The Experts below are selected from a list of 1521 Experts worldwide ranked by ideXlab platform
Pierre Faure - One of the best experts on this subject based on the ideXlab platform.
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fenton like and potassium permanganate oxidations of pah contaminated soils impact of oxidant doses on pah and polar pac polycyclic aromatic compound behavior
Chemosphere, 2019Co-Authors: Marine Boulangé, Coralie Biache, Alain Saada, Catherine Lorgeoux, Pierre FaureAbstract:Potassium permanganate and Fenton-like oxidations were applied on two PAH-contaminated soils collected on former Coking Plant and gas Plant sites. The impact of oxidant dose on the polycyclic aromatic compound (PAC) evolution, including 16 US-EPA PAHs, 11 oxygenated- and 4 nitrogen heterocyclic-PACs (O- and N-PACs) was studied for both treatments. The content of extractable organic matter and PACs was determined prior and after oxidation. Overall, permanganate treatment was more efficient than Fenton-like to decrease the PAH content, this latter being limited by the contamination availability. However, permanganate treatment resulted in incomplete PAH degradation, leading to the formation of O-PACs, that was limited with the application of higher dose. It underlines the importance of the dose and the oxidant type in the selection of oxidation parameters for remediation purpose, as improper use of oxidant can lead to the accumulation of oxidation by-products that could be as toxic as the parent compounds.
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low temperature oxidation of a Coking Plant soil organic matter and its major constituents an experimental approach to simulate a long term evolution
Journal of Hazardous Materials, 2011Co-Authors: Coralie Biache, Pierre Faure, Thierry Ghislain, Laurence MansuyhuaultAbstract:In contaminated soils, several natural processes (biodegradation, oxidation, etc.) can induce degradation of organic pollutants. The aim of this work was to evaluate the impact of an abiotic low-temperature oxidation on a Coking Plant soil and its main organic constituents (coal, coke, coal tar and road asphalts) in order to understand its long term evolution. This natural process was experimentally reproduced by oxidizing the soil and isolated organic matrices at 100 °C during 180 days. The samples were analyzed by total organic carbon measurements and elemental analyses, and the solvent-extractable organic matter was quantified by GC-MS (gas chromatography-mass spectrometry). Oxidation experiments on coal, coal tar and Coking Plant soil samples lead to the decrease in polycyclic aromatic hydrocarbon (PAH) concentrations correlated to an incorporation of oxygen evidenced by the production of oxygenated PAHs. The increasing amount of polar macromolecules and the decrease in solvent-extractable organic matter suggest a molecular growth through ether/ester cross-linking. The chemical environment of organic compounds and the presence of a reactive mineral fraction are important parameters that improve the efficiency of oxidation. This work reveals that abiotic low temperature oxidation, can strongly contribute to pollutant removal especially by a stabilization process and should be considered in the long term evolution of a soil.
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effects of thermal desorption on the composition of two Coking Plant soils impact on solvent extractable organic compounds and metal bioavailability
Environmental Pollution, 2008Co-Authors: Coralie Biache, Pierre Faure, Laurence Mansuyhuault, Colette Munierlamy, Corinne LeyvalAbstract:To evaluate the efficiency and the influence of thermal desorption on the soil organic compartment, contaminated soils from Coking Plant sites (NM and H) were compared to their counterparts treated with thermodesorption. The extractable organic matter, and the metal content and distribution with soil compartments were studied. In both thermodesorbed soils, PAH (polycyclic aromatic hydrocarbon) degradation exceeded 90%. However, the thermal desorption led not only to a volatilization of the organic compounds but also to the condensation of extractable organic matter. The treatments only affected the Fe and Zn distribution within the more stable fractions, whereas the organic compound degradation did not affect their mobility and availability.
Rosa M Martineztarazona - One of the best experts on this subject based on the ideXlab platform.
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impact of a semi industrial coke processing Plant in the surrounding surface soil part ii pah content
Fuel Processing Technology, 2012Co-Authors: Roberto Garcia, Antonia M Lopezanton, Montserrat Calvo, Sonia Suárez, Mercedes Diazsomoano, Isabel Suarez Ruiz, Rosa M MartineztarazonaAbstract:Abstract Topsoil samples taken from different areas of a disused experimental Coking Plant were analysed in order to determine their polycyclic aromatic hydrocarbon (PAH) concentration. The variation in concentrations as a function of distance from the Coking oven battery was studied and a reduction in PAH concentration as the distance to the Coking ovens' battery increases was observed. Two exceptions are the area in the vicinity of the tar distillation section of the Plant, with a strong contribution from high temperature tar, and the area where hot coke was taken out of the ovens, with lower concentrations than expected, as a consequence of the significant presence of coke in the soil. Isomer ratios were calculated, indicating that coal is the source of the PAHs in the soil, but also suggesting an influence of transportation fuels. A comparison of the A horizon samples evidences PAH leaching.
