二氧化氯预氧化控制饮用水三卤甲烷生成势的研究  

THMFP Control of Drinking Water via Preoxidation of Chlorine Dioxide

作　　者：王丽坤[1] 王启山[1] 刘艳芳[1] 杨健康[1] 孙晓明[1] 

机构地区：[1]南开大学环境科学与工程学院,天津300071

出　　处：《天津大学学报》2009年第12期1118-1122,共5页Journal of Tianjin University(Science and Technology)

基　　金：教育部天南大共建项目

摘　　要：为了减少饮用水中三卤甲烷(THMs)的生成,采用二氧化氯预氧化取代传统的预氯化.采用自制的二氧化氯,其纯度在99%以上,在避光/封口的条件下,投加2 mg/L的二氧化氯与原水反应30 min.通过超滤膜法分析不同分子量区间三卤甲烷生成势(THMFP)的变化,发现大部分小分子物质被氯化生成THMs,经二氧化氯氧化后,发现不同分子量区间的THMFP均有所降低,且部分大分子物质变为小分子物质,这些物质较难与氯发生反应生成THMs,说明THMs的生成不仅与分子量有关还与分子结构相关.另外,二氧化氯预氧化对色度和浊度都有比较明显的去除效果.In order to reduce the formation of THMs in drinking water,traditional prechlorination has bean replaced by preoxidation of chlorine dioxide. Chlorine dioxide adopted in the experiment was self-made with purity over 99%. Under dark/sealed conditions,2 mg/L of chlorine dioxide was added to raw water to produce a reaction lasting 30 min. Analysis with ultrafiltration membrane of the change of thihalomathanes formation potential （THMFP） with different molecular weights shows that most small molecule materials have been chlorinated into THMs. After preoxidation of chlorine dioxide, THMFPs with different molecular weights have decreased and most macromolecular materials have changed into small molecule materials,which were difficult to react with chlorine to generate THMs. Experimental results show that THM formation is related to both the molecular weight and molecular structure. In addition, preoxidation of chlorine dioxide has apparent effect on the removal of turbidity and chroma.

关 键 词：二氧化氯 预氧化 三卤甲烷生成势(THMFP) 

分 类 号：X52[环境科学与工程—环境工程]