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Assessment of aided phytostabilization of copper-contaminated soil by X-ray PDF Print E-mail

New article from Jurate Kumpienes MCN project at Luleå University of Technology.

Field plots were established at a timber treatment site to evaluate remediation of Cu contaminated

topsoils with aided phytostabilization. Soil containing 2600 mg kg1 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.

Environmental Pollution 159 (2011) 1536e1542
Authors:  Jurate Kumpiene, a, Michel Mench, b, Clémence M, b. Bes, Jeffrey P. Fitts, c

aWaste Science and Technology, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, Luleå SE-97187, Sweden

bUMR BIOGECO INRA 1202, Ecology of Communities, Bordeaux 1 University, Bât B8 RdC Est, Avenue des Facultés, F-33405 Talence, France

c Energy, Environment & National Security, Environmental Sciences Department, Brookhaven National Laboratory, Upton, NY 11973-5000, USA