption experiments of As(V), As(III), Cr(VI) and B were performed on samples collected at two depths representative either of oxidized or reduced mineral assemblages. Batch sorption experiments highlighted a distinct behavior of As, Cr and B oxyanions. The in-situ redox state of the Tégulines Clay samples has a significant effect on Cr retention (Cr(VI) heterogeneous reduction reactions followed by Cr(III) precipitation). On the contrary, As(V) reduction into As(III) is moderate and its retention slightly affected by the in-situ redox state of the Tégulines Clay. As(V) retention is higher than As(III) retention. Boron retention is strongly influenced by its natural abundance in the Tégulines clay samples and the distribution coefficient of B (Kd) is expected to be very low for in-situ conditions due to the significant amount of natural B in the pore water 2. The comparison of the retention properties of two Tégulines Clay samples towards three oxyanions with contrasted chemical properties highlighted the roles of clay mineralogy, natural abundance, and reducing capacity of the investigated materials. References: 1Lerouge, C. et al., 2018. Geofluids, 20. 2Debure, M. et al., 2018. Science of The Total Environment, 642, 216-229.

  • retention of arsenic chromium and boron on an outcropping clay rich Rock Formation the tegulines clay eastern france
    Euroclay, 2019
    Co-Authors: Mathieu Debure, Christophe Tournassat, Catherine Lerouge, Benoît Made, Jean-charles Robinet, Ana María Fernández, Sylvain Grangeon
    Abstract:

    In many countries, environmental impact of toxic chemicals has to be considered for the implementation of industrial facilities. The assessment of the toxic chemical environmental impact for a given facility requires evaluating the mobility of the various toxic chemicals potentially involved in the industrial activity in its surrounding environment. Numerical evaluations of the migration of the identified toxic elements from the industrial facilities toward the biosphere necessitate a good parametrization of their retention behavior. Outcropping clay-rich Formations are considered as a potential host for a radioactive waste repository in many countries. Radioactive waste can contain toxic chemicals such as As, Cr and B leading to evaluate their migration in such clay systems. Sub-surface clay-rich Rocks are notably characterized by redox transitions, which can influence the migration of many contaminants 1. The retention behavior of arsenic (As), chromium (Cr) and boron (B), was investigated for an outcropping clay-Rock Formation, the Albian Tegulines Clay (France, Aube) currently studied as potential a host-Rock for long-live low activity level (LL-LL) radioactive waste At the vicinity of the surface, Tegulines Clay is affected by weathering processes leading to contrasted geochemical conditions with depth. One of the main features of the weathering is the occurrence of a redox transition zone near the surface. Batch sorption experiments of As(V), As(III), Cr(VI) and B were performed on samples collected at two depths representative either of oxidized or reduced mineral assemblages. Batch sorption experiments highlighted a distinct behavior of As, Cr and B oxyanions. The in-situ redox state of the Tegulines Clay samples has a significant effect on Cr retention (Cr(VI) heterogeneous reduction reactions followed by Cr(III) precipitation). On the contrary, As(V) reduction into As(III) is moderate and its retention slightly affected by the in-situ redox state of the Tegulines Clay. As(V) retention is higher than As(III) retention. Boron retention is strongly influenced by its natural abundance in the Tegulines clay samples and the distribution coefficient of B (Kd) is expected to be very low for in-situ conditions due to the significant amount of natural B in the pore water 2. The comparison of the retention properties of two Tegulines Clay samples towards three oxyanions with contrasted chemical properties highlighted the roles of clay mineralogy, natural abundance, and reducing capacity of the investigated materials. References: 1Lerouge, C. et al., 2018. Geofluids, 20. 2Debure, M. et al., 2018. Science of The Total Environment, 642, 216-229.

