Role of humic acid entrapped calcium alginate beads in removal of heavy metals

Most of the available techniques for removal of heavy metals from solution such as leachates from waste sites are very expensive. The technique described in this paper is designed to study the removal of humic acid by alginate beads and the subsequent binding of the metals within the beads thus decr...

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Bibliographic Details
Published in:Journal of hazardous materials 2003-03, Vol.98 (1), p.177-181
Main Authors: Pandey, A.K., Pandey, S.D., Misra, Virendra, Devi, Santha
Format: Article
Language:English
Subjects:
Alginates
Applied sciences
Calcium alginate beads
Disposal
Environmental Pollution - prevention & control
Exact sciences and technology
Fluorescence intensity/quenching
General purification processes
Glucuronic Acid
Hazardous Waste
Hexuronic Acids
Humic acid
Humic Substances
Industrial Waste
Metal removal
Metals, Heavy
Microscopy, Fluorescence
Pollution
Wastewaters
Water treatment and pollution
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Summary:Most of the available techniques for removal of heavy metals from solution such as leachates from waste sites are very expensive. The technique described in this paper is designed to study the removal of humic acid by alginate beads and the subsequent binding of the metals within the beads thus decreasing the leachability of heavy metals from a hazardous waste site. The entry of 500 mg/l humic acid into 3% calcium alginate beads in 24 h showed a distinct fluorescence as compared to the fluorescence shown by the entry of 100 and 250 mg/l of humic acid into alginate beads. Further, on treatment of calcium alginate beads containing 500 mg/l humic acid with metals such as Cu, Mn, Zn, Cr and Fe, quenching of fluorescence was noticed, which was maximum with Cu and minimum with Fe.
ISSN:0304-3894
1873-3336
DOI:10.1016/S0304-3894(02)00316-3