摘要
Reactions of 4-chlorophenol, and other phenols, with eaq , ?H, ?N3 and ?OH in aqueous solutions were studied - by nano-second pulse radiolysis. The transient absorption spectra were attributed to determine the micro-reaction rate constants. It was found that the phenols were more easily oxidized by ?OH than reduced by eaq ; and pH value - and molecular structure of the phenols affected the rate constants of the reactions. In addition, γ-ray radiolysis of 4-chlorophenol aqueous solution was performed and the degradation products were analyzed with HPLC, GC-MS and other methods. It is concluded that the radiolysis technology alone is not efficient in terms of mineralization of the phenol and the presence of O2 and alkaline conditions can facilitate the mineralization process.
Reactions of 4-chlorophenol, and other phenols, with eaq-, ·H, ·N3 and ·OH in aqueous solutions were studied by nano-second pulse radiolysis. The transient absorption spectra were attributed to determine the micro-reaction rate constants. It was found that the phenols were more easily oxidized by ·OH than reduced by eaq-; and pH value and molecular structure of the phenols affected the rate constants of the reactions. In addition, γ-ray radiolysis of 4-chlorophenol aqueous solution was performed and the degradation products were analyzed with HPLC, GC-MS and other methods. It is concluded that the radiolysis technology alone is not efficient in terms of mineralization of the phenol and the presence of O2 and alkaline conditions can facilitate the mineralization process.
出处
《辐射研究与辐射工艺学报》
EI
CAS
CSCD
北大核心
2005年第2期70-71,共2页
Journal of Radiation Research and Radiation Processing
基金
国家自然科学基金(39700029)资助
关键词
4-氯酚
降解机理
脉冲辐解
γ辐解
Chlorophenols, Degradation mechanisms, Pulse-radiolysis, γ-ray radiolysis
