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Victor F. Meseguer - One of the best experts on this subject based on the ideXlab platform.

  • Comparative study of six different sludges by sequential speciation of heavy metals
    Bioresource technology, 2007
    Co-Authors: Ana Fuentes, M. Lloréns, J. Sáez, J.f. Ortuño, M.i. Aguilar, Victor F. Meseguer
    Abstract:

    The presence of heavy metals in the sludges produced in wastewater Treatment plants restricts their use for agricultural purposes. This study looks at different types of sludge (aerobic, anaerobic, unstabilised, sludge from a waste Stabilisation pond, sludge from an extended aeration plant and heat treated sludge) and compares the distribution of heavy metals with the Treatment that they have undergone. In addition, the total quantity of metals (Cd, Cr, Cu, Ca, K, Fe, Mg, Ni, Na, Pb and Zn) and some agronomic parameters necessary for characterising a sludge as suitable for use as amendment were determined. The BCR method for heavy metal speciation was followed. Principal component analysis (PCA) was applied in order to obtain more information about metal speciation in the sewage sludges. It was confirmed that the concentration of heavy metals did not exceed the limits set out by European legislation and that the Stabilisation Treatment undergone by the sludges strongly influenced the heavy metal distribution and the phases to which they were associated. The waste Stabilisation pond sludge, which has undergone a higher degree of mineralisation than the others, shows a lower metal bioavailability index since practically all the heavy metals in it are associated to the oxidisable and residual fraction. On the other hand the unstabilised sludge, which, along with that exposed to extended aeration, contains the highest accumulations of heavy metals in the most easily assimilable fractions.

  • Ecotoxicity, phytotoxicity and extractability of heavy metals from different stabilised sewage sludges
    Environmental pollution (Barking Essex : 1987), 2006
    Co-Authors: Ana Fuentes, M. Lloréns, J. Sáez, M.i. Aguilar, A.b. Pérez-marín, J.f. Ortuño, Victor F. Meseguer
    Abstract:

    The presence of heavy metals in the sludges produced in wastewater Treatment plants restricts their use for agricultural purposes. This study compares different types of sludges (aerobic, anaerobic, unstabilised and sludge from a waste Stabilisation pond) in order to assess the extractability of heavy metals using simple extraction, water and DTPA. The Stabilisation Treatment undergone by the sludges influenced the heavy metals extractability. The least mineralised sludges (unstabilised and aerobic) showed higher metal extractability. The sewage sludges were subjected to chemical characterisation and toxicity testing (ecotoxicity and phytotoxicity assays) in absence of substrate, to provide a preliminary assessment of their suitability for land application. The ecotoxicity assays confirmed that no sludge constituted a hazardous waste. The sludge extracts had significant adverse effect on the germination index (GI) of barley (Hordeum vulgare L.) and cress (Lepidium sativum L.), a fact which indicates that some characteristics affected root growth.

  • Phytotoxicity and heavy metals speciation of stabilised sewage sludges.
    Journal of hazardous materials, 2004
    Co-Authors: Ana Fuentes, M. Lloréns, J. Sáez, M.i. Aguilar, J.f. Ortuño, Victor F. Meseguer
    Abstract:

    The presence of heavy metals in the sludges produced in wastewater Treatment restricts plants growth and hence their use for agricultural purposes. This study looks at different types of sludges (aerobic, anaerobic, unstabilised and sludge from a waste Stabilisation pond) and compares the distribution of the heavy metals that they contain according to the Treatment that they have undergone. The sewage sludges were subjected to chemical characterisation and phytotoxicity testing (in absence of substrate) to provide a preliminary assessment of their suitability for land application. In addition, the total quantity of metals (Cd, Cr, Cu, Ca, K, Fe, Mg, Ni, Na, Pb and Zn) was determined. The Community Bureau of Reference (BCR) method for heavy metal speciation was followed. It was confirmed that the total concentration of heavy metals did not exceed the limits set out by European legislation and that the Stabilisation Treatment undergone by the sludges strongly influenced the heavy metal distribution and the phases to which they were associated. The sludge extracts did not exert any significant adverse effect on the relative seed germination (RSG) of barley (Hordeum vulgare L.) or cress (Lepidium sativum L.), although the reduction in germination index (GI) indicates that some characteristics existed did have an adverse effect on root growth.

