The effects of organic acids on the leaching of heavy metals from mine tailings

S. R. Burckhard; A. P. Schwab; Margaret Katherine Banks

doi:10.1016/0304-3894(94)00104-O

The effects of organic acids on the leaching of heavy metals from mine tailings

S. R. Burckhard, A. P. Schwab, Margaret Katherine Banks

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78 Scopus citations

Abstract

A laboratory study was conducted to determine whether the concentration of heavy metals, zinc (Zn), lead (Pb), and cadmium (Cd), in leachate from mine tailings could be affected by the presence of organic acids exuded by plant roots and microbes in the rhizosphere. Geochemical modeling predicted that some organic ligands found in the rhizosphere have the capability to complex and increase the solubility of Zn. These results were confirmed by batch and column studies in which mine tailings were exposed to 0-10000 μM organic acids. The leachate was analyzed for Zn, Pb, and Cd content and for organic acid concentration.

Original language	English (US)
Pages (from-to)	135-145
Number of pages	11
Journal	Journal of Hazardous Materials
Volume	41
Issue number	2-3
DOIs	https://doi.org/10.1016/0304-3894(94)00104-O
State	Published - Jan 1 1995

ASJC Scopus subject areas

Environmental Engineering
Environmental Chemistry
Waste Management and Disposal
Pollution
Health, Toxicology and Mutagenesis

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AB - A laboratory study was conducted to determine whether the concentration of heavy metals, zinc (Zn), lead (Pb), and cadmium (Cd), in leachate from mine tailings could be affected by the presence of organic acids exuded by plant roots and microbes in the rhizosphere. Geochemical modeling predicted that some organic ligands found in the rhizosphere have the capability to complex and increase the solubility of Zn. These results were confirmed by batch and column studies in which mine tailings were exposed to 0-10000 μM organic acids. The leachate was analyzed for Zn, Pb, and Cd content and for organic acid concentration.

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The effects of organic acids on the leaching of heavy metals from mine tailings

Abstract

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