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Kinetic extractions to assess mobilization of Zn, Pb, Cu, and Cd in a metal-contaminated soil: EDTA vs. citrate.
| Content Provider | Hyper Articles en Ligne (HAL) |
|---|---|
| Author | Labanowski, Jérôme Monna, Fabrice Bermond, Alain Cambier, Philippe Fernandez, Christelle Lamy, Isabelle van Oort, Folkert |
| Copyright Year | 2008 |
| Abstract | Kinetic EDTA and citrate extractions were used to mimic metal mobilization in a soil contaminated by metallurgical fallout. Modeling of metal removal rates vs. time distinguished two metal pools: readily labile (QM1) and less labile (QM2). In citrate extractions, total extractability (QM1 + QM2) of Zn and Cd was proportionally higher than for Pb and Cu. Proportions of Pb and Cu extracted with EDTA were three times higher than when using citrate. We observed similar QM1/QM2 ratios for Zn and Cu regardless of the extractant, suggesting comparable binding energies to soil constituents. However, for Pb and Cd, more heterogeneous binding energies were hypothesized to explain different kinetic extraction behaviors. Proportions of citrate-labile metals were found consistent with their short-term, in-situ mobility assessed in the studied soil, i.e., metal amount released in the soil solution or extracted by cultivated plants. Kinetic EDTA extractions were hypothesized to be more predictive for long-term metal migration with depth. |
| Related Links | https://hal.science/hal-01192014/file/Environ.%20Pollut.%282008%29152%283%29693-701_1.pdf |
| ISSN | 02697491 |
| e-ISSN | 18736424 |
| DOI | 10.1016/j.envpol.2007.06.054 |
| Journal | Environmental Pollution |
| Issue Number | 3 |
| Volume Number | 152 |
| Language | English |
| Publisher | HAL CCSD Elsevier |
| Publisher Date | 2008-01-01 |
| Access Restriction | Open |
| Subject Keyword | CITRATE KINETIC EXTRACTION MODELING HEAVY METALS METAL MOBILITY EDTA Environment and Society Environmental Sciences |
| Content Type | Text |
| Resource Type | Article |
| Subject | Pollution Health, Toxicology and Mutagenesis Medicine Toxicology Environmental Science |
