Effect of dissolved metal ions on PCE decomposition by gamma-rays.
This study investigates the effect of initial tetrachloroethylene (PCE) concentration, irradiation dose and dissolved metal ions such as Cr3+, Mn2+, Fe3+, Co2+, Ni2+, Cu2+ and Zn2+ on removal of PCE by gamma irradiation. The amount of removed PCE decreased with increase in initial PCE concentration and increased with increase in irradiation dose. PCE removal reached a maximum in the presence of Fe3+, while Cu2+ strongly hindered PCE decomposition. Except for Cu2+, the amount of removed PCE in the presence of metal ions was linearly dependent on the standard reduction potential of the metal ions. The extraordinary inhibition of Cu2+ in PCE removal was caused by the action of Cu2+ as a strong *OH scavenger, that was directly confirmed by electron paramagnetic resonance spectroscopy.
Chung
Hung-Ho
HH
Radioisotope & Radiation Application Team, Korea Atomic Energy Research Institute, Yusong-gu, Taejon, South Korea. chunghh1004@hanmail.net
Jung
Jinho
J
Yoon
Jeong-Ho
JH
Lee
Myun-Joo
MJ
D005720:Gamma Rays; D017665:Hydroxyl Radical; D019216:Metals, Heavy / Q000737:chemistry*; D010084:Oxidation-Reduction; D010777:Photochemistry; D012995:Solubility; D012997:Solvents / Q000737:chemistry*; D013750:Tetrachloroethylene / Q000737:chemistry*
D019216:Metals, Heavy; D012997:Solvents; D017665:Hydroxyl Radical; D013750:Tetrachloroethylene