  • retention of arsenic chromium and boron on an outcropping clay rich Rock Formation the tegulines clay eastern france
    Science of The Total Environment, 2018
    Co-Authors: Mathieu Debure, Christophe Tournassat, Catherine Lerouge, Benoît Made, Jean-charles Robinet, Ana María Fernández, Sylvain Grangeon
    Abstract:

    The retention behavior of three toxic chemicals, As, Cr and B, was investigated for an outcropping Rock Formation, the Albian Tegulines Clay (France, Aube). At a shallow depth, Tegulines Clay is affected by weathering processes leading to contrasted geochemical conditions with depth. One of the main features of the weathering is the occurrence of a redox transition zone near the surface. Batch sorption experiments of As(V), As(III), Cr(VI) and B were performed on samples collected at two depths representative either of oxidized or reduced mineral assemblages. Batch sorption experiments highlighted a distinct behavior between As, Cr and B oxyanions. Cr(VI) retention behavior was dominated by redox phenomena, notably its reduction to Cr(III). The in-situ redox state of the Tegulines Clay samples has a significant effect on Cr retention. On the contrary, As(V) reduction into As(III) is moderate and its retention slightly affected by the in-situ redox state of the Tegulines Clay. As(V) retention is higher than As(III) retention in agreement with literature data. B retention is strongly related to its natural abundance in the Tegulines clay samples. Distribution coefficient of B corrected from its natural content is expected to be very low for in-situ conditions. Finally, the retention and mobility of these oxyanions were affected by clay mineralogy, natural abundance, and reducing capacity of the Tegulines Clay.

  • Retention of arsenic, chromium and boron on an outcropping clay-rich Rock Formation (the Tégulines Clay, eastern France)
    Science of the Total Environment, 2018
    Co-Authors: Mathieu Debure, Christophe Tournassat, Catherine Lerouge, Benoît Made, Jean-charles Robinet, Ana María Fernández, Sylvain Grangeon
    Abstract:

    The retention behavior of three toxic chemicals, As, Cr and B, was investigated for an outcropping Rock Formation, the Albian Tégulines Clay (France, Aube). At a shallow depth, Tégulines Clay is affected by weathering processes leading to contrasted geochemical conditions with depth. One of the main features of the weathering is the occurrence of a redox transition zone near the surface. Batch sorption experiments of As(V), As(III), Cr(VI) and B were performed on samples collected at two depths representative either of oxidized or reduced mineral assemblages. Batch sorption experiments highlighted a distinct behavior between As, Cr and B oxyanions. Cr(VI) retention behavior was dominated by redox phenomena, notably its reduction to Cr(III). The in-situ redox state of the Tégulines Clay samples has a significant effect on Cr retention. On the contrary, As(V) reduction into As(III) is moderate and its retention slightly affected by the in-situ redox state of the Tégulines Clay. As(V) retention is higher than As(III) retention in agreement with literature data. B retention is strongly related to its natural abundance in the Tégulines clay samples. Distribution coefficient of B corrected from its natural content is expected to be very low for in-situ conditions. Finally, the retention and mobility of these oxyanions were affected by clay mineralogy, natural abundance, and reducing capacity of the Tegulines Clay.

Catherine Lerouge - One of the best experts on this subject based on the ideXlab platform.

  • Retention of arsenic, chromium and boron on an outcropping clay-rich Rock Formation (the Tégulines Clay, eastern France)
    2019
    Co-Authors: Mathieu Debure, Christophe Tournassat, Catherine Lerouge, Benoît Made, Jean-charles Robinet, Ana Fernández, Sylvain Grangeon
    Abstract:

    In many countries, environmental impact of toxic chemicals has to be considered for the implementation of industrial facilities. The assessment of the toxic chemical environmental impact for a given facility requires evaluating the mobility of the various toxic chemicals potentially involved in the industrial activity in its surrounding environment. Numerical evaluations of the migration of the identified toxic elements from the industrial facilities toward the biosphere necessitate a good parametrization of their retention behavior. Outcropping clay-rich Formations are considered as a potential host for a radioactive waste repository in many countries. Radioactive waste can contain toxic chemicals such as As, Cr and B leading to evaluate their migration in such clay systems. Sub-surface clay-rich Rocks are notably characterized by redox transitions, which can influence the migration of many contaminants 1. The retention behavior of arsenic (As), chromium (Cr) and boron (B), was investigated for an outcropping clay-Rock Formation, the Albian Tégulines Clay (France, Aube) currently studied as potential a host-Rock for long-live low activity level (LL-LL) radioactive waste At the vicinity of the surface, Tégulines Clay is affected by weathering processes leading to contrasted geochemical conditions with depth. One of the main features of the weathering is the occurrence of a redox transition zone near the surface. Batch sorption experiments of As(V), As(III), Cr(VI) and B were performed on samples collected at two depths representative either of oxidized or reduced mineral assemblages. Batch sorption experiments highlighted a distinct behavior of As, Cr and B oxyanions. The in-situ redox state of the Tégulines Clay samples has a significant effect on Cr retention (Cr(VI) heterogeneous reduction reactions followed by Cr(III) precipitation). On the contrary, As(V) reduction into As(III) is moderate and its retention slightly affected by the in-situ redox state of the Tégulines Clay. As(V) retention is higher than As(III) retention. Boron retention is strongly influenced by its natural abundance in the Tégulines clay samples and the distribution coefficient of B (Kd) is expected to be very low for in-situ conditions due to the significant amount of natural B in the pore water 2. The comparison of the retention properties of two Tégulines Clay samples towards three oxyanions with contrasted chemical properties highlighted the roles of clay mineralogy, natural abundance, and reducing capacity of the investigated materials. References: 1Lerouge, C. et al., 2018. Geofluids, 20. 2Debure, M. et al., 2018. Science of The Total Environment, 642, 216-229.

  • retention of arsenic chromium and boron on an outcropping clay rich Rock Formation the tegulines clay eastern france
    Euroclay, 2019
    Co-Authors: Mathieu Debure, Christophe Tournassat, Catherine Lerouge, Benoît Made, Jean-charles Robinet, Ana María Fernández, Sylvain Grangeon
    Abstract:

    In many countries, environmental impact of toxic chemicals has to be considered for the implementation of industrial facilities. The assessment of the toxic chemical environmental impact for a given facility requires evaluating the mobility of the various toxic chemicals potentially involved in the industrial activity in its surrounding environment. Numerical evaluations of the migration of the identified toxic elements from the industrial facilities toward the biosphere necessitate a good parametrization of their retention behavior. Outcropping clay-rich Formations are considered as a potential host for a radioactive waste repository in many countries. Radioactive waste can contain toxic chemicals such as As, Cr and B leading to evaluate their migration in such clay systems. Sub-surface clay-rich Rocks are notably characterized by redox transitions, which can influence the migration of many contaminants 1. The retention behavior of arsenic (As), chromium (Cr) and boron (B), was investigated for an outcropping clay-Rock Formation, the Albian Tegulines Clay (France, Aube) currently studied as potential a host-Rock for long-live low activity level (LL-LL) radioactive waste At the vicinity of the surface, Tegulines Clay is affected by weathering processes leading to contrasted geochemical conditions with depth. One of the main features of the weathering is the occurrence of a redox transition zone near the surface. Batch sorption experiments of As(V), As(III), Cr(VI) and B were performed on samples collected at two depths representative either of oxidized or reduced mineral assemblages. Batch sorption experiments highlighted a distinct behavior of As, Cr and B oxyanions. The in-situ redox state of the Tegulines Clay samples has a significant effect on Cr retention (Cr(VI) heterogeneous reduction reactions followed by Cr(III) precipitation). On the contrary, As(V) reduction into As(III) is moderate and its retention slightly affected by the in-situ redox state of the Tegulines Clay. As(V) retention is higher than As(III) retention. Boron retention is strongly influenced by its natural abundance in the Tegulines clay samples and the distribution coefficient of B (Kd) is expected to be very low for in-situ conditions due to the significant amount of natural B in the pore water 2. The comparison of the retention properties of two Tegulines Clay samples towards three oxyanions with contrasted chemical properties highlighted the roles of clay mineralogy, natural abundance, and reducing capacity of the investigated materials. References: 1Lerouge, C. et al., 2018. Geofluids, 20. 2Debure, M. et al., 2018. Science of The Total Environment, 642, 216-229.