  • Simple and sequential extractions of heavy metals from different sewage sludges.
    Chemosphere, 2004
    Co-Authors: Ana Fuentes, M. Lloréns, J. Sáez, M.i. Aguilar, J.f. Ortuño, A. Soler, Victor F. Meseguer
    Abstract:

    The presence of heavy metals in the sludges produced in waste-water Treatment plants restricts their use for agricultural purposes. This study looks at different types of sludges (aerobic, anaerobic, unstabilised and sludge from a waste Stabilisation pond) and compares the distribution of the heavy metals they contain according to the Treatment that they have undergone. Some agronomic parameters necessary for characterising a sludge as suitable for use as amendment were determined. The aim of this study is to compare the availability and the localisation of heavy metals in different sewage sludges using simple (water and DTPA) extraction and the BCR (Community Bureau of Reference) sequential extraction procedure. It was confirmed that the total concentration of heavy metals did not exceed the limits set out by European legislation and that the Stabilisation Treatment undergone by the sludges strongly influenced the heavy metal distribution and the phases to which they were associated and their bioavailability level. The DTPA extraction procedure is cheap and easy to perform and the obtained results are similar to those obtained with the sequential procedure.

Ana Fuentes - One of the best experts on this subject based on the ideXlab platform.

  • Comparative study of six different sludges by sequential speciation of heavy metals
    Bioresource technology, 2007
    Co-Authors: Ana Fuentes, M. Lloréns, J. Sáez, J.f. Ortuño, M.i. Aguilar, Victor F. Meseguer
    Abstract:

    The presence of heavy metals in the sludges produced in wastewater Treatment plants restricts their use for agricultural purposes. This study looks at different types of sludge (aerobic, anaerobic, unstabilised, sludge from a waste Stabilisation pond, sludge from an extended aeration plant and heat treated sludge) and compares the distribution of heavy metals with the Treatment that they have undergone. In addition, the total quantity of metals (Cd, Cr, Cu, Ca, K, Fe, Mg, Ni, Na, Pb and Zn) and some agronomic parameters necessary for characterising a sludge as suitable for use as amendment were determined. The BCR method for heavy metal speciation was followed. Principal component analysis (PCA) was applied in order to obtain more information about metal speciation in the sewage sludges. It was confirmed that the concentration of heavy metals did not exceed the limits set out by European legislation and that the Stabilisation Treatment undergone by the sludges strongly influenced the heavy metal distribution and the phases to which they were associated. The waste Stabilisation pond sludge, which has undergone a higher degree of mineralisation than the others, shows a lower metal bioavailability index since practically all the heavy metals in it are associated to the oxidisable and residual fraction. On the other hand the unstabilised sludge, which, along with that exposed to extended aeration, contains the highest accumulations of heavy metals in the most easily assimilable fractions.

  • Ecotoxicity, phytotoxicity and extractability of heavy metals from different stabilised sewage sludges
    Environmental pollution (Barking Essex : 1987), 2006
    Co-Authors: Ana Fuentes, M. Lloréns, J. Sáez, M.i. Aguilar, A.b. Pérez-marín, J.f. Ortuño, Victor F. Meseguer
    Abstract:

    The presence of heavy metals in the sludges produced in wastewater Treatment plants restricts their use for agricultural purposes. This study compares different types of sludges (aerobic, anaerobic, unstabilised and sludge from a waste Stabilisation pond) in order to assess the extractability of heavy metals using simple extraction, water and DTPA. The Stabilisation Treatment undergone by the sludges influenced the heavy metals extractability. The least mineralised sludges (unstabilised and aerobic) showed higher metal extractability. The sewage sludges were subjected to chemical characterisation and toxicity testing (ecotoxicity and phytotoxicity assays) in absence of substrate, to provide a preliminary assessment of their suitability for land application. The ecotoxicity assays confirmed that no sludge constituted a hazardous waste. The sludge extracts had significant adverse effect on the germination index (GI) of barley (Hordeum vulgare L.) and cress (Lepidium sativum L.), a fact which indicates that some characteristics affected root growth.