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impact of a semi industrial coke processing Plant in the surrounding surface soil part i trace element content
Fuel Processing Technology, 2012Co-Authors: Mercedes Diazsomoano, Antonia M Lopezanton, Montserrat Calvo, Sonia Suárez, Isabel Suarezruiz, Roberto Garcia, Rosa M MartineztarazonaAbstract:Abstract Soil pollution by anthropogenic activities is an important environmental issue especially in industrialized countries. The objective of this study is to evaluate the environmental impact of a coal conversion Plant on the surrounding soil by measuring the spatial distribution of particulate organic carbon and determining the concentration of trace elements (part I) and PAHs (part II). The results indicate that the surface soil presents an increase in the content of organic particulates with values exceeding 80% vol. at the centre of the Coking Plant facilities. The concentrations rapidly decrease as the distance from the Plant increases. Although concentrations of As, Cd, Co, Cr, Cu, Hg, Ni, Pb, and Zn in most cases did not exceed the environmental limits, a clear relationship was established between the presence of some of these elements and the high values of particulate organic carbon content found in the proximity of the Plant.
Faure Pierre - One of the best experts on this subject based on the ideXlab platform.
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Permanganate oxidation of polycyclic aromatic compounds (PAHs and polar PACs): column experiments with DNAPL at residual saturation
'Springer Science and Business Media LLC', 2021Co-Authors: Johansson Clotilde, Lorgeoux Catherine, Biache Coralie, Bataillard Philippe, Colombano Stéfan, Joubert Antoine, Défarge Christian, Faure PierreAbstract:International audiencePermanganate is an oxidant usually applied for in situ soil remediation due to its persistence underground. It has already shown great efficiency for dense nonaqueous phase liquid (DNAPL) degradation under batch experiment conditions. In the present study, experimental permanganate oxidation of a DNAPL — coal tar — sampled in the groundwater of a former Coking Plant was carried out in a glass bead column. Several glass bead columns were spiked with coal tar using the drainage-imbibition method to mimic on-site pollution spread at residual saturation as best as possible. The leaching of organic pollutants was monitored as the columns were flushed by successive sequences: successive injections of hot water, permanganate solution for oxidation, and ambient temperature water, completed by two injections of a tracer before and after oxidation. Sixteen conventional US-EPA PAHs and selected polar PACs were analyzed in the DNAPL remaining in the columns at the end of the experiment and in the particles collected at several steps of the flushing sequences. Permanganate oxidation of the pollutants was rapidly limited by interfacial aging of the DNAPL drops. Moreover, at the applied flow rate chosen to be representative of in situ injections and groundwater velocities, the reaction time was not sufficient to reach high degradation yields but induced the formation and the leaching of oxygenated PAC
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FerrateVI oxidation of polycyclic aromatic compounds (PAHs and polar PACs) on DNAPL-spiked sand: degradation efficiency and oxygenated by-product formation compared to conventional oxidants
Springer Verlag, 2020Co-Authors: Johansson Clotilde, Lorgeoux Catherine, Biache Coralie, Bataillard Philippe, Colombano Stéfan, Joubert Antoine, Pigot Thierry, Faure PierreAbstract:International audienceIn situ chemical oxidations are known to remediate PAH contaminations in groundwater and soils. In this study, batch-scale oxidations aim to compare the PAC (polycyclic aromatic compound) degradation of three oxidation processes traditionally applied for soil treatment: permanganate, heat-activated persulfate (60 °C) and Fenton-like activated by magnetite, to results obtained with ferrates (FeVI). Widely studied for water treatments, ferrates are efficient on a wide range of pollutants with the advantage of producing nontoxic ferric sludge after reaction. However, fewer works focus on their action on soil, especially on semi-industrial grade ferrates (compatible with field application). Oxidations were carried out on sand spiked with dense non-aqueous phase liquid (DNAPL) sampled in the groundwater of a former Coking Plant. Conventional 16 US-EPA PAHs and polar PACs were monitored, especially potential oxygenated by-products that can be more harmful than parent-PAHs. After seven reaction days, only the Fenton-like showed limited degradation. Highest efficiencies were obtained for heat-activated persulfate with no O-PAC ketones formed. Permanganate gave important degradation, but ketones were generated in large amount. The tested ferrates not only gave slightly lower yields due to their auto-decomposition but also induced O-PAC ketone production, suggesting a reactional pathway dominated by oxidoreductive electron transfer, rather than a radical one
