Pollution Research Paper

Vol.31, Issue 1, 2012; Page No.(111-116)

REMOVAL OF SOME HEAVY METALS FROM AQUEOUS EFFLUENTS BY ADSORPTION ON EGG SHELLS

K.S. GEETHA AND S.L. BELAGALI

Abstract

The application of adsorption techniques for the removal of heavy metals is quite popular and activated carbon is universally used as an adsorbent. However, higher costs of its preparation and regeneration have led to a search for alternative sorbents, especially in the developing countries. A number of sorbents are used to remove metals by adsorption from industrial effluents, like rice husks, barks, cotton wastes, coal, clay, hair, saw dust etc. Therefore, as an alternative, Egg Shell Carbon (ESC), a low cost sorbent was used in the present work, for the removal of heavy metals from aqueous effluents. The results of the batch adsorption studies indicate that, the efficiency of heavy metals removal by egg shell carbon is comparable to that of commercially available activated carbon. The parameters affecting the sorption process are also discussed in the present paper.

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