Optimization studies on electrochemical and biosorption treatment of effluent containing nitro benzene by RSM

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Research Paper 01/02/2013
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Optimization studies on electrochemical and biosorption treatment of effluent containing nitro benzene by RSM

P. SivaKumar, D. Prabhakaran, T. Kannadasan, S. Karthikeyan
Int. J. Biosci.3( 2), 1-7, February 2013.
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Abstract

A novel process combining Electrochemical Oxidation and Biosorption treatment was presented for
Nitrobenzene abatement. The electrochemical oxidation was investigated batch-wise in the presence of NaCl (2gL-1) electrolyte with lead as anode and copper as cathode electrodes. The conditions were optimized using response surface methodology (RSM), which result in 76.4% reduction of COD was found to be maximum and the optimum conditions were satisfied at current density 3.56 A dm-2, time 3 hours, flow rate 40 L hr -1, volume 9 L occur at minimum power consumption of 30.3 kWhr / kg COD. It is followed by biosorption treatment in the presence of biosorbents such as maize and rice stems at 15 g L-1. From this study it was observed that the maximum % of COD reduction was 97.7 % for the optimized time 4 days and volume 6 L for pretreated effluent containing nitrobenzene.

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