Assessment of aided phytostabilization of copper-contaminated soil by X-ray absorption spectroscopy and chemical extractions
Language
en
Article de revue
This item was published in
Environmental Pollution. 2011, vol. 159, n° 6, p. 1536-1542
Elsevier
English Abstract
Field plots were established at a timber treatment site to evaluate remediation of Cu contaminated topsoils with aided phytostabilization. Soil containing 2600 mg kg−1 Cu was amended with a combination of 5 wt% compost and ...Read more >
Field plots were established at a timber treatment site to evaluate remediation of Cu contaminated topsoils with aided phytostabilization. Soil containing 2600 mg kg−1 Cu was amended with a combination of 5 wt% compost and 2 wt% iron grit, and vegetated. Sequential extraction was combined with extended X-ray absorption fine structure (EXAFS) spectroscopy to correlate changes in Cu distribution across five fractions with changes in the predominant Cu compounds two years after treatment in parallel treated and untreated field plots. Exchangeable Cu dominated untreated soil, most likely as Cu(II) species non-specifically bound to natural organic matter. The EXAFS spectroscopic results are consistent with the sequential extraction results, which show a major shift in Cu distribution as a result of soil treatment to the fraction bound to poorly crystalline Fe oxyhydroxides forming binuclear inner-sphere complexes.Read less <
Keywords
COPPER(II)
EXAFS
CONTAMINATION DU SOL
English Keywords
COMPOST
IN SITU STABILIZATION
SEQUENTIAL EXTRACTION
ZEROVALENT IRON
Origin
Hal imported