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Fenton-like and potassium permanganate oxidations of PAH-contaminated soils: Impact of oxidant doses on PAH and polar PAC (polycyclic aromatic compound) behavior
'Elsevier BV', 2019Co-Authors: Boulange Marine, Lorgeoux Catherine, Biache Coralie, Saada Alain, Faure PierreAbstract:International audience(C. Biache). HIGHLIGHTS KMnO4 and Fenton-like treatments were applied to PAH contaminated soils. The impact of two oxidant doses on PAC contamination were studied. Treatments were less efficient on soil with low PAC availability. KMnO4 was more efficient to degrade the PAH than Fenton-like. Low dose of KMnO4 induced the formation of toxic oxygenated by-products. Abstract Potassium permanganate and Fenton-like oxidations were applied on two PAH-contaminated soils collected on former Coking Plant and gas Plant sites. The impact of oxidant dose on the polycyclic aromatic compound (PAC) evolution, including 16 US-EPA PAHs, 11 oxygenated-and 4 nitrogen heterocyclic-PACs (O-and N-PACs) was studied for both treatments. The content of extractable organic matter and PACs was determined prior and after oxidation. Overall, permanganate treatment was more efficient than Fenton-like to decrease the PAH content, this latter being limited by the contamination availability. However, permanganate treatment resulted in incomplete PAH degradation, leading to the formation of O-PACs, that was limited with the application of higher dose. It underlines the importance of the dose and the oxidant type in the selection of oxidation parameters for remediation purpose, as improper use of oxidant can lead to the accumulation of oxidation by-products that could be as toxic as the parent compounds
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Oxidation of PAHs and their by-products (Polar PACs) in the saturated zone of DNAPL-contaminated sub-soils: Batch and column experiments
HAL CCSD, 2019Co-Authors: Johansson Clotilde, Lorgeoux Catherine, Biache Coralie, Bataillard Philippe, Colombano Stéfan, Joubert Antoine, Pigot Thierry, Faure PierreAbstract:International audienceThe remediation of former industrial sites is, for many reasons (health and environmental impact, land use...) of great concern. Soils encountered at former Coking Plants are often impacted by PAHs inherited from coal-tar storage and dissemination. The present work focuses on improving the effectiveness of in situ chemical oxidation (ISCO) to reduce DNAPL (Dense Non-Aqueous Phase Liquids) remaining after pumping in the saturated zone of the impacted soil. The study is part of the BIOXYVAL project, dedicated to the remediation of contaminated sites by coordi- nating various innovative techniques on a former Coking Plant in the north east of France.The efficiency of seven different chemical oxidants was compared through batch experiments. PAH degradation and formation/ elimination of polar Polycyclic Aromatic Compounds (PACs) were monitored. Polar PACs including oxygen/nitrogen/sulfur- containing PACs, known to be oxidation by-products, have greater mobility in groundwater compared to PAHs and can be more toxic. Conventional oxidants including potassium permanganate, heat-activated persulfate, Fenton-like (activated with magnetite) and Fenton reactions were compared to an innovative and very promising oxidant: potassium ferrates (FeVI). Their reaction products consist of iron hydroxides (FeIII), they have also coagulant properties and are expected to be less harmful to the environment than other end-products (sulfuric acid, manganese salts). Addition- ally, ferrates were used as a Fenton-like catalyst under acidic or neutral conditions.Oxidations were performed on a reference matrix (Fontainebleau sand) spiked with DNAPL sampled at the studied site, at three reaction times (3 h, 1 day and 1 week). Oxidants were applied at one stoichiometric oxidant demand (SOD) deduced from the elemental composition of the DNAPL.Magnetite Fenton-like oxidation applied on spiked sand was not very effective (28.5% degradation of 16-US EPA PAH). The ferrates managed to reach 77.9% degradation of PAH after one week even if the protocol was not optimized. The best oxidants were KMnO4 and heat-activated persulfate, which decreased up to 98% PAH and 96.1% PAH, respectively. Similar results were obtained on the extractable