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KMID : 1024520140230061175
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Journal of the Environmental Sciences
2014 Volume.23 No. 6 p.1175 ~ p.1182
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Effect of Cathode in Electrochemical Reaction for Treating Ballast Water
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Kim Dong-Seog
Park Hye-Jin
Yoon Jong-Mun
Park Yong-Seok
Park Young-Seek
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Abstract
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In this study, we examined the effect of cathode from electrolysis reactor for treating ballast water. We are going to select a suitable cathode for seawater electrolysis after considering the effect on the generation of the oxidant of cathode and the electrode deposition materials adhering to the surface of cathode. Anode is Ru-Ti-Pd electrode and cathode are Ti, Pt, JP520 (Ni-Pt-Ce) electrodes. Using the cathode of the three types, experiments were conducted to examine the effects of TRO (total residual oxidants) generation concentration and RNO (N, N-Dimethyl-4-nitrosoaniline, indicator of the generation of OH radical) degradation concentration (in 1, 35 psu), ohmic drop, FESEM(field emission scanning electron microscope) observation of cathode surface and EDX (energy dispersive X-ray spectroscopy) measurements of attached fouling material. The results showed that TRO generation concentration and RNO degradation concentration in according to each type of cathode are not different. The attached fouling materials were observed on the surface of Ti and the JP520 electrode by the observation of SEM after electrolysis for two hours, but it was not observed on the surface of Pt electrode. When considering the surface ohmic drop of cathode and the attached fouling materials, Pt electrode was judged as the excellent cathode.
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KEYWORD
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Electrochemical reaction, Cathode, Electric ohmic drop, Electrode attachment material, Oxidants
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