JFET_V7_N4_RP3 D. Krishna Padma Sree R. Journal on Future Engineering and Technology 2230 – 7184 7 4 27 38 Adsorption, Batch Technique, Isotherms, Kinetics, Limonia Acidissima Hull Powder Chromium has been widely used in various industries like textile, leather, chemical manufacture, metal finishing, paint industry and many other industries. Since hexavalent chromium is a priority toxic, mutagenic and carcinogenic chemical when present in excess, it is very much required to remove chromium from effluents before allowing it to enter any water system or on to land. In the present study, the removal of hexavalent chromium by adsorption on the Limonia Acidissima hull powder as adsorbent has been investigated in the batch experiments. The agitation time, the adsorbent size, adsorbent dosage, initial chromium concentration, temperature and the effect of solution pH are studied. Adsorption mechanism is found to follow Langmuir, Freundlich and Tempkin isotherms. The adsorption behavior is described by a both pseudo first order and second order kinetics. The maximum metal uptake is found to be 20.408 mg/g. May - July 2012 Copyright © 2012 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=1875