organic matter, representing the whole DNAPL pollution. Good degradation rates were also obtained with classical Fenton reaction and Ferrates/Fenton at pH 3: 93.9% and 89.8% PAH removal respectively. Some O-PACs were formed as degradation by-products in different proportions depending on the oxidants and conditions.Some oxidants are currently optimized in laboratory column tests in order to select the one that will, eventually, be applied at pilot scale. The first step consists in spiking glass beads or soil with DNAPL by drainage/imbibition, followed by water flushing to mimic the removal of the DNAPL fraction by pumping. This will give a residual saturation (Srn) of tar similar to the one obtained on field. Then Ferrates or KMnO4 are flushed through the column. The water quality is monitored throughout the experiment and the PACs remaining in the matrix after treatments are quantified
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Comparative studies of several oxidants for Polycyclic Aromatic Compounds (PAH and Polar PACs) degradation from DNAPL contaminated sub-soils : Batch and column experiments
HAL CCSD, 2019Co-Authors: Johansson Clotilde, Lorgeoux Catherine, Biache Coralie, Bataillard Philippe, Colombano Stéfan, Joubert Antoine, Pigot Thierry, Faure PierreAbstract:International audienceRemediation of industrial wastelands is for many reasons (health and environmental impact, land use...) of great concern. Coking Plants, for instance, may have impacted the soil with PAHs inherited from coal-tar storage and dissemination. This work focuses on improving the effectiveness of in situ chemical oxidation (ISCO) to reduce DNAPL (Dense Non-Aqueous Phase Liquids) remaining after pumping in the saturated zone. The study is part of the BIOXYVAL project, dedicated to the remediation of a former Coking Plant in the north east of France.The efficiency of different oxidants, based on oxido-reduction or radicalar mechanisms, was compared through batch experiments on spiked sand or soil after 7 days. PAH degradation and formation/elimination of polar Polycyclic Aromatic Compounds (PACs), which have a higher mobility in groundwater and can be more toxic than PAHs, were monitored. Column experiments were also studied with some oxidants. Firstly, by spiking glass beads or soil with DNAPL by drainage/imbibition, followed by water flushing to mimic the removal of the DNAPL by pumping. Oxidants were then flushed through the column, and water quality was monitored throughout the experiment.Best degradations (batch) were obtained with permanganate and heat-activated persulfate, which decreased up to 98% and 96.1% PAH, respectively. Good degradation were also obtained with classical Fenton at pH 3 (93.9% PAH removal). However, Magnetite Fenton-like oxidation was not very effective (28.5% degradation of 16-US EPA PAH). All these oxidants were compared to potassium ferrate (FeVI ), an innovative oxidant, mainly applied in water treatment. The results highlighted that ferrate managed to reach 77.9% depletion of PAH in our conditions, and some optimizations were tested (sequential addition, co-oxidation.. O-PACs were formed as intermediate by-products when reaction went through an oxido-reductive pathway. Ferrate and permanganate were continued in laboratory column tests
Coralie Biache - One of the best experts on this subject based on the ideXlab platform.
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fenton like and potassium permanganate oxidations of pah contaminated soils impact of oxidant doses on pah and polar pac polycyclic aromatic compound behavior
Chemosphere, 2019Co-Authors: Marine Boulangé, Coralie Biache, Alain Saada, Catherine Lorgeoux, Pierre FaureAbstract:Potassium permanganate and Fenton-like oxidations were applied on two PAH-contaminated soils collected on former Coking Plant and gas Plant sites. The impact of oxidant dose on the polycyclic aromatic compound (PAC) evolution, including 16 US-EPA PAHs, 11 oxygenated- and 4 nitrogen heterocyclic-PACs (O- and N-PACs) was studied for both treatments. The content of extractable organic matter and PACs was determined prior and after oxidation. Overall, permanganate treatment was more efficient than Fenton-like to decrease the PAH content, this latter being limited by the contamination availability. However, permanganate treatment resulted in incomplete PAH degradation, leading to the formation of O-PACs, that was limited with the application of higher dose. It underlines the importance of the dose and the oxidant type in the selection of oxidation parameters for remediation purpose, as improper use of oxidant can lead to the accumulation of oxidation by-products that could be as toxic as the parent compounds.
