Journal of Korean Society of Environmental Engineers (대한환경공학회지)

Korean Society of Environmental Engineers (대한환경공학회)
권호 표지
DOI QR코드

DOI QR Code

The Effect of Pre-Treatment Methods for the Life Time of the Insoluble Electrodes

불용성 전극의 전처리 방법이 전극의 수명에 미치는 영향

  • Park, Mi-Jung (Wookyoung Electrolysis System Co.) ;
  • Lee, Taek-Soon (Department of Environmental Engineering, Changwon National University) ;
  • Kang, Meea (Department of Environmental Engineering, Andong National University) ;
  • Han, Chi-Bok (Gyeongsangnam-do Institute of Health and Environment)
  • Received : 2015.11.26
  • Accepted : 2016.04.11
  • Published : 2016.06.30
Download PDF
⟨ Previous Next ⟩

Abstract

Electrochemical water treatment process as a useful treatment method for the removal of non-degradable matter has been consistently studied for several decades. Key process of electrochemical water treatment are oxidation reaction from an anode and reduction from a cathode. In this study, the effect of pre-treatment methods in the insoluble electrode manufacturing process for the water treatment has been evaluated for the life time of electrode The results of this study showed that pre-treatment methods of a base metal such as surface roughness, clean method and interlayer formation influenced to life time of electrode when the same condition (catalyst electrode layer coating method and material system) was applied for pre-treatment methods. This study was conducted by using $IrO_2/Ti$ electrode In the test of sand-blasting process, an electrode manufactured by using sanding media of different sizes resulted in the most effective electrode life time when the size of alumina was used for $212{\sim}180{\mu}m$ praticle size (#80). The most effective method was considered using arc plasma in the additional roughness control and cleaning process, sputtering method to form Ta type interlayer formation process.

불용성 전극은 전기화학 공정에 있어 가장 핵심적인 소재이며, 이를 이용한 전기화학적 수처리 공정은 난분해성 물질을 제거하는 유용한 방법으로서 이에 대한 연구가 지속적으로 이루어져 오고 있다. 전기화학적 수처리 공정은 주로 산화전극에서의 산화반응과 환원전극에서의 환원반응을 이용하는 것이다. 본 연구에서는 불용성 전극의 제조공정에서 전처리 방법이 전극의 수명에 미치는 영향을 평가하였다. 실험결과 촉매전극층을 코팅하는 물질계 및 코팅방법을 동일하게 하는 경우에도 기판의 전처리 방법 즉, 기판표면의 조도, 세정방법, 중간층 형성 여부 및 방법 등에 따라 전극의 수명이 크게 달라지는 것을 확인하였다. 실험은 가장 많이 사용되는 전극의 하나인 $IrO_2/Ti$ 전극을 대상으로 하였다. 샌드 블라스팅 공정의 경우 입도를 달리하는 샌딩 미디어를 이용하여 전극을 제조하고 이에 대한 수명을 평가한 결과 #80알루미나(입도 $212{\sim}180{\mu}m$)를 이용하는 경우가 가장 효과적인 것으로 나타났다. 기판에 대한 세정 공정은 arc plasma를 이용하는 것이 가장 우수하였으며, 중간층을 형성함에 있어서는 스퍼터링법을 이용하여 Ta 계열의 중간층을 형성하는 방법을 적용하는 것이 가장 바람직한 것으로 확인되었다.

Keywords

References

  1. Lee, J., "Advanced Treatment of Wastewater by Electrochemical Process," Doctoral Thesis, Kyungsung Univ., p. 1-6(2002).
  2. Lee, J.-C., "A Study on Characteristics of Phosphorus Removal by MBR Sewage Treatment in Combination with Electrochemical Dephosphorization," Doctoral Thesis, Chonnam National Univ., pp. 34-35(2012).
  3. Li, W., Zhou, Q. and Hua, T., "Removal of Organic Matter from Landfill Leachate by Advanced Oxidation Processes: A review," Int. J. Chem. Eng., 2010, 1-10(2010).
  4. Lee, J., Lee, J.-K., Uhm, S. and Lee, H.-J., "Electrochemical Technologies : Water-Treatment," Appl. Chem. Eng., 22(3), 236(2011).
  5. Pauli, C. P. and Trasatti, S., "Composite materials for electrocatalysis of $O_2$ evolution : $IrO_2+SnO_2$ in acid solution," J. Electroanalyt. Chem., 538, 145-151 (2002).
  6. Park, Y., Lee, J., Park, Y.-S. and Kim, D., "A Study on Accelerated Life Test of Insoluble Electrode," Proceedings of the Korean Environmental Sciences Society Conference, The Korean Environmental Sciences Society, Gangneung, p. 260 (2013).
  7. Ohring, M., "The Materials Science of Thin Films," Academic Press INC., Boston, USA, pp. 439-450(1991).
  8. Shim, S., "Properties of lead dioxide electrode affecting oxidant generation in electrochemical water treatment process," Doctoral Thesis, Seoul National Univ., p. 78(2013).
  9. Kim, H.-W., "Influence of Surface Roughness on the Adhesive Force for a Deposition of TiN(I), Chungju Nat. Univ., Collection of Dissertations, 39(1), 18-20(2004).
  10. Jung, J.-H., Yang, J.-H., Park, H.-S., Song, M. and Jeong, J.-I., "Properties of TiN Films Fabricated by Oblique Angle Deposition," J. Korean Inst. Surf. Eng., 45(3), 106(2012). https://doi.org/10.5695/JKISE.2012.45.3.106
  11. Kim, S., "Nanocatalyst Materials Prepared by Arc Plasma Deposition," Appl. Chem. Eng., 25(4), 341-342(2014). https://doi.org/10.14478/ace.2014.1073
  12. Oh, Y.-S., "Characterization of Tribological Properties of DLC Films Prepared by Different Deposition Method," J. Korean Ceramic Soc., 46(5), 502(2009).
  13. Song, J.-S. and Nam, T.-W., "The Effects of Interlayer on the DLC Coating," J. Corrosion Sci. Soc. Korea, 10(2), 65-70(2011).
  14. Lee, J.-S., Park, H.-D., Shin, S.-M. and Park, J.-W.,. "Adhesion and Agglomeration Phenomena of Pt Film of Resistance Heat Source," Korean J. Mater. Res., 6(2) 204-209(1996).
  15. Polini, R., "Chemically vapour deposited diamond coatings on cemented tungsten carbides : Substrate Pretreaments, adhesion and cutting performance," Thin Solid Films, 515, 4-13 (2006). https://doi.org/10.1016/j.tsf.2005.12.042
  16. Permelec Electrode Ltd.,, "Manufacturing Process of Electrodes for Electrorysis," US Patent, US 20090246410A1(2009).
  17. Korea Institute of Machinery & Materials, "Mixed Metal Oxide Electrode For Making Sterilized Water With Hypochlorous Acid And Manufacturing Method Thereof," Korean Patent 10-1079689(2011).