TY - JOUR
T1 - Chelant-aided enhancement of lead mobilization in residential soils
AU - Sarkar, Dibyendu
AU - Andra, Syam S.
AU - Saminathan, Sumathi K.M.
AU - Datta, Rupali
PY - 2008/12
Y1 - 2008/12
N2 - Chelation of metals is an important factor in enhancing solubility and hence, availability to plants to promote phytoremediation. We compared the effects of two chelants, namely, ethylenediaminetetraacetic acid (EDTA) and ethylenediaminedisuccinic acid (EDDS) in enhancing mobilized lead (Pb) in Pb-based paint contaminated residential soils collected from San Antonio, Texas and Baltimore, Maryland. Batch incubation studies were performed to investigate the effectiveness of the two chelants in enhancing mobilized Pb, at various concentrations and treatment durations. Over a period of 1 month, the mobilized Pb pool in the San Antonio study soils increased from 52 mg kg-1 to 287 and 114 mg kg-1 in the presence of 15 mM kg-1 EDTA and EDDS, respectively. Stepwise linear regression analysis demonstrated that pH and organic matter content significantly affected the mobilized Pb fraction. The regression models explained a large percentage, from 83 to 99%, of the total variation in mobilized Pb concentrations.
AB - Chelation of metals is an important factor in enhancing solubility and hence, availability to plants to promote phytoremediation. We compared the effects of two chelants, namely, ethylenediaminetetraacetic acid (EDTA) and ethylenediaminedisuccinic acid (EDDS) in enhancing mobilized lead (Pb) in Pb-based paint contaminated residential soils collected from San Antonio, Texas and Baltimore, Maryland. Batch incubation studies were performed to investigate the effectiveness of the two chelants in enhancing mobilized Pb, at various concentrations and treatment durations. Over a period of 1 month, the mobilized Pb pool in the San Antonio study soils increased from 52 mg kg-1 to 287 and 114 mg kg-1 in the presence of 15 mM kg-1 EDTA and EDDS, respectively. Stepwise linear regression analysis demonstrated that pH and organic matter content significantly affected the mobilized Pb fraction. The regression models explained a large percentage, from 83 to 99%, of the total variation in mobilized Pb concentrations.
KW - Chelating agents
KW - Lead-based paint
KW - Mobilized lead
KW - Phytoremediation
KW - Residential soils
KW - Soil properties
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U2 - 10.1016/j.envpol.2008.04.004
DO - 10.1016/j.envpol.2008.04.004
M3 - Article
C2 - 18479792
AN - SCOPUS:55649083539
SN - 0269-7491
VL - 156
SP - 1139
EP - 1148
JO - Environmental Pollution
JF - Environmental Pollution
IS - 3
ER -