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low temperature oxidation of a Coking Plant soil organic matter and its major constituents an experimental approach to simulate a long term evolution
Journal of Hazardous Materials, 2011Co-Authors: Coralie Biache, Pierre Faure, Thierry Ghislain, Laurence MansuyhuaultAbstract:In contaminated soils, several natural processes (biodegradation, oxidation, etc.) can induce degradation of organic pollutants. The aim of this work was to evaluate the impact of an abiotic low-temperature oxidation on a Coking Plant soil and its main organic constituents (coal, coke, coal tar and road asphalts) in order to understand its long term evolution. This natural process was experimentally reproduced by oxidizing the soil and isolated organic matrices at 100 °C during 180 days. The samples were analyzed by total organic carbon measurements and elemental analyses, and the solvent-extractable organic matter was quantified by GC-MS (gas chromatography-mass spectrometry). Oxidation experiments on coal, coal tar and Coking Plant soil samples lead to the decrease in polycyclic aromatic hydrocarbon (PAH) concentrations correlated to an incorporation of oxygen evidenced by the production of oxygenated PAHs. The increasing amount of polar macromolecules and the decrease in solvent-extractable organic matter suggest a molecular growth through ether/ester cross-linking. The chemical environment of organic compounds and the presence of a reactive mineral fraction are important parameters that improve the efficiency of oxidation. This work reveals that abiotic low temperature oxidation, can strongly contribute to pollutant removal especially by a stabilization process and should be considered in the long term evolution of a soil.
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effects of thermal desorption on the composition of two Coking Plant soils impact on solvent extractable organic compounds and metal bioavailability
Environmental Pollution, 2008Co-Authors: Coralie Biache, Pierre Faure, Laurence Mansuyhuault, Colette Munierlamy, Corinne LeyvalAbstract:To evaluate the efficiency and the influence of thermal desorption on the soil organic compartment, contaminated soils from Coking Plant sites (NM and H) were compared to their counterparts treated with thermodesorption. The extractable organic matter, and the metal content and distribution with soil compartments were studied. In both thermodesorbed soils, PAH (polycyclic aromatic hydrocarbon) degradation exceeded 90%. However, the thermal desorption led not only to a volatilization of the organic compounds but also to the condensation of extractable organic matter. The treatments only affected the Fe and Zn distribution within the more stable fractions, whereas the organic compound degradation did not affect their mobility and availability.
Roberto Garcia - One of the best experts on this subject based on the ideXlab platform.
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impact of a semi industrial coke processing Plant in the surrounding surface soil part ii pah content
Fuel Processing Technology, 2012Co-Authors: Roberto Garcia, Antonia M Lopezanton, Montserrat Calvo, Sonia Suárez, Mercedes Diazsomoano, Isabel Suarez Ruiz, Rosa M MartineztarazonaAbstract:Abstract Topsoil samples taken from different areas of a disused experimental Coking Plant were analysed in order to determine their polycyclic aromatic hydrocarbon (PAH) concentration. The variation in concentrations as a function of distance from the Coking oven battery was studied and a reduction in PAH concentration as the distance to the Coking ovens' battery increases was observed. Two exceptions are the area in the vicinity of the tar distillation section of the Plant, with a strong contribution from high temperature tar, and the area where hot coke was taken out of the ovens, with lower concentrations than expected, as a consequence of the significant presence of coke in the soil. Isomer ratios were calculated, indicating that coal is the source of the PAHs in the soil, but also suggesting an influence of transportation fuels. A comparison of the A horizon samples evidences PAH leaching.
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impact of a semi industrial coke processing Plant in the surrounding surface soil part i trace element content
Fuel Processing Technology, 2012Co-Authors: Mercedes Diazsomoano, Antonia M Lopezanton, Montserrat Calvo, Sonia Suárez, Isabel Suarezruiz, Roberto Garcia, Rosa M MartineztarazonaAbstract:Abstract Soil pollution by anthropogenic activities is an important environmental issue especially in industrialized countries. The objective of this study is to evaluate the environmental impact of a coal conversion Plant on the surrounding soil by measuring the spatial distribution of particulate organic carbon and determining the concentration of trace elements (part I) and PAHs (part II). The results indicate that the surface soil presents an increase in the content of organic particulates with values exceeding 80% vol. at the centre of the Coking Plant facilities. The concentrations rapidly decrease as the distance from the Plant increases. Although concentrations of As, Cd, Co, Cr, Cu, Hg, Ni, Pb, and Zn in most cases did not exceed the environmental limits, a clear relationship was established between the presence of some of these elements and the high values of particulate organic carbon content found in the proximity of the Plant.