• Three-dimensional Electrochemical Oxidation process using Nanosized Zero-valent Iron/Activated carbon as Particle electrode and Persulfate
  • Min, Dongjun;Kim, Cheolyong;Ahn, Jun-Young;Cho, Soobin;Hwang, Inseong;
  • Department of Civil & Environmental Engineering, Pusan National University;Department of Civil & Environmental Engineering, Pusan National University;Department of Civil & Environmental Engineering, Pusan National University;Department of Civil & Environmental Engineering, Pusan National University;Department of Civil & Environmental Engineering, Pusan National University;
  • 나노영가철/활성탄 입자전극과 과황산을 이용한 3차원 전기화학적 산화공정
  • 민동준;김철용;안준영;조수빈;황인성;
  • 부산대학교 사회환경시스템공학과;부산대학교 사회환경시스템공학과;부산대학교 사회환경시스템공학과;부산대학교 사회환경시스템공학과;부산대학교 사회환경시스템공학과;
Abstract
A three-dimensional electrochemical process using nanosized zero-valent iron (NZVI)/activated carbon (AC) particle electrode and persulfate (PS) was developed for oxidizing pollutants. X-ray diffraction (XRD), scanning electron microscopy with energy dispersive spectroscopy (SEM-EDS), and Brunauer-Emmett-Teller (BET) surface area analysis were performed to characterize particle electrode. XRD and SEM-EDS analysis confirmed that NZVI was impregnated on the surface of AC. Compared with the conventional two-dimensional electrochemical process, the three-dimensional particle electrode process achieved three times higher efficiency in phenol removal. The system with current density of $5mA/cm^2$ exhibited the highest phenol removal efficiency among the systems employing 1, 5, and $10mA/cm^2$. The removal efficiency of phenol increased as the Fe contents in the particle electrode increased. The particle electrode achieved more than 70% of phenol removal until it was reused for three times. The sulfate radical played a predominant role in phenol removal according to the radical scavenging test.

Keywords: Particle electrode;Nanosized zero-valent iron;Activated carbon;Persulfate;Electrochemical oxidation;

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