臭氧活性炭工艺中卤乙酸生成潜能与相对分子质量分布关系的研究  

Study Relationship of HAAs Formation Potential and Organic Molecular Weight Distribution in the Process of O_3/BAC

作　　者：伍海辉[1] 高乃云[1] 贺道红[1] 徐斌[1] 芮旻[1] 赵建夫[1] 

机构地区：[1]同济大学污染控制与资源化研究国家重点实验室,上海200092

出　　处：《环境科学》2006年第10期2035-2039,共5页Environmental Science

基　　金：国家高技术研究发展计划(863)项目(2002AA601130)

摘　　要：通过臭氧生物活性炭和微曝气生物活性炭（O3／BAC和micro—aeration／BAC）2套工艺研究其对不同相对分子质量有机物去除特点和不同相对分子量有机物生成的卤乙酸及其去除特性．结果表明，O3／BAC工艺对相对分子质量区间〉30×10^3的有机物去除率超过90％，O3／BAC与micro—aeration／BAC出水中，UV254值表示相对分子质量〈10^3的有机物超过50％，相对分子量区间在10×10^3～30×10^3的有机物占20％～30％；在O3／BAC和微曝气／BAC工艺出水中，以相对分子质量〈10^3的有机物生成的卤乙酸最多，生成DCAA、TCAA、DBAA分别为97．00、38．55、2．10μg／L和104．00、42．75和2．92μg／L；采用各处理单元不同分子量有机物与氯反应生成的DCAA、TCAA、DBAA和THAAs与相对应的UV254值进行线性拟合，相关系数分别为0．827、0．8513、0．8157和0．878，UV254与臭氧生物活性炭处理工艺出水中的卤乙酸生成潜能具有较好的线性关系，We investigated the removal of organic matters with different molecular weight （MW） and HAAs formation potential composed of organic matters with different MW in the two processes of O3/BAC and micro-aeration/BAC, and discussed the characteristic of forming HAAs by organic matters with different MW. The results indicated that more than 90 % of organic matters with 〉30 × 10^3 molecular weight could be removed in the process of O3/BAC. In the water treated by the two processes of O3/BAC and micro-aeration/BAC, the percentage of organic matters with 〈 10^3 MW exceeded 50 %, 1 0 × 10^3 - 30 × 10^3 MW was in 20 % 30 % based on UV254 value as token of organic matters. And the HAAs generated by the organic matters with 〈 10^3 MW occupied the main fraction, and the concentration of DCAA, TCAA and DBAA in the tow processes was 97.00,38.55,2. 10 μg/L and 104.00, 42.75, 2.92 μg/L. Finally, preferable linear relationship were found between UV254 and HAAs formation potential in finished water of the process of O3/BAC, because of the better linear fitting correction coefficient between UV254 and DCAA, TCAA, DBAA and THAAs, that is 0.827,0.851 3,0.815 7 and 0.878.

关 键 词：相对分子质量分布 卤乙酸 生成潜能 臭氧 生物活性炭 

分 类 号：TU991.25[建筑科学—市政工程]