Abstract
The aim of this study is to explore the effectiveness of Gondwana shale for the removal of phenol from coke-oven wastewater. The phenol concentration in coke-oven plant effluent varies from 2 mg/L to 10 mg/L depending on the extent of final treatment in the effluent treatment plant. Kinetics of the removal of phenol from industrial effluent having different initial phenol concentration using Gondwana shale has been studied in a batch contactor by varying different parameters. Morris Webber model has been found to fit the kinetic data. Langmuir isotherm model has been found to fit the equilibrium data with R2 value of 0.986 and adsorption capacity q0 of 0.0334 mg g−1. Response surface methodology has been employed to optimize the removal condition of phenol using shale. The spent shale obtained by removing phenol at optimum condition is used for recovery study. Finally, to see whether the shale is efficient with much higher concentration of phenol, it is contacted with untreated industrial wastewater coming directly from coke-oven battery in a batch contactor. 74.11% removal has been obtained after 24 h when 100 ml of industrial wastewater having phenol concentration of 476.24 mg/L was contacted with 50 g shale at pH 9.3.
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