Stepwise Sequential Extraction of As‐, Cu‐, and Pb‐Contaminated Paddy Soil

Kim, Woo-Seung; Yoo, Jong‐Shin; Jeon, Eun-Ki; Yang, Jung‐Seok; Baek, Kitae

doi:10.1002/clen.201300355

Cited by 5 publications

(1 citation statement)

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“…EDTA soil application has the potential to increase the mobility of both trivalent and divalent metals by changing their chemical speciation. It was shown by fractionation analysis that EDTA soil application extracted Fe from Fe/Mn‐oxides and ‐hydroxides and simultaneously released Cu and Pb into the aqueous phase in a contaminated soil ( Kim et al, ). Also Cornu et al () observed a change in the chemical speciation of metals in a contaminated soil when EDTA was applied.…”

Section: Introductionmentioning

confidence: 99%

Influence of graded EDTA applications on mobilization and translocation of trace elements—a soil column experiment

Bloem

Vogler

2017

J. Plant Nutr. Soil Sci.

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Increasing concerns about potential environmental effects of ethylenediaminetetraacetic acid (EDTA) accumulation in soils require better understanding of its behavior and its effect on trace element mobilization. In this study we investigated the effect of EDTA on soil trace element mobilization in undisturbed soil columns taken from a heavy metal contaminated field. The columns were leached by EDTA solutions of different concentrations under unsaturated, steady‐state conditions. The transport of trace elements (Cd, Co, Cr, Cu, Fe, Mn, Mo, Ni, Pb, Sn, Zn) and EDTA was monitored by regularly collecting the leachates. After the termination of the leaching experiment the soil columns were divided into 5 layers to determine trace elements and EDTA concentrations in the soil. The results revealed that the soil analysis alone was not suitable to infer mobilization or immobilization patterns in relation to the EDTA concentration, as the mobilized fraction was too small in relation to the total trace metal concentrations in the soil. Analysis of the leachates displayed that after 2–4 pore volumes the EDTA output concentration reached about 80% of the input concentration. The trace element concentrations in the leachates showed that some elements were mobilized by EDTA (Cd, Cu, Fe, Pb, Co, Ni, Zn) while others were immobilized (Mn, Cr, Mo, Sn) in the soil columns after EDTA application.

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Section: Introductionmentioning

confidence: 99%