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Removal of Cr(VI) from Aqueous Solution Using Activated Cow Dung Carbon

✍ Scribed by Dharani Dhar Das; Ranjit Mahapatra; Jyotsnamayee Pradhan; Surendra Nath Das; Ravindra Sing Thakur

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
75 KB
Volume
232
Category
Article
ISSN
0021-9797

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✦ Synopsis

Removal of hexavalent chromium from aqueous medium by using activated cow dung carbon was studied. Cow dung was carbonized and activated by treating with concentrated H 2 SO 4 followed by heating for 24 h at 120 β€’ C. The extent of adsorption was studied as a function of pH, contact time, amount of adsorbent, concentration of adsorbate, and temperature. At lower pH (<3.5), the prepared sorbent was capable of removing ∼90% Cr(VI) at 5 ppm concentration from aqueous synthetic solution. The dynamics of migration of the sorbate ions from the bulk onto the sorbent surface was studied and the results obtained under various experimental conditions were found to follow standard adsorption isotherms. The reaction kinetics was found to be of first order.

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