pH对氯氧化微囊藻毒素能力的影响  

Influence of pH on microcystins oxidation by chlorine

作　　者：刘成[1,2] 陈卫[2] 盛誉[2] 李磊[2] 

机构地区：[1]河海大学浅水湖泊综合治理与资源开发教育部重点实验室,江苏南京210098 [2]河海大学环境科学与工程学院,江苏南京210098

出　　处：《西安建筑科技大学学报（自然科学版）》2009年第3期424-428,共5页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：国家科技重大专项资助项目(2008ZX07421-002);国家科技支撑项目(2006BAJ08B06;2007BAC26B03)

摘　　要：利用小试实验研究了pH值对氯氧化黄浦江原水中两种微囊藻毒素效果的影响.结果表明,pH对游离氯氧化微囊藻毒素的效果具有显著的影响,较低的pH值有利于两种微囊藻毒素的氧化降解;pH值为6时的MC-LR的表观二级反应速率常数较pH值为7.25时提高了16倍;原因在于较低的pH值增加了HOCl在总游离氯中的比例,而HOCl与微囊藻毒素分子之间的反应为游离氯降解微囊藻毒素的主要途径.Bench-scale research was carried out to study the influence of pH on oxidate micocystins in the Huangpu River water by chlorine. The results showed that pH plays an important role in the reaction and lower pH favors the oxidation process; the apparent second-order kinetics coefficient at pH 6.0 is 16 times higher than that of at pH 7.25. The reason there is good reason for the lower pH enhance the proportion of HOCl,while reaction between HOCl and microcystin molecular is the main path on the microcystin oxidation by chlorine.

关 键 词：氯 消毒 微囊藻毒素 PH 

分 类 号：TU991.21[建筑科学—市政工程]