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Effect of placement angles on wireless electrocoagulation for bipolar aluminum electrodes

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Abstract

We in our previous study reported the wireless electrocoagulation (WEC) based on bipolar electrochemistry for water purification. One of the most important advantages of WEC is the omission of ohmic connection between bipolar electrode (BPE) and power supply, and thus the electrochemical reactions on BPE are driven by electric field in solution induced by driving electrodes. In this study, the impact of placement angle of bipolar aluminum electrode on WEC was investigated to provide a detailed analysis on the correlations between the bipolar electrode placement angle and bipolar electrocoagulation reactions. The results showed that the WEC cell with a horizontal BPE placed at 0° produced the maximum dissolved aluminum coagulant, accounting for 71.6 % higher than that with a vertical one placed at 90°. Moreover, the finite element simulations of current and potential distribution were carried out along the surface of BPE at different placement angles, revealing the mechanism of different BPE placement angles on aluminum dissolution rates in WEC system.

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Acknowledgements

Project supported by the National Natural Science Foundation of China (Grant No. 51678184), State Key Laboratory of Urban Water Resource and Environment (No. 2017DX12), HIT Environment and Ecology Innovation Special Funds (HSCJ201610).

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Authors and Affiliations

  1. State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China

    Zhenlian Qi, Jinna Zhang & Shijie You

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  1. Zhenlian Qi
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  2. Jinna Zhang
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  3. Shijie You
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Correspondence to Shijie You.

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Qi, Z., Zhang, J. & You, S. Effect of placement angles on wireless electrocoagulation for bipolar aluminum electrodes. Front. Environ. Sci. Eng. 12, 9 (2018). https://doi.org/10.1007/s11783-018-1034-y

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  • DOI: https://doi.org/10.1007/s11783-018-1034-y

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