Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Mediated Electrochemical Oxidation of High Molecular Weight PEGs by Co(III)/Co(II) and Fe(III)/Fe(II) Redox Systems

Co(III)/Co(II) 및 Fe(III)/Fe(II) 산화환원계에 의한 고분자량 폴리에텔렌글리콜류의 매개전해산화

  • Park, Seung-Cho (Department of Environmental Engineering, Dong-A University) ;
  • Kim, Ik-Seong (Hwamyeong Water Purification Office, Water Works HQ Busan Metropolitan City)
  • 박승조 (동아대학교 환경공학과) ;
  • 김익성 (부산광역시 상수도사업본부 화명정수사업소)
  • Received : 2004.07.26
  • Accepted : 2004.12.17
  • Published : 2005.04.10
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Abstract

Mediated electrochemical oxidation (MEO) of polyethylene glycols (PEGs) of molecular weight of 1000, 4000 and 20000, was carried out on both platinum (Pt) and titanium-iridium electrodes in 8.0 M nitric acid solution containing 0.5 M Fe(II) and Co(II) ion. The electrochemical parameters such as current densities, kinds of electrode, electrolyte concentration and removal efficiency were investigated in both Fe(III)/Fe(II) and Co(III)/Co(II) redox systems. The PEGs was decomposed into carbon dioxide by MEO in Fe(III)/Fe(II) and Co(III)/Co(II) redox system during 180 min and 210 min at the current density of $0.67A/cm^2$ on the Pt electrode. Removal efficiency of PEGs by MEO was better in Co(III)/Co(II) redox system than Fe(III)/Fe(II) redox system, indicating mediated electrochemical removal efficiency was 100%.

백금과 티탄늄-이리듐전극으로 0.5 M의 철(II)과 코발트(II) 이온을 함유한 8.0 M의 질산용액 중에서 분자량이 1000, 4000, 20000인 폴리에틸렌글리콜류의 매개전해산화를 하였다. Fe(III)/Fe(II)와 Co(III)/Co(II) 산화환원계를 이용하여 전류밀도, 전극종, 전해질농도, 제거효율 등을 검토하였다. 백금전극 상에서 $0.67A/cm^2$의 전류밀도로 180~210 min 간 Fe(III)/Fe(II)와 Co(III)/Co(II) 전해환원계에서 매개전해산화에 의하여 폴리에틸렌글리콜류는 탄산가스로 분해되었다. 매개전해산화시 폴리에틸렌글리콜류의 제거효율은 Fe(III)/Fe(II) 산화환원계보다 Co(III)/Co(II) 산화환원계가 우수하였고 분자량이 1000, 4000, 20000인 폴리에틸렌글리콜류의 매개전해산화 제거효율은 100%이었다.

Keywords

References

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