摘要
考察了天津市城市供水系统中卤乙酸的含量及其变化规律。结果表明,各自来水厂的出厂水及管网水中的二氯乙酸和三氯乙酸含量均远远低于《生活饮用水卫生标准》(GB5749—2006)规定的限值;自原水进入自来水厂至最终到达用户自来水龙头的整个过程,水中的二氯乙酸和三氯乙酸含量呈快速上升—保持平稳—快速下降的变化趋势,其中滤后水中的卤乙酸含量最接近或达到峰值;采用预氯化工艺会促进卤乙酸的生成,水温与卤乙酸的生成呈正相关。
The concentration and variation of haloacetic acids （HAAs） in the municipal water supply system of Tianjin were investigated. The results show that the dichloroacetic acid （DCA） and trichloroacetic acid （TCA） contents in the finished water of every waterworks and the pipe network water are far lower than the limited values in the Sanitary Standard for Drinking Water （ GB 5749 - 2006 ）. During the whole process from raw water entering waterworks to reaching end users （water taps） , the concentrations of DCA and TCA firstly increase rapidly, then keep stable and lastly decrease rapidly. The HAAs concentrations in the filtered water are most close to or reach the peak value. Using prechlorination process can promote the formation of HAAs, and the water temperature is positively correlated with the formation of HAAs.
出处
《中国给水排水》
CAS
CSCD
北大核心
2009年第3期92-94,共3页
China Water & Wastewater
关键词
供水系统
消毒副产物
卤乙酸
二氯乙酸
三氯乙酸
water supply system
disinfection by-products
haloacetic acids （HAAs）
dichloroacetic acid （DCA）
trichloroacetic acid （TCA）