  • retention of arsenic chromium and boron on an outcropping clay rich Rock Formation the tegulines clay eastern france
    Science of The Total Environment, 2018
    Co-Authors: Mathieu Debure, Christophe Tournassat, Catherine Lerouge, Benoît Made, Jean-charles Robinet, Ana María Fernández, Sylvain Grangeon
    Abstract:

    The retention behavior of three toxic chemicals, As, Cr and B, was investigated for an outcropping Rock Formation, the Albian Tegulines Clay (France, Aube). At a shallow depth, Tegulines Clay is affected by weathering processes leading to contrasted geochemical conditions with depth. One of the main features of the weathering is the occurrence of a redox transition zone near the surface. Batch sorption experiments of As(V), As(III), Cr(VI) and B were performed on samples collected at two depths representative either of oxidized or reduced mineral assemblages. Batch sorption experiments highlighted a distinct behavior between As, Cr and B oxyanions. Cr(VI) retention behavior was dominated by redox phenomena, notably its reduction to Cr(III). The in-situ redox state of the Tegulines Clay samples has a significant effect on Cr retention. On the contrary, As(V) reduction into As(III) is moderate and its retention slightly affected by the in-situ redox state of the Tegulines Clay. As(V) retention is higher than As(III) retention in agreement with literature data. B retention is strongly related to its natural abundance in the Tegulines clay samples. Distribution coefficient of B corrected from its natural content is expected to be very low for in-situ conditions. Finally, the retention and mobility of these oxyanions were affected by clay mineralogy, natural abundance, and reducing capacity of the Tegulines Clay.

  • Retention of arsenic, chromium and boron on an outcropping clay-rich Rock Formation (the Tégulines Clay, eastern France)
    Science of the Total Environment, 2018
    Co-Authors: Mathieu Debure, Christophe Tournassat, Catherine Lerouge, Benoît Made, Jean-charles Robinet, Ana María Fernández, Sylvain Grangeon
    Abstract:

    The retention behavior of three toxic chemicals, As, Cr and B, was investigated for an outcropping Rock Formation, the Albian Tégulines Clay (France, Aube). At a shallow depth, Tégulines Clay is affected by weathering processes leading to contrasted geochemical conditions with depth. One of the main features of the weathering is the occurrence of a redox transition zone near the surface. Batch sorption experiments of As(V), As(III), Cr(VI) and B were performed on samples collected at two depths representative either of oxidized or reduced mineral assemblages. Batch sorption experiments highlighted a distinct behavior between As, Cr and B oxyanions. Cr(VI) retention behavior was dominated by redox phenomena, notably its reduction to Cr(III). The in-situ redox state of the Tégulines Clay samples has a significant effect on Cr retention. On the contrary, As(V) reduction into As(III) is moderate and its retention slightly affected by the in-situ redox state of the Tégulines Clay. As(V) retention is higher than As(III) retention in agreement with literature data. B retention is strongly related to its natural abundance in the Tégulines clay samples. Distribution coefficient of B corrected from its natural content is expected to be very low for in-situ conditions. Finally, the retention and mobility of these oxyanions were affected by clay mineralogy, natural abundance, and reducing capacity of the Tegulines Clay.

