Degradation of p-nitrophenol by Gamma Irradiation

  • Lee, O Mi (Radiation Research Division for Industry & Environment, Korea Atomic Energy Reserch Institute) ;
  • Kim, Tae-Hun (Radiation Research Division for Industry & Environment, Korea Atomic Energy Reserch Institute) ;
  • Yu, Seungho (Radiation Research Division for Industry & Environment, Korea Atomic Energy Reserch Institute) ;
  • Jung, In-ha (Radiation Research Division for Industry & Environment, Korea Atomic Energy Reserch Institute) ;
  • Lee, Myunjoo (Radiation Research Division for Industry & Environment, Korea Atomic Energy Reserch Institute)
  • 투고 : 2011.11.14
  • 심사 : 2011.12.09
  • 발행 : 2011.12.30

초록

Degradation of p-nitrophenol has been carried out using only gamma irradiation or gamma irradiation with $H_2O_2$ or $Na_2S_2O_8$. Effects of different operating parameters such as initial concentration ($50mg\;l^{-1}$, $100mg\;l^{-1}$, $200mg\;l^{-1}$, $300mg\;l^{-1}$, $400mg\;l^{-1}$, $500mg\;l^{-1}$ and $600mg\;l^{-1}$) on the extent of degradation has been investigated. At 5 kGy, $50mg\;l^{-1}$ p-nitrophenol was completely degraded, and the radiolytic degradation of p-nitrophenol was described by the pseudo-first-order kinetic model. The combination of gamma irradiation with $H_2O_2$ or $Na_2S_2O_8$ leads to an enhanced effect, which remarkably increased the degradation efficiency of p-nitrophenol and TOC removal. However, at high $H_2O_2$ concentration, the efficacy of p-nitrophenol degradation is reduced because ${\cdot}OH$ radicals are scavenged by $H_2O_2$ and $Na_2S_2O_8$.

키워드

과제정보

연구 과제 주관 기관 : Ministry of Education, Science and Technology of Korea