REMEDIATION OF NITRATE FROM AQUEOUS SOLUTIONS USING RICE HUSK AS A BIOSORBENTVASIM A. KHATIKAbstract The remediation of nitrates from contaminated water by biosorption can be an important alternative for nitrate removal from contaminated waters in rural region. In this study, efficiency of rice husk was tested for the removal of nitrates ions (NO3 -) from nitrate contaminated water samples. The experiments were conducted in long cylindrical columns covering process parameters that include pH, initial concentration, and height of biosorption bed. The nitrate removal ranged from the lowest 23.9 % to the highest 53.7 %. The operating parameters pH, initial concentrations and bed height, have increased the removal by 23.8 % thus showing positive effect on nitrate remediation process. The biosorption studies on nitrate remediation from contaminated waters have shown the rice husk as a potential biosorbent for nitrate removal. From the results it can be concluded that rice husk holds a significant potential to be used as an effective biosorbent for the removal of nitrates from contaminated waters. However, the overall biosorptive capacity of rice husk can be increased further and large scale application for commercial viability of rice husk is recommended to be tested.
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