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  • Retention of arsenic, chromium and boron on an outcropping clay-rich Rock Formation (the Tégulines Clay, eastern France)
    2019
    Co-Authors: Mathieu Debure, Christophe Tournassat, Catherine Lerouge, Benoît Made, Jean-charles Robinet, Ana Fernández, Sylvain Grangeon
    Abstract:

    In many countries, environmental impact of toxic chemicals has to be considered for the implementation of industrial facilities. The assessment of the toxic chemical environmental impact for a given facility requires evaluating the mobility of the various toxic chemicals potentially involved in the industrial activity in its surrounding environment. Numerical evaluations of the migration of the identified toxic elements from the industrial facilities toward the biosphere necessitate a good parametrization of their retention behavior. Outcropping clay-rich Formations are considered as a potential host for a radioactive waste repository in many countries. Radioactive waste can contain toxic chemicals such as As, Cr and B leading to evaluate their migration in such clay systems. Sub-surface clay-rich Rocks are notably characterized by redox transitions, which can influence the migration of many contaminants 1. The retention behavior of arsenic (As), chromium (Cr) and boron (B), was investigated for an outcropping clay-Rock Formation, the Albian Tégulines Clay (France, Aube) currently studied as potential a host-Rock for long-live low activity level (LL-LL) radioactive waste At the vicinity of the surface, Tégulines Clay is affected by weathering processes leading to contrasted geochemical conditions with depth. One of the main features of the weathering is the occurrence of a redox transition zone near the surface. Batch sorption experiments of As(V), As(III), Cr(VI) and B were performed on samples collected at two depths representative either of oxidized or reduced mineral assemblages. Batch sorption experiments highlighted a distinct behavior of As, Cr and B oxyanions. The in-situ redox state of the Tégulines Clay samples has a significant effect on Cr retention (Cr(VI) heterogeneous reduction reactions followed by Cr(III) precipitation). On the contrary, As(V) reduction into As(III) is moderate and its retention slightly affected by the in-situ redox state of the Tégulines Clay. As(V) retention is higher than As(III) retention. Boron retention is strongly influenced by its natural abundance in the Tégulines clay samples and the distribution coefficient of B (Kd) is expected to be very low for in-situ conditions due to the significant amount of natural B in the pore water 2. The comparison of the retention properties of two Tégulines Clay samples towards three oxyanions with contrasted chemical properties highlighted the roles of clay mineralogy, natural abundance, and reducing capacity of the investigated materials. References: 1Lerouge, C. et al., 2018. Geofluids, 20. 2Debure, M. et al., 2018. Science of The Total Environment, 642, 216-229.

  • retention of arsenic chromium and boron on an outcropping clay rich Rock Formation the tegulines clay eastern france
    Euroclay, 2019
    Co-Authors: Mathieu Debure, Christophe Tournassat, Catherine Lerouge, Benoît Made, Jean-charles Robinet, Ana María Fernández, Sylvain Grangeon
    Abstract:

    In many countries, environmental impact of toxic chemicals has to be considered for the implementation of industrial facilities. The assessment of the toxic chemical environmental impact for a given facility requires evaluating the mobility of the various toxic chemicals potentially involved in the industrial activity in its surrounding environment. Numerical evaluations of the migration of the identified toxic elements from the industrial facilities toward the biosphere necessitate a good parametrization of their retention behavior. Outcropping clay-rich Formations are considered as a potential host for a radioactive waste repository in many countries. Radioactive waste can contain toxic chemicals such as As, Cr and B leading to evaluate their migration in such clay systems. Sub-surface clay-rich Rocks are notably characterized by redox transitions, which can influence the migration of many contaminants 1. The retention behavior of arsenic (As), chromium (Cr) and boron (B), was investigated for an outcropping clay-Rock Formation, the Albian Tegulines Clay (France, Aube) currently studied as potential a host-Rock for long-live low activity level (LL-LL) radioactive waste At the vicinity of the surface, Tegulines Clay is affected by weathering processes leading to contrasted geochemical conditions with depth. One of the main features of the weathering is the occurrence of a redox transition zone near the surface. Batch sorption experiments of As(V), As(III), Cr(VI) and B were performed on samples collected at two depths representative either of oxidized or reduced mineral assemblages. Batch sorption experiments highlighted a distinct behavior of As, Cr and B oxyanions. The in-situ redox state of the Tegulines Clay samples has a significant effect on Cr retention (Cr(VI) heterogeneous reduction reactions followed by Cr(III) precipitation). On the contrary, As(V) reduction into As(III) is moderate and its retention slightly affected by the in-situ redox state of the Tegulines Clay. As(V) retention is higher than As(III) retention. Boron retention is strongly influenced by its natural abundance in the Tegulines clay samples and the distribution coefficient of B (Kd) is expected to be very low for in-situ conditions due to the significant amount of natural B in the pore water 2. The comparison of the retention properties of two Tegulines Clay samples towards three oxyanions with contrasted chemical properties highlighted the roles of clay mineralogy, natural abundance, and reducing capacity of the investigated materials. References: 1Lerouge, C. et al., 2018. Geofluids, 20. 2Debure, M. et al., 2018. Science of The Total Environment, 642, 216-229.