  • Phytotoxicity and heavy metals speciation of stabilised sewage sludges.
    Journal of hazardous materials, 2004
    Co-Authors: Ana Fuentes, M. Lloréns, J. Sáez, M.i. Aguilar, J.f. Ortuño, Victor F. Meseguer
    Abstract:

    The presence of heavy metals in the sludges produced in wastewater Treatment restricts plants growth and hence their use for agricultural purposes. This study looks at different types of sludges (aerobic, anaerobic, unstabilised and sludge from a waste Stabilisation pond) and compares the distribution of the heavy metals that they contain according to the Treatment that they have undergone. The sewage sludges were subjected to chemical characterisation and phytotoxicity testing (in absence of substrate) to provide a preliminary assessment of their suitability for land application. In addition, the total quantity of metals (Cd, Cr, Cu, Ca, K, Fe, Mg, Ni, Na, Pb and Zn) was determined. The Community Bureau of Reference (BCR) method for heavy metal speciation was followed. It was confirmed that the total concentration of heavy metals did not exceed the limits set out by European legislation and that the Stabilisation Treatment undergone by the sludges strongly influenced the heavy metal distribution and the phases to which they were associated. The sludge extracts did not exert any significant adverse effect on the relative seed germination (RSG) of barley (Hordeum vulgare L.) or cress (Lepidium sativum L.), although the reduction in germination index (GI) indicates that some characteristics existed did have an adverse effect on root growth.

  • Simple and sequential extractions of heavy metals from different sewage sludges.
    Chemosphere, 2004
    Co-Authors: Ana Fuentes, M. Lloréns, J. Sáez, M.i. Aguilar, J.f. Ortuño, A. Soler, Victor F. Meseguer
    Abstract:

    The presence of heavy metals in the sludges produced in waste-water Treatment plants restricts their use for agricultural purposes. This study looks at different types of sludges (aerobic, anaerobic, unstabilised and sludge from a waste Stabilisation pond) and compares the distribution of the heavy metals they contain according to the Treatment that they have undergone. Some agronomic parameters necessary for characterising a sludge as suitable for use as amendment were determined. The aim of this study is to compare the availability and the localisation of heavy metals in different sewage sludges using simple (water and DTPA) extraction and the BCR (Community Bureau of Reference) sequential extraction procedure. It was confirmed that the total concentration of heavy metals did not exceed the limits set out by European legislation and that the Stabilisation Treatment undergone by the sludges strongly influenced the heavy metal distribution and the phases to which they were associated and their bioavailability level. The DTPA extraction procedure is cheap and easy to perform and the obtained results are similar to those obtained with the sequential procedure.

J.f. Ortuño - One of the best experts on this subject based on the ideXlab platform.

  • Comparative study of six different sludges by sequential speciation of heavy metals
    Bioresource technology, 2007
    Co-Authors: Ana Fuentes, M. Lloréns, J. Sáez, J.f. Ortuño, M.i. Aguilar, Victor F. Meseguer
    Abstract:

