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Potentially toxic element fractionation in technosoils using two sequential extraction schemes.
Environ Sci Pollut Res Int. 2014 Apr; 21(7):5054-65.ES

Abstract

This study reports the chemical fractionation of several potentially toxic elements (Zn, Pb, Cd, As, and Sb) in contaminated technosoils of two former smelting and mining areas using two sequential extraction schemes. The extraction schemes used in this study were the Tessier's scheme and a modified BCR scheme. The fractions were rearranged into four equivalent fractions defined as acid soluble, reducible, oxidizable, and residual to compare the results obtained from two sequential extraction schemes. Surface soils were samples from a waste landfill contaminated with Zn, Pb, and Cd located at Mortagne-du-Nord (MDN; North France) and from a settling basin contaminated with PTE such as As, Pb, and Sb located at La Petite Faye (LPF; Limoges, France). The study of the Zn, Pb, Cd, As, and Sb partitioning in the acid soluble, reducible, oxidizable, and residual fractions of the technosoils revealed that Zn, Cd, and Pb were mainly associated with the acid soluble and reducible fractions for MDN site, while As, Sb, and Pb were associated with residual fraction for LPF site. Fractionation results indicate that the percentages of Zn, Pb, Cd, As, and Sb extracted in Fe-Mn oxide bound fraction of Tessier's scheme were always higher than those extracted by modified BCR scheme. This may be attributed to the stronger Tessier's scheme conditions used to extract this fraction. In contrast the percentages of Zn, Pb, Cd, As, and Sb extracted in the organic fraction of the modified BCR scheme were always higher than those of the Tessier's scheme. The order of mobility of PTE was as follows: Cd > Zn > Pb in MDN site and As > Sb > Pb in LPF site. PTE were distributed in all soil fractions, with the most relevant enrichments in extractable and residual fractions. A significant amount of Cd, Pb, and Zn were rather mobile, which suggests that these elements can be readily available to plants and soil organisms.

Authors+Show Affiliations

CNRS/ISTO Institut des Sciences de la Terre d'Orléans, UMR-CNRS 7327 Campus Géosciences, Université d'Orléans, 1A rue de la Férollerie, 41071, Orléans, France, bhq_chem@yahoo.com.No affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

24371008

Citation

Qasim, Bashar, and Mikael Motelica-Heino. "Potentially Toxic Element Fractionation in Technosoils Using Two Sequential Extraction Schemes." Environmental Science and Pollution Research International, vol. 21, no. 7, 2014, pp. 5054-65.
Qasim B, Motelica-Heino M. Potentially toxic element fractionation in technosoils using two sequential extraction schemes. Environ Sci Pollut Res Int. 2014;21(7):5054-65.
Qasim, B., & Motelica-Heino, M. (2014). Potentially toxic element fractionation in technosoils using two sequential extraction schemes. Environmental Science and Pollution Research International, 21(7), 5054-65. https://doi.org/10.1007/s11356-013-2457-4
Qasim B, Motelica-Heino M. Potentially Toxic Element Fractionation in Technosoils Using Two Sequential Extraction Schemes. Environ Sci Pollut Res Int. 2014;21(7):5054-65. PubMed PMID: 24371008.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Potentially toxic element fractionation in technosoils using two sequential extraction schemes. AU - Qasim,Bashar, AU - Motelica-Heino,Mikael, Y1 - 2013/12/27/ PY - 2013/10/15/received PY - 2013/12/10/accepted PY - 2013/12/28/entrez PY - 2013/12/29/pubmed PY - 2014/7/6/medline SP - 5054 EP - 65 JF - Environmental science and pollution research international JO - Environ Sci Pollut Res Int VL - 21 IS - 7 N2 - This study reports the chemical fractionation of several potentially toxic elements (Zn, Pb, Cd, As, and Sb) in contaminated technosoils of two former smelting and mining areas using two sequential extraction schemes. The extraction schemes used in this study were the Tessier's scheme and a modified BCR scheme. The fractions were rearranged into four equivalent fractions defined as acid soluble, reducible, oxidizable, and residual to compare the results obtained from two sequential extraction schemes. Surface soils were samples from a waste landfill contaminated with Zn, Pb, and Cd located at Mortagne-du-Nord (MDN; North France) and from a settling basin contaminated with PTE such as As, Pb, and Sb located at La Petite Faye (LPF; Limoges, France). The study of the Zn, Pb, Cd, As, and Sb partitioning in the acid soluble, reducible, oxidizable, and residual fractions of the technosoils revealed that Zn, Cd, and Pb were mainly associated with the acid soluble and reducible fractions for MDN site, while As, Sb, and Pb were associated with residual fraction for LPF site. Fractionation results indicate that the percentages of Zn, Pb, Cd, As, and Sb extracted in Fe-Mn oxide bound fraction of Tessier's scheme were always higher than those extracted by modified BCR scheme. This may be attributed to the stronger Tessier's scheme conditions used to extract this fraction. In contrast the percentages of Zn, Pb, Cd, As, and Sb extracted in the organic fraction of the modified BCR scheme were always higher than those of the Tessier's scheme. The order of mobility of PTE was as follows: Cd > Zn > Pb in MDN site and As > Sb > Pb in LPF site. PTE were distributed in all soil fractions, with the most relevant enrichments in extractable and residual fractions. A significant amount of Cd, Pb, and Zn were rather mobile, which suggests that these elements can be readily available to plants and soil organisms. SN - 1614-7499 UR - https://www.unboundmedicine.com/medline/citation/24371008/Potentially_toxic_element_fractionation_in_technosoils_using_two_sequential_extraction_schemes_ DB - PRIME DP - Unbound Medicine ER -