POTENTIAL BIOSORPTION OF CHROMIUM (VI) FROM POLLUTED GROUND WATERS BY LIMONIA ACIDISSIMA BARKSUPRIYA SINGH, ALKA TRIPATHI AND S.K. SRIVASTAVA
The toxic metals present in industrial wastes dumped on surface / sub surface have contaminated water resources leading to severe threat to flora, fauna and ecosystem. The current investigation aims to remove hazardous chromium (VI) from contaminated ground water using Limonia tree bark as biosorbent from UPSIDC, Unnao and Kanpur, Uttar Pradesh rural areas to use for drinking. The biosorbent Limonia bark was experimented with retention time, sorbent dosage, temperature, chromium concentration and hydrogen ion activity and found potential adsorption capacity of 23 in neutral and 45 mgg-1 in acidic medium. The adsorption was found maximum (90%) at low pH increasing with increasing biosorbent concentration (79%), temperature (49%) and decreasing (46%) with expanding Cr (VI) quantity. The biosorption has been tested with Linear, chemist and Freundlich isotherms. The study reveals that Limonia bark can be used as potential low cost biosorbent for treating chromium contaminated waters using a pinch (0.5 mg/L) of biosorbent to get potable drinking water in the effected rural areas.
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