    The presence of heavy metals in the sludges produced in wastewater Treatment plants restricts their use for agricultural purposes. This study looks at different types of sludge (aerobic, anaerobic, unstabilised, sludge from a waste Stabilisation pond, sludge from an extended aeration plant and heat treated sludge) and compares the distribution of heavy metals with the Treatment that they have undergone. In addition, the total quantity of metals (Cd, Cr, Cu, Ca, K, Fe, Mg, Ni, Na, Pb and Zn) and some agronomic parameters necessary for characterising a sludge as suitable for use as amendment were determined. The BCR method for heavy metal speciation was followed. Principal component analysis (PCA) was applied in order to obtain more information about metal speciation in the sewage sludges. It was confirmed that the concentration of heavy metals did not exceed the limits set out by European legislation and that the Stabilisation Treatment undergone by the sludges strongly influenced the heavy metal distribution and the phases to which they were associated. The waste Stabilisation pond sludge, which has undergone a higher degree of mineralisation than the others, shows a lower metal bioavailability index since practically all the heavy metals in it are associated to the oxidisable and residual fraction. On the other hand the unstabilised sludge, which, along with that exposed to extended aeration, contains the highest accumulations of heavy metals in the most easily assimilable fractions.

  • Ecotoxicity, phytotoxicity and extractability of heavy metals from different stabilised sewage sludges
    Environmental pollution (Barking Essex : 1987), 2006
    Co-Authors: Ana Fuentes, M. Lloréns, J. Sáez, M.i. Aguilar, A.b. Pérez-marín, J.f. Ortuño, Victor F. Meseguer
    Abstract:

    The presence of heavy metals in the sludges produced in wastewater Treatment plants restricts their use for agricultural purposes. This study compares different types of sludges (aerobic, anaerobic, unstabilised and sludge from a waste Stabilisation pond) in order to assess the extractability of heavy metals using simple extraction, water and DTPA. The Stabilisation Treatment undergone by the sludges influenced the heavy metals extractability. The least mineralised sludges (unstabilised and aerobic) showed higher metal extractability. The sewage sludges were subjected to chemical characterisation and toxicity testing (ecotoxicity and phytotoxicity assays) in absence of substrate, to provide a preliminary assessment of their suitability for land application. The ecotoxicity assays confirmed that no sludge constituted a hazardous waste. The sludge extracts had significant adverse effect on the germination index (GI) of barley (Hordeum vulgare L.) and cress (Lepidium sativum L.), a fact which indicates that some characteristics affected root growth.

  • Phytotoxicity and heavy metals speciation of stabilised sewage sludges.
    Journal of hazardous materials, 2004
    Co-Authors: Ana Fuentes, M. Lloréns, J. Sáez, M.i. Aguilar, J.f. Ortuño, Victor F. Meseguer
    Abstract:

    The presence of heavy metals in the sludges produced in wastewater Treatment restricts plants growth and hence their use for agricultural purposes. This study looks at different types of sludges (aerobic, anaerobic, unstabilised and sludge from a waste Stabilisation pond) and compares the distribution of the heavy metals that they contain according to the Treatment that they have undergone. The sewage sludges were subjected to chemical characterisation and phytotoxicity testing (in absence of substrate) to provide a preliminary assessment of their suitability for land application. In addition, the total quantity of metals (Cd, Cr, Cu, Ca, K, Fe, Mg, Ni, Na, Pb and Zn) was determined. The Community Bureau of Reference (BCR) method for heavy metal speciation was followed. It was confirmed that the total concentration of heavy metals did not exceed the limits set out by European legislation and that the Stabilisation Treatment undergone by the sludges strongly influenced the heavy metal distribution and the phases to which they were associated. The sludge extracts did not exert any significant adverse effect on the relative seed germination (RSG) of barley (Hordeum vulgare L.) or cress (Lepidium sativum L.), although the reduction in germination index (GI) indicates that some characteristics existed did have an adverse effect on root growth.

