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Metal binding in estuarine humic and fulvic acids: FTIR analysis of humic acid-metal complexes



Metal binding in estuarine humic and fulvic acids: FTIR analysis of humic acid-metal complexes



Environmental Technology 19(9): 923-931



Humic and fulvic acids isolated from salt marsh estuaries of the southeastern USA had copper binding capacities (CuBC) of 0.16-0.26 micro g atm Cu2+/mg humic acid and 0.17-0.24 micro g atm Cu2+/mg fulvic acid. Competitive reactions of humic substances with alkaline earth elements Ca2+ and Mg2+ reduced the CuBC by only 11% for fulvic acids and by 17% for humic acids. Competition with the trivalent metal ions Al3+ and Fe3+ reduced the CuBC in humic substances by 30-40%.

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Accession: 003199601

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DOI: 10.1080/09593331908616750



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