COMPARATIVE REMOVAL OF CHROMIUM TOXIC METAL FROM WATER USING VERMICULITE BLENDED CHITOSAN COATED CARBON BIOPOLYMER COMPOSITES

A specific amount of chromium is required for normal body functions. Its higher concentration it may cause toxicity, including liver and kidney problems-genotoxic carcinogen. Hence it should be removed from waste water before discharging it. In this study chitosan blended vermiculite and chitosan coated carbon based biosorbents were prepared and used to remove chromium heavy metal ion (Cr6+) from water by changing various parameters such as adsorbent dosage, contact time and pHBoth the adsorbents exhibit maximum chromium ion removal at optimum pH=5, adsorbent dose 5g/100 ml and contact time 300 min. Sorption data were analyzed by sorption isotherm and kinetic study and thus, data well fitted with Frenundlich's isotherm model and follows pseudo-second order kinetics.