  • Simple and sequential extractions of heavy metals from different sewage sludges.
    Chemosphere, 2004
    Co-Authors: Ana Fuentes, M. Lloréns, J. Sáez, M.i. Aguilar, J.f. Ortuño, A. Soler, Victor F. Meseguer
    Abstract:

    The presence of heavy metals in the sludges produced in waste-water Treatment plants restricts their use for agricultural purposes. This study looks at different types of sludges (aerobic, anaerobic, unstabilised and sludge from a waste Stabilisation pond) and compares the distribution of the heavy metals they contain according to the Treatment that they have undergone. Some agronomic parameters necessary for characterising a sludge as suitable for use as amendment were determined. The aim of this study is to compare the availability and the localisation of heavy metals in different sewage sludges using simple (water and DTPA) extraction and the BCR (Community Bureau of Reference) sequential extraction procedure. It was confirmed that the total concentration of heavy metals did not exceed the limits set out by European legislation and that the Stabilisation Treatment undergone by the sludges strongly influenced the heavy metal distribution and the phases to which they were associated and their bioavailability level. The DTPA extraction procedure is cheap and easy to perform and the obtained results are similar to those obtained with the sequential procedure.

J. Sáez - One of the best experts on this subject based on the ideXlab platform.

  • Comparative study of six different sludges by sequential speciation of heavy metals
    Bioresource technology, 2007
    Co-Authors: Ana Fuentes, M. Lloréns, J. Sáez, J.f. Ortuño, M.i. Aguilar, Victor F. Meseguer
    Abstract:

    The presence of heavy metals in the sludges produced in wastewater Treatment plants restricts their use for agricultural purposes. This study looks at different types of sludge (aerobic, anaerobic, unstabilised, sludge from a waste Stabilisation pond, sludge from an extended aeration plant and heat treated sludge) and compares the distribution of heavy metals with the Treatment that they have undergone. In addition, the total quantity of metals (Cd, Cr, Cu, Ca, K, Fe, Mg, Ni, Na, Pb and Zn) and some agronomic parameters necessary for characterising a sludge as suitable for use as amendment were determined. The BCR method for heavy metal speciation was followed. Principal component analysis (PCA) was applied in order to obtain more information about metal speciation in the sewage sludges. It was confirmed that the concentration of heavy metals did not exceed the limits set out by European legislation and that the Stabilisation Treatment undergone by the sludges strongly influenced the heavy metal distribution and the phases to which they were associated. The waste Stabilisation pond sludge, which has undergone a higher degree of mineralisation than the others, shows a lower metal bioavailability index since practically all the heavy metals in it are associated to the oxidisable and residual fraction. On the other hand the unstabilised sludge, which, along with that exposed to extended aeration, contains the highest accumulations of heavy metals in the most easily assimilable fractions.

  • Ecotoxicity, phytotoxicity and extractability of heavy metals from different stabilised sewage sludges
    Environmental pollution (Barking Essex : 1987), 2006
    Co-Authors: Ana Fuentes, M. Lloréns, J. Sáez, M.i. Aguilar, A.b. Pérez-marín, J.f. Ortuño, Victor F. Meseguer
    Abstract:

    The presence of heavy metals in the sludges produced in wastewater Treatment plants restricts their use for agricultural purposes. This study compares different types of sludges (aerobic, anaerobic, unstabilised and sludge from a waste Stabilisation pond) in order to assess the extractability of heavy metals using simple extraction, water and DTPA. The Stabilisation Treatment undergone by the sludges influenced the heavy metals extractability. The least mineralised sludges (unstabilised and aerobic) showed higher metal extractability. The sewage sludges were subjected to chemical characterisation and toxicity testing (ecotoxicity and phytotoxicity assays) in absence of substrate, to provide a preliminary assessment of their suitability for land application. The ecotoxicity assays confirmed that no sludge constituted a hazardous waste. The sludge extracts had significant adverse effect on the germination index (GI) of barley (Hordeum vulgare L.) and cress (Lepidium sativum L.), a fact which indicates that some characteristics affected root growth.

