铁还原降解饮用水中三氯乙腈的试验研究  

STUDY ON DEGRADATION OF TRICHLOROACETONITRILE IN DRINKING WATER BY REDUCED IRON POWDER

作　　者：丁春生[1] 邹胜男[1] 马海龙[1] 苗世茂 肖毛虎 DING Chun-sheng,ZOU Sheng-nan,MA Hai-long,MIAO Shi-mao,XIAO Mao-hu(College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, Chin)

机构地区：[1]浙江工业大学建筑工程学院,浙江杭州310014

出　　处：《能源环境保护》2018年第1期16-19,6,共5页Energy Environmental Protection

摘　　要：为了降低饮用水在消毒过程中产生的消毒副产物三氯乙腈(TCAN),以TCAN为研究对象,采用铁还原工艺研究其降解TCAN的效能、机制和动力学。结果表明,铁粉还原能有效的降解饮用水中的TCAN,降解效果会随着温度升高、反应时间增加、铁粉投加量增加而提高。当TCAN的初始浓度为40μg/L,还原铁粉的投加量为12.50 g/L,反应经过240 min后,TCAN的降解效率达到了80.44%。铁粉以氢解反应的方式降解TCAN,呈现一级反应的动力学特征。In order to reduce the disinfection by-product（trichloroacetonitrile, TCAN）produced by disinfection process in drinking water, the effect, mechanism and kinetics of TCAN degradation by iron reduction process were studied. The results indicate that reduced iron powder effectively degrades TCAN in drinking water. The degradation effect increases with higher temperature, longer reaction time, larger dosage of reduced iron powder. When the initial concentration of TCAN was 40 μg/L, the dosage of iron powder was 12.50 g/L, and the reaction time was 240 minutes, the degradation efficiency of TCAN reaches 80.44 %.Reduced iron powder degrades TCAN by a hydrogenolysis reaction which shows a first order kinetics.

关 键 词：饮用水 消毒副产物 TCAN 铁粉 动力学 

分 类 号：X703.5[环境科学与工程—环境工程]