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.

Abstract
 1. 서 론
 2. 재료 및 방법
  2.1. 실험재료
  2.2. 분석 및 측정
 3. 결과 및 고찰
  3.1. 음극 종류에 따른 TRO 생성능과 RNO 분해능
  3.2. 음극의 표면 분석
  3.3. 음극 표면 저항 분석
  3.4. 음극 표면의 EDX 분석
 4. 결 론
 참고문헌

• 김동석(대구가톨릭대학교 환경과학과) | Dong Seog Kim (Department of Environmental Science, Catholic University of Daegu)
• 박혜진(테크로스) | Hye Jin Park (Research Division, Techcross)
• 윤종문(테크로스) | Jong Mun Yoon (Research Division, Techcross)
• 박용석(테크로스) | Yong Seok Park (Research Division, Techcross)
• 박영식(대구대학교 기초교육원) | Young Seek Park (Faculty of Liberal Education, Daegu University) Corresponding author