TY - JOUR
T1 - Influence of Organic Acids on Leaching of Heavy Metals from Contaminated Mine Tailings
AU - Banks, M. K.
AU - Waters, C. Y.
AU - Schwab, A. P.
N1 - Funding Information:
This study was partially supported by the US Environmental Protection Agency under assistance agreement R-815709 to the Hazardous Substance Research Center for US EPA Regions 7 and 8 with headquarters at Kansas State University. This research has not been subjected to the Agency's peer and administrative review, and therefore may not necessarily reflect the views of the Agency and no official endorsement should be inferred.
Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 1994/6/1
Y1 - 1994/6/1
N2 - Runoff and leachate from heavy-metal contaminated mining areas may be reduced through the establishment of vegetation; however, metal concentration in the leachate may increase as a result of acidification and complexation by organic acids generated in the rhizosphere by soil microorganisms and plant roots. In this research, the effects of formic, acetic, and succinic acids on the leaching of zinc from mine waste under saturated pulse flow and constant hydraulic head conditions were evaluated. Under saturated pulse conditions in moderately contaminated soil covered with mine tailings, leachate zinc concentrations decreased as the amendment acid concentration increased. Maintaining constant hydraulic head conditions, highly contaminated mine tailings were leached with neutralized solutions of formate and succinate. The zinc in the leachate of columns receiving 1000 μmol/L of succinate was greater than in the leachate of columns receiving 0 and 250 μmol/L concentrations.
AB - Runoff and leachate from heavy-metal contaminated mining areas may be reduced through the establishment of vegetation; however, metal concentration in the leachate may increase as a result of acidification and complexation by organic acids generated in the rhizosphere by soil microorganisms and plant roots. In this research, the effects of formic, acetic, and succinic acids on the leaching of zinc from mine waste under saturated pulse flow and constant hydraulic head conditions were evaluated. Under saturated pulse conditions in moderately contaminated soil covered with mine tailings, leachate zinc concentrations decreased as the amendment acid concentration increased. Maintaining constant hydraulic head conditions, highly contaminated mine tailings were leached with neutralized solutions of formate and succinate. The zinc in the leachate of columns receiving 1000 μmol/L of succinate was greater than in the leachate of columns receiving 0 and 250 μmol/L concentrations.
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U2 - 10.1080/10934529409376091
DO - 10.1080/10934529409376091
M3 - Article
AN - SCOPUS:0028180814
SN - 1077-1204
VL - 29
SP - 1045
EP - 1056
JO - Journal of Environmental Science and Health . Part A: Environmental Science and Engineering and Toxicology
JF - Journal of Environmental Science and Health . Part A: Environmental Science and Engineering and Toxicology
IS - 5
ER -