摘要
研究了高锰酸盐与臭氧单独或复合预氧化对消毒副产物前质———三卤甲烷生成势(THMFP)和卤乙酸生成势(HAAFP)的去除效果。试验结果表明,高锰酸盐单独预氧化对消毒副产物前质的去除率可达20%以上,而臭氧预氧化的去除率仅约为10%。复合氧化比单一氧化更能有效去除消毒副产物前质,但受投加方式的影响,在试验条件下,以两种氧化剂同时投加的效果为最佳。复合氧化去除消毒副产物前质的机理包括:高锰酸盐与臭氧的协同氧化作用、锰的中间态产物对臭氧的催化作用以及高锰酸盐的强化混凝作用。
The effect of preoxidation on the reduction of disinfection by-products （DBPs） precursor （THMFP,HAAFP）by single oxidation or combined oxidation such as permanganate and ozone was studied. The results show that single permanganate preoxidation can remove DBPs precursor for 20 percent, while ozone oxidation reaches only 10 percent reduction of DBPs. The combined oxidation can effectively remove more DBPs precursor than single oxidation, but it is affected by the method of oxidant addition. Under the experimental conditions, the highest removal efficiency is achieved with two oxidants added simultaneously. The mechanism of combined oxidation may include co-oxidation, catalyzed oxidation between manganese and ozone, and the enhanced coagulation by permanganate.
出处
《中国给水排水》
CAS
CSCD
北大核心
2006年第9期1-4,9,共5页
China Water & Wastewater
基金
国家高技术研究发展计划(863)项目(2002AA601120)
关键词
高锰酸盐
臭氧
复合氧化
消毒副产物
前质
permanganate
ozone
combined oxidation
disinfection by-products
precursor
