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Membrane Water Treatment Volume 8, Number 2, March 2017 , pages 201-210 DOI: https://doi.org/10.12989/mwt.2017.8.2.201 |
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Removal of nitrate by electrodialysis: effect of operation parameters |
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Ki Young Park, Ho Young Cha, Phrompol Chantrasakdakul, Kwanyong Lee, Ji Hyang Kweon and Sungjun Bae
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| Abstract | ||
| We investigated the effect of applied voltage and electrolyte concentration on the nitrate removal and its energy/current efficiency during the electrodialysis. The current increased as the applied voltage increased up to 30 V showing the limiting current density around 20 V. The nitrate removal efficiency (31 to 71% in 240 min) and energy consumption (11 to 77 W∙h/L) gradually increased as the applied voltage increased from 10 to 30 V. The highest current efficiency was obtained at 20 V. The increase in electrolyte concentration from 100 to 500 mM led to the dramatic increase of nitrate removal efficiency with much faster removal kinetics (100 % in 10 min). | ||
| Key Words | ||
| electrodialysis; nitrate removal; applied voltage; current efficiency; energy efficiency | ||
| Address | ||
| Ki Young Park, Ho Young Cha, Phrompol Chantrasakdakul and Kwanyong Lee : Department of Civil and Environmental System Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Republic of Korea Ji Hyang Kweon and Sungjun Bae : Department of Environmental Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Republic of Korea | ||
