A novel electrochemical ion exchange system and its application in water treatment |
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| Authors: | Yansheng Li Yongbin Li Zhigang Liu Tao Wu Ying Tian |
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| Institution: | 1. College of Environmental and Chemical Engineering, Dalian Jiaotong University and Liaoning Key Laboratory for Environmental Science and Technology, Dalian 116028, China;2. Dalian Development Centre of Environmental Technology, Dalian 116024, China;1. Department of Chemistry, University of Kalyani, Kalyani 741 235, India;2. Department of Biochemistry & Biophysics, University of Kalyani, Kalyani 741 235, India;3. School of Chemistry, University of St Andrews, North Haugh, St Andrews, Fife KY16 9ST UK;1. Radioanalytical Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India;2. Fuel Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India;3. Product Development Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India;1. Institute of Marine Sciences, Federal University of São Paulo, Santos/SP, Brazil;2. Center of Engineering, Modeling and Applied Social Sciences, Federal University of ABC, Santo André/SP, Brazil;1. Institute of Environmental Research, Kangwon National University, 1 Gangwondaehak-gil, Chuncheon-si, Gangwon-do 24341, Republic of Korea;2. Environmental and Plant Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology, 283 Goyangdae-ro, Ilsanseo-gu, Goyang-si, Gyeonggi-do 10223, Republic of Korea |
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| Abstract: | A novel electrochemical ion exchange system with porous cylinder electrodes is proposed for treatment of wastewater. This system can be used for desalination without the costly ion-exchange membrane and extra chemical reagents. Since the electrodes are completely uniform and no ion-exchange membrane was used in this system, it can be operated by switching anodes and cathodes flexibly for eliminating the scaling on the surface of electrodes. The strong base ion-exchange resin grains placed among the anode and cathode have played as supporting electrolyte, which is capable for the treatment of wastewater with low conductivity. The concentrated and neutralized anolyte containing chlorine is effective for disinfection and contaminants removal. Under the experimental conditions, the removal percentage of total dissolved salts was 83% and the removal percentage of chemical oxygen demand was 92% without consumption of extra chemical reagents. |
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