An attempt has been made to remove oil from synthetic oily wastes using electrochemical treatment. The standard jar test apparatus was used with ferric sulfate as coagulant. The effects of alternating and direct current were evaluated in terms of coagulant aid in the oil removal process. The removal efficiency was found to be as high as 96% using 150 mg/L of ferric sulphate and a direct current of 100 V applied for 16 minutes. The polarity of the electrodes and the electric field gradient played an important role in the destabilization of oil emulsion.
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Biswas et al. (1991) studied this question.
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