Removing heavy metals from polluted surface water with a tannin-based flocculant agent

Many environmental and health problems come from the presence of metals in surface water. Effectiveness of a new commercial tannin-based flocculant has been tested in order to remove Zn 2+, Ni 2+ and Cu 2+ by coagulation–flocculation process. pH has been adjusted in order to evaluate the real heavy...

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Bibliographic Details
Published in:Journal of hazardous materials 2009-06, Vol.165 (1), p.1215-1218
Main Authors: BELTRAN HEREDIA, J, SANCHEZ MARTIN, J
Format: Article
Language:English
Subjects:
Applied sciences
Biological and physicochemical phenomena
Coagulation–flocculation
Continental surface waters
Exact sciences and technology
Flocculation
Heavy metal removal
Hydrogen-Ion Concentration
Metals, Heavy - isolation & purification
Natural water pollution
Pollution
Surface water contamination
Tannins
Tannins - chemistry
Water Pollutants, Chemical - isolation & purification
Water Purification - methods
Water treatment and pollution
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Summary:Many environmental and health problems come from the presence of metals in surface water. Effectiveness of a new commercial tannin-based flocculant has been tested in order to remove Zn 2+, Ni 2+ and Cu 2+ by coagulation–flocculation process. pH has been adjusted in order to evaluate the real heavy metal removal due just to flocculant effect and not to hydroxide precipitation. At least a 75% of metal removal has been reported in every case, depending on pH value. Flocculant doses have been reported to be about 100–150 ppm.
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2008.09.104