电化学消毒中羟基自由基的测定  

Determination of ·OH originated in electrochemical disinfection

作　　者：刁惠芳[1] 白玮[2] 李晓岩[3] 陈光宇[4] 程少安[4] 施汉昌[1] 

机构地区：[1]清华大学环境科学与工程系环境模拟与污染控制国家重点联合实验室,北京100084 [2]核工业第二研究设计院,北京100840 [3]香港大学土木工程系,香港999077 [4]香港大学化学系,香港999077

出　　处：《给水排水》2004年第9期59-62,共4页Water & Wastewater Engineering

基　　金：香港特别行政区研究基金资助项目(HKU7008/01E)。

摘　　要：为了检测电化学消毒过程中产生的羟基自由基(·OH),采用电子自旋共振(ESR)技术,以PBN(α-phenyl-N-tert-butyl nitrone)和DMPO(5,5-dimethyl-1-pyrroline-N-oxide)为自旋捕捉剂,测定出NaCl溶液在电解过程中和电解结束后·OH与自旋捕捉利形成的自旋加合物的ESR谱图。而作为·OH清除剂的D-甘露糖醇加入电解液后,ESR信号随之减弱。试验结果证实了电解溶液体系中·OH的存在。The primary objective of the study is to detect and identify · OH originated from electrolysis of saline solution by ESR spin-trapping. In this paper, the electron spin resonance (ESR) spectra of · OH in the electrolyzed saline solution were detected and identified with the spin traps such as PBN and DMPO. The ESR signal intensity of ·OH was decreased with the addition of D-mannitol. The results show that ·OH is originated in the electrochemical disinfection.

关 键 词：电化学消毒 ESR 减弱 电子自旋共振 试验结果 测定 清除剂 加合物 OH D-甘露糖醇 

分 类 号：TU991.25[建筑科学—市政工程] R123.6[医药卫生—环境卫生学]