  • Phytotoxicity and heavy metals speciation of stabilised sewage sludges.
    Journal of hazardous materials, 2004
    Co-Authors: Ana Fuentes, M. Lloréns, J. Sáez, M.i. Aguilar, J.f. Ortuño, Victor F. Meseguer
    Abstract:

    The presence of heavy metals in the sludges produced in wastewater Treatment restricts plants growth and hence their use for agricultural purposes. This study looks at different types of sludges (aerobic, anaerobic, unstabilised and sludge from a waste Stabilisation pond) and compares the distribution of the heavy metals that they contain according to the Treatment that they have undergone. The sewage sludges were subjected to chemical characterisation and phytotoxicity testing (in absence of substrate) to provide a preliminary assessment of their suitability for land application. In addition, the total quantity of metals (Cd, Cr, Cu, Ca, K, Fe, Mg, Ni, Na, Pb and Zn) was determined. The Community Bureau of Reference (BCR) method for heavy metal speciation was followed. It was confirmed that the total concentration of heavy metals did not exceed the limits set out by European legislation and that the Stabilisation Treatment undergone by the sludges strongly influenced the heavy metal distribution and the phases to which they were associated. The sludge extracts did not exert any significant adverse effect on the relative seed germination (RSG) of barley (Hordeum vulgare L.) or cress (Lepidium sativum L.), although the reduction in germination index (GI) indicates that some characteristics existed did have an adverse effect on root growth.

  • Simple and sequential extractions of heavy metals from different sewage sludges.
    Chemosphere, 2004
    Co-Authors: Ana Fuentes, M. Lloréns, J. Sáez, M.i. Aguilar, J.f. Ortuño, A. Soler, Victor F. Meseguer
    Abstract:

    The presence of heavy metals in the sludges produced in waste-water Treatment plants restricts their use for agricultural purposes. This study looks at different types of sludges (aerobic, anaerobic, unstabilised and sludge from a waste Stabilisation pond) and compares the distribution of the heavy metals they contain according to the Treatment that they have undergone. Some agronomic parameters necessary for characterising a sludge as suitable for use as amendment were determined. The aim of this study is to compare the availability and the localisation of heavy metals in different sewage sludges using simple (water and DTPA) extraction and the BCR (Community Bureau of Reference) sequential extraction procedure. It was confirmed that the total concentration of heavy metals did not exceed the limits set out by European legislation and that the Stabilisation Treatment undergone by the sludges strongly influenced the heavy metal distribution and the phases to which they were associated and their bioavailability level. The DTPA extraction procedure is cheap and easy to perform and the obtained results are similar to those obtained with the sequential procedure.

M. Lloréns - One of the best experts on this subject based on the ideXlab platform.

  • Comparative study of six different sludges by sequential speciation of heavy metals
    Bioresource technology, 2007
    Co-Authors: Ana Fuentes, M. Lloréns, J. Sáez, J.f. Ortuño, M.i. Aguilar, Victor F. Meseguer
    Abstract:

    The presence of heavy metals in the sludges produced in wastewater Treatment plants restricts their use for agricultural purposes. This study looks at different types of sludge (aerobic, anaerobic, unstabilised, sludge from a waste Stabilisation pond, sludge from an extended aeration plant and heat treated sludge) and compares the distribution of heavy metals with the Treatment that they have undergone. In addition, the total quantity of metals (Cd, Cr, Cu, Ca, K, Fe, Mg, Ni, Na, Pb and Zn) and some agronomic parameters necessary for characterising a sludge as suitable for use as amendment were determined. The BCR method for heavy metal speciation was followed. Principal component analysis (PCA) was applied in order to obtain more information about metal speciation in the sewage sludges. It was confirmed that the concentration of heavy metals did not exceed the limits set out by European legislation and that the Stabilisation Treatment undergone by the sludges strongly influenced the heavy metal distribution and the phases to which they were associated. The waste Stabilisation pond sludge, which has undergone a higher degree of mineralisation than the others, shows a lower metal bioavailability index since practically all the heavy metals in it are associated to the oxidisable and residual fraction. On the other hand the unstabilised sludge, which, along with that exposed to extended aeration, contains the highest accumulations of heavy metals in the most easily assimilable fractions.

