二氧化氯在饮用水中消毒副产物的形成  

Formation of Disinfection By-products by Using Chlorine Dioxide in Potable Water

作　　者：朱明新[1] 沈丽娜[1] 朱小梅[1] 徐炎华[1] 

机构地区：[1]南京工业大学环境学院,江苏南京210009

出　　处：《安徽农业科学》2012年第6期3508-3509,3561,共3页Journal of Anhui Agricultural Sciences

基　　金："863"重大专项课题(2007AA06A402);国家重大科技支撑计划课题(2006BAC02A15);江苏省科技支持计划课题(BE2010504)

摘　　要：[目的]研究二氧化氯消毒副产物的形成和各种操作参数的影响。[方法]采用腐殖酸作为模拟废水进行试验,考察高纯二氧化氯在饮用水消毒过程中三氯甲烷和二氧化氯无机副产物的生成情况,研究温度、反应时间、pH、腐殖酸浓度和二氧化氯浓度等因素对饮用水中三氯甲烷和无机副产物形成的影响。[结果]有机物浓度、二氧化氯浓度是三卤甲烷形成的主要因素,三卤甲烷的含量随着腐殖酸浓度的增加而增加,但反应4 h后低于7μg/L,当二氧化氯浓度大于1.2 mg/L时,可产生大量的三卤甲烷,而pH的影响不大,温度有一定影响。无机副产物的形成与ClO2/TOC的值有较强的关联,pH为6和7时的ClO3-和ClO2+ClO2-+ClO3-的含量要高于在其他pH时的含量。[结论]该研究可为有效控制三卤甲烷的形成提供参考。[Objective]The study aimed to study the formation of disinfection by-products by using chlorine dioxide（ClO2） and the effects ofvarious operating parameters on it.[Method]In the experiment with the humic acid as the simulation wastewater,the generation of the troha-lomethanes（THMs） and ClO2 inorganic by-products during the disinfection process by ClO2 with the high purity in the potable water were in-vestigated and the effects of the factors such as temperature,reaction time,pH value,the concn.of the humic acid and ClO2 on the formation of the THMs and inorganic by-products in the potable water were studied.[Result]The organic matter concn.,ClO2 concn.were the mainfactors on the formation of the THMs.The THMs content was increased with the increment of the humic acid concn.,but it was less than 7 ug/L after the reaction for 4 h.When ClO2 was more than 1.2 mg/L,it could produce a large number of THMs.The pH value had little influ-ence and the temperature had a certain effect on the formation of the THMs.The formation of the inorganic by-products had a strong correlation with ClO2 /TOC dosage.The contents of ClO3-and ClO2＋ClO2-＋ClO3-at pH 6 and 7 were higher than that at other pH value.[Conclusion] The study provided the reference for the effective control of the THMs formation.

关 键 词：二氧化氯 消毒副产物 三卤甲烷 亚氯酸根 氯酸根 

分 类 号：R123.6[医药卫生—环境卫生学]