Abstrakt

Removal of Hexavalent Chromium From Simulated Waste Water Using Rice Husk Ash as Carbon Adsorbent

Anand S A , Nagarajappa D P , Sanjeev S , Ramu S

Chromium, essentially exists in two oxidation forms namely Cr(III) and Cr(VI). With comparison trivalent Cromium , Cr(VI) is reported to have toxic effect on humans and it is considered to be genotoxic and carcinogenic in nature. Present study deals with preparation of Rick husk ash , preparation of synthetic Cr(VI) Solutions like 10 mg/L, 20 mg/L,30 mg/L, 40mg/L and 50 mg/L and its adsorption. Different dosages of rice husk ash from 1 mg/L to 10 mg/L were used by varying the pH 2, pH4, pH6, pH8, pH10 for all concentrations of Chromium solutions. Finally dosage of Rice husk ash, pH, and Reaction time were optimized to get the maximum removal of Cr(VI) from aqueous solutions. Adsorption isotherms were analyzed to know the better performance of the Rice husk ash.