  • retention of arsenic chromium and boron on an outcropping clay rich Rock Formation the tegulines clay eastern france
    Science of The Total Environment, 2018
    Co-Authors: Mathieu Debure, Christophe Tournassat, Catherine Lerouge, Benoît Made, Jean-charles Robinet, Ana María Fernández, Sylvain Grangeon
    Abstract:

    The retention behavior of three toxic chemicals, As, Cr and B, was investigated for an outcropping Rock Formation, the Albian Tegulines Clay (France, Aube). At a shallow depth, Tegulines Clay is affected by weathering processes leading to contrasted geochemical conditions with depth. One of the main features of the weathering is the occurrence of a redox transition zone near the surface. Batch sorption experiments of As(V), As(III), Cr(VI) and B were performed on samples collected at two depths representative either of oxidized or reduced mineral assemblages. Batch sorption experiments highlighted a distinct behavior between As, Cr and B oxyanions. Cr(VI) retention behavior was dominated by redox phenomena, notably its reduction to Cr(III). The in-situ redox state of the Tegulines Clay samples has a significant effect on Cr retention. On the contrary, As(V) reduction into As(III) is moderate and its retention slightly affected by the in-situ redox state of the Tegulines Clay. As(V) retention is higher than As(III) retention in agreement with literature data. B retention is strongly related to its natural abundance in the Tegulines clay samples. Distribution coefficient of B corrected from its natural content is expected to be very low for in-situ conditions. Finally, the retention and mobility of these oxyanions were affected by clay mineralogy, natural abundance, and reducing capacity of the Tegulines Clay.

  • Retention of arsenic, chromium and boron on an outcropping clay-rich Rock Formation (the Tégulines Clay, eastern France)
    Science of the Total Environment, 2018
    Co-Authors: Mathieu Debure, Christophe Tournassat, Catherine Lerouge, Benoît Made, Jean-charles Robinet, Ana María Fernández, Sylvain Grangeon
    Abstract:

    The retention behavior of three toxic chemicals, As, Cr and B, was investigated for an outcropping Rock Formation, the Albian Tégulines Clay (France, Aube). At a shallow depth, Tégulines Clay is affected by weathering processes leading to contrasted geochemical conditions with depth. One of the main features of the weathering is the occurrence of a redox transition zone near the surface. Batch sorption experiments of As(V), As(III), Cr(VI) and B were performed on samples collected at two depths representative either of oxidized or reduced mineral assemblages. Batch sorption experiments highlighted a distinct behavior between As, Cr and B oxyanions. Cr(VI) retention behavior was dominated by redox phenomena, notably its reduction to Cr(III). The in-situ redox state of the Tégulines Clay samples has a significant effect on Cr retention. On the contrary, As(V) reduction into As(III) is moderate and its retention slightly affected by the in-situ redox state of the Tégulines Clay. As(V) retention is higher than As(III) retention in agreement with literature data. B retention is strongly related to its natural abundance in the Tégulines clay samples. Distribution coefficient of B corrected from its natural content is expected to be very low for in-situ conditions. Finally, the retention and mobility of these oxyanions were affected by clay mineralogy, natural abundance, and reducing capacity of the Tegulines Clay.