A Study on Enhancement of Nitrate Removal Efficiency using Surface-Modified Zero-Valent Iron Nanoparticles

표면개질된 영가철 나노입자를 이용한 질산성 질소 제거율 향상에 대한 연구

  • Lim, Taesook (Dept. of Environmental Engineering, Kwangwoon University) ;
  • Cho, Yunchul (Dept. of Environmental Engineering, Kwangwoon University) ;
  • Cho, Changhwan (Dept. of Environmental Engineering, Kwangwoon University) ;
  • Choi, Sangil (Dept. of Environmental Engineering, Kwangwoon University)
  • 임태숙 (광운대학교 환경공학과) ;
  • 조윤철 (광운대학교 환경공학과) ;
  • 조장환 (광운대학교 환경공학과) ;
  • 최상일 (광운대학교 환경공학과)
  • Received : 2016.01.12
  • Accepted : 2016.03.24
  • Published : 2016.04.30


In order to treat groundwater containing high levels of nitrate, nitrate reduction by nano sized zero-valent iron (nZVI) was studied using batch experiments. Compared to nitrate removal efficiencies at different mass ratios of $nitrate/Fe^0$, the removal efficiency at the mass ratio of 0.02% was the highest(54.59%). To enhance nitrate removal efficiency, surface modification of nZVI was performed using metallic catalysis such as Pd, Ni and Cu. Nitrate removal efficiency by Cu-nZVI (at $catalyst/Fe^0$ mass ratio of 0.1%) was 66.34%. It showed that the removal efficiency of Cu-nZVI was greater than that of the other catalysts. The observed rate constant ($k_{obs}$) of nitrate reduction by Cu-nZVI was estimated to $0.7501min^{-1}$ at the Cu/Fe mass ratio of 0.1%. On the other hand, TEM images showed that the average particle sizes of synthetic nZVI and Cu-nZVI were 40~60 and 80~100 nm, respectively. The results imply that catalyst effects may be more important than particle size effects in the enhancement of nitrate reduction by nZVI.


Nitrate;Zero-valent iron;Nano particle;Surface modification;Metallic catalyst


Supported by : 광운대학교


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