Comparison of EDTA, HCl and sequential extraction procedures, for selected metals (Cu, Mn, Pb, Zn), in soils, riverine and marine sediments
| Autor: | Lydia Leleyter, Laetitia Biree, C. Rousseau, Fabienne Baraud |
|---|---|
| Přispěvatelé: | Aliments Bioprocédés Toxicologie Environnements (ABTE), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU), Centre Michel de Boüard - Centre de recherches archéologiques et historiques anciennes et médiévales (CRAHAM), Normandie Université (NU)-Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Native metal
010504 meteorology & atmospheric sciences Chemistry Extraction (chemistry) 010501 environmental sciences 01 natural sciences 6. Clean water Metal Environmental risk Geochemistry and Petrology visual_art Environmental chemistry Soil water [SDE]Environmental Sciences visual_art.visual_art_medium [CHIM]Chemical Sciences Economic Geology Leaching (metallurgy) ComputingMilieux_MISCELLANEOUS 0105 earth and related environmental sciences |
| Zdroj: | Journal of Geochemical Exploration Journal of Geochemical Exploration, Elsevier, 2012, 116-117, pp.51-59. ⟨10.1016/j.gexplo.2012.03.006⟩ |
| ISSN: | 0375-6742 |
| DOI: | 10.1016/j.gexplo.2012.03.006⟩ |
| Popis: | article i nfo Knowledge of the total concentration of metals in soils and sediments is frequently insufficient to ascertain environmental risk. Simple and sequential extractions are useful tools for estimating the mobility of metals. Many chemical extraction procedures have been proposed in the literature. This study compares the efficiency of three chemical extractions (two single procedures, using EDTA or HCl as reactant, and a sequential chemical extraction) on soils, riverine, estuarine and marine sediments. In the case of riverine sediments and soils, similar results are observed with 0.05 mol.L −1 EDTA or 0.2 mol.L −1 HCl extractions, whereas 0.2 mol.L −1 HCl is inefficient for marine or estuarine samples. Comparison of the results obtained for the various samples, suggests that it is necessary to use a unique procedure for all the samples. The use of 0.05 mol.L −1 EDTA rather than 0.2 mol.L −1 HCl, as reactant for the single extractions is recommended. The applied sequential extraction procedure is more aggressive than EDTA (except to evaluate Pb mobility for some samples). Assuming that the metal enrichments are mainly of anthropogenic origin and that these metals are of higher mobility, compared to native metals, it is concluded that, for estimation of metal mobility, EDTA leaching is better adapted for Pb, whereas the sequential extraction procedure is better suited for Zn and Cu. |
| Databáze: | OpenAIRE |
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