4-氯酚的辐射降解机理研究  

Degradation mechanisms of 4-chlorophenol by pulse radiolysis and γ-ray radiolysis

作　　者：汪世龙[1] 朱大章[1] 孙晓宇[1] 李文哲[1] 曾凯玲[1] 倪亚明[1] 王文锋[2] 姚思德[2] 

机构地区：[1]同济大学生命科学与技术学院,上海200092 [2]中国科学院上海应用物理研究所,上海201800

出　　处：《辐射研究与辐射工艺学报》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

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.

关 键 词：4-氯酚 降解机理 脉冲辐解 γ辐解 

分 类 号：O625.33[理学—有机化学] O644.8[理学—化学]