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Utilization of Bipolar Membrane Electrodialysis for Salt Water Treatment

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Bipolar ion-exchange membranes, using polystyrene ethylene utylenes polystyrene (PSEBS) with polyvinyl alcohol as the intermediate, were fabricated and evaluated for their potential to remove secondary salts from lab-prepared salt solutions. Experiments were carried out in batch re-circulation mode. The mechanical properties and microscopic images of the membranes were analyzed before, during, and after the electrodialysis process. The performance of the membranes in the stack was evaluated in terms of energy consumption and current efficiency, and found to be 1.07 Wh/mol and 0.67, respectively. Commercially-produced membranes were used as a comparison to the PSEBS-based membranes. In the case of the commercial membrane, polystyrene divinylbenzene, the values for the above parameters were observed to be 2.59 Wh/mol and 0.63, respectively. In addition, other parameters, such as transport number of ions and acid ‐ alkali production, were evaluated for both PSEBS-based and commercially-produced membranes. Results indicated that PSEBS-based membranes exhibited better performance than the commercial membranes.

Keywords: bipolar membrane electrodialysis; current efficiency; energy consumption; mechanical properties; polystyrene ethylene utylenes polystyrene polymer; polyvinyl alcohol intermediate

Document Type: Research Article


Publication date: 2013-07-01

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    Water Environment Research� (WER�) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
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