Electrochemical pre-treatment of effluents containing chlorinated compounds using an adsorbent |
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Authors: | N W Brown E P L Roberts |
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Affiliation: | (1) School of Chemical Engineering and Analytical Sciences, University of Manchester, P.O. Box 88, Manchester, M60 1QD, UK |
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Abstract: | Electrochemical pre-treatment of industrial wastewater to remove refractory and/or toxic organic components, making them more
amenable to biological treatment, is likely to be more cost-effective than using a physical or chemical process for complete
organic removal. This paper demonstrates the use of a carbon-based adsorbent material that preferentially removes chlorinated
organic compounds. Electrochemical regeneration of the adsorbent is shown to be a quick, easy and cheap process, because the
adsorbent is both highly electrically conducting and non-porous. High regeneration rates over a number of cycles were obtained
by passing a charge of 25 C g−1 through a bed of adsorbent particles, at a current density of 20 mA cm−2 for 10 min. The energy required to remove a kg of COD from an industrial wastewater was calculated to be 27 kWh. |
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Keywords: | Nyex Preferential adsorption Phenol Chlorinated phenols Electrochemical regeneration Pre-treatment Industrial wastewater |
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