Journal of Chemical and Pharmaceutical Research (ISSN : 0975-7384)

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Original Articles: 2015 Vol: 7 Issue: 12

Removal of toxic metal chromium(VI) from industrial wastewater using activated carbon as adsorbent

Abstract

Removal of toxic metals from industrial waste water is essential for the standpoint of environmental pollution control. Among all toxic heavy metals mercury, lead, chromium and cadmium are in the limelight due to their major impact on environment. Chromium(VI) is one of them and permissible limit in drinking water is 0.05 mg/l and when present above this limit it causes various types of acute and chronic disorder. The toxicity of Cr(VI) is higher than Cr(III). Many physical-chemical wastewater treatment process viz, oxidation-reduction, precipitation, ion exchange and liquid membrane are being used. However, all these have the limitation of technical and /or economical constraints. Adsorption is a viable and attractive method for the removal of metal from the effluents due to its high efficiency, easy handling and less expensive. The adsorption process is being widely used by various researchers for the removal of heavy metals from waste streams and activated carbon is frequently used as an adsorbent. In recent years, the need for safe and economical methods for the elimination of heavy metals from contaminated waters has necessitated research interest towards the production of low cost alternatives to commercially available activated carbon. A carbonaceous adsorbent prepared from an indigenous waste by acid treatment was tested for its efficiency in removing chromium ion. The parameters studied include agitation time, initial chromium ion concentration, carbon dosage, pH and temperature.