  • Ecotoxicity, phytotoxicity and extractability of heavy metals from different stabilised sewage sludges
    Environmental pollution (Barking Essex : 1987), 2006
    Co-Authors: Ana Fuentes, M. Lloréns, J. Sáez, M.i. Aguilar, A.b. Pérez-marín, J.f. Ortuño, Victor F. Meseguer
    Abstract:

    The presence of heavy metals in the sludges produced in wastewater Treatment plants restricts their use for agricultural purposes. This study compares different types of sludges (aerobic, anaerobic, unstabilised and sludge from a waste Stabilisation pond) in order to assess the extractability of heavy metals using simple extraction, water and DTPA. The Stabilisation Treatment undergone by the sludges influenced the heavy metals extractability. The least mineralised sludges (unstabilised and aerobic) showed higher metal extractability. The sewage sludges were subjected to chemical characterisation and toxicity testing (ecotoxicity and phytotoxicity assays) in absence of substrate, to provide a preliminary assessment of their suitability for land application. The ecotoxicity assays confirmed that no sludge constituted a hazardous waste. The sludge extracts had significant adverse effect on the germination index (GI) of barley (Hordeum vulgare L.) and cress (Lepidium sativum L.), a fact which indicates that some characteristics affected root growth.

  • Phytotoxicity and heavy metals speciation of stabilised sewage sludges.
    Journal of hazardous materials, 2004
    Co-Authors: Ana Fuentes, M. Lloréns, J. Sáez, M.i. Aguilar, J.f. Ortuño, Victor F. Meseguer
    Abstract:

    The presence of heavy metals in the sludges produced in wastewater Treatment restricts plants growth and hence their use for agricultural purposes. This study looks at different types of sludges (aerobic, anaerobic, unstabilised and sludge from a waste Stabilisation pond) and compares the distribution of the heavy metals that they contain according to the Treatment that they have undergone. The sewage sludges were subjected to chemical characterisation and phytotoxicity testing (in absence of substrate) to provide a preliminary assessment of their suitability for land application. In addition, the total quantity of metals (Cd, Cr, Cu, Ca, K, Fe, Mg, Ni, Na, Pb and Zn) was determined. The Community Bureau of Reference (BCR) method for heavy metal speciation was followed. It was confirmed that the total concentration of heavy metals did not exceed the limits set out by European legislation and that the Stabilisation Treatment undergone by the sludges strongly influenced the heavy metal distribution and the phases to which they were associated. The sludge extracts did not exert any significant adverse effect on the relative seed germination (RSG) of barley (Hordeum vulgare L.) or cress (Lepidium sativum L.), although the reduction in germination index (GI) indicates that some characteristics existed did have an adverse effect on root growth.

  • Simple and sequential extractions of heavy metals from different sewage sludges.
    Chemosphere, 2004
    Co-Authors: Ana Fuentes, M. Lloréns, J. Sáez, M.i. Aguilar, J.f. Ortuño, A. Soler, Victor F. Meseguer
    Abstract:

    The presence of heavy metals in the sludges produced in waste-water Treatment plants restricts their use for agricultural purposes. This study looks at different types of sludges (aerobic, anaerobic, unstabilised and sludge from a waste Stabilisation pond) and compares the distribution of the heavy metals they contain according to the Treatment that they have undergone. Some agronomic parameters necessary for characterising a sludge as suitable for use as amendment were determined. The aim of this study is to compare the availability and the localisation of heavy metals in different sewage sludges using simple (water and DTPA) extraction and the BCR (Community Bureau of Reference) sequential extraction procedure. It was confirmed that the total concentration of heavy metals did not exceed the limits set out by European legislation and that the Stabilisation Treatment undergone by the sludges strongly influenced the heavy metal distribution and the phases to which they were associated and their bioavailability level. The DTPA extraction procedure is cheap and easy to perform and the obtained results are similar to those obtained with the sequential procedure.