二氧化氯水消毒副产物的生成规律及其影响因素研究  

Development of Chlorite and Influencing Factors in Drinking Water Treatment with Chlorine Dioxide

作　　者：何涛[1] 鄂学礼[1] 王红伟[1] 张岚 

机构地区：[1]中国疾病预防控制中心环境与健康相关产品安全所,北京100050

出　　处：《环境与健康杂志》2008年第2期101-103,共3页Journal of Environment and Health

基　　金："十一五"国家科技支撑计划重点项目(2006BAD01B05)

摘　　要：目的研究二氧化氯水消毒副产物——亚氯酸盐的生成规律及其影响因素。方法实验水样取自某污水处理厂,过滤后稀释备用;取耗氧量为5mg/L的水样3份,加入不同量的二氧化氯浓溶液,使二氧化氯初始浓度分别为0.2、0.5、1mg/L,避光密封放置30min后取样;向耗氧量为1.5mg/L的水样中加入一定量的二氧化氯浓溶液,分别于避光密封接触1、10、20、30min时取样;向耗氧量为1.5、3、5、6、8mg/L的水样中分别加入等量二氧化氯溶液,反应30min时取样;实验采用离子色谱法测定亚氯酸根的浓度。结果在其他条件不变时,随着二氧化氯投加浓度的增大,亚氯酸盐生成量增加(从0.11mg/L增加到0.21mg/L);随着接触时间的增加,亚氯酸盐的生成量呈增加趋势,但不同接触时间亚氯酸盐的生成速度不同,接触初始阶段,亚氯酸盐生成速度较快,以后渐缓,亚氯酸盐浓度从0.80mg/L增加到1.82mg/L;当耗氧量从1.5mg/L增加到5mg/L时,亚氯酸盐生成量由2.0mg/L增加到2.62mg/L;但当耗氧量由5mg/L增加到8mg/L时,亚氯酸盐生成量未见显著变化,亚氯酸盐浓度从2.62mg/L增加到2.70mg/L;随着输水距离(100m～9000m)的增加,亚氯酸盐生成速度渐缓,亚氯酸盐浓度从0.15mg/L增加到0.25mg/L。结论二氧化氯投加浓度、接触时间、耗氧量和输水距离对亚氯酸盐的生成量均有影响。Objective To study the rules and influencing factors of chlorite development concerning water disinfection by using chlorine dioxide. Methods The water samples were taken from the sewage treatment plant and prepared for use after filtration. Different dosages of chlorine dioxide were added into three water samples with COD of 5 mg/L, making the initial concentration of chlorine dioxide 0.2 mg/L, 0.5 mg/L and 1 mg/L respectively, and the concentration of chlorite was determined 30 min after adding chlorine dioxide. Chlorine dioxide was added into water sample with COD of 1.5 mg/L and the concentration of chlorite was determined 1 min, 10 min, 20 min, 30 min, 40 min, 50 min, and 60 min after adding chlorine dioxide. Chlorine dioxide was added into water samples with COD of 1.5 mg/L, 3 mg/L, 5 mg/L, 6 mg/L and 8 mg/L respectively, and the concentration of chlorite was determined 30 min after adding chlorine dioxide. Ion chromatographic was used to determine the concentration of chlorite in this research. Results When the other conditions were fixed, as the dose of chlorine dioxide increased, chlorite increased from 0.11 mg/L to 0.21 mg/L. With contact time increased, chlorite showed an increasing trend, but different contact time showed different formation speed, which was faster at the beginning and slowed down gradually, chlorite increased from 0.80 mg/L to 1.82 mg/L. When COD increased from 1.5 mg/L to 5 mg/L, chlorite increased from 2.0 mg/L to 2.62 mg/L, but when COD increased from 5 mg/L to 8 mg/L, the production of chlorite showed no significant changes, the concentration was from 2.62 mg/L to 2.70 mg/L. The aqueduct distance showed the same trend like the contact time, and chlorite increased from 0.15 mg/L to 0.25 mg/L. Conclusion The dosage of chlorine dioxide, contact time, COD and aqueduct distance may influence the chlorite development in drinking water treatment with chlorine dioxide.

关 键 词：水 消毒 二氧化氯 亚氯酸盐 化学耗氧量 接触时间 

分 类 号：R126.4[医药卫生—环境卫生学]