摘要
以浙江省钱塘江流域的七种水源水为代表,分析了前体物、pH值、投氯量、氯化时间和温度等因素对氯化消毒副产物(DBPs)中三种卤乙酸(HAAs)和三种三卤甲烷(THMs)的影响.研究表明,总有机碳(TOC)和UV-254与HAAs前体物呈正相关,而与THMs前体物的相关性较差;在pH5-10的范围内,pH值对HAAs的形成影响较小,pH值愈高HAAs总量愈小,而对THMs的形成影响较大,THMs总量随pH值的增高而增大;HAAs和THMs的形成量与投氯量、氯化时间均呈正相关;在正常气温条件下,随温度的增加而增加.
THMs and HAAs, which are two types of disinfection by-products ( DBPs) , were studied in the water samples from Qiantang river in Zhejiang province. The results showed that haloacetic acids (HAAs) and trihalo- methane (THMs) are different with variable conditions of DBPs precursors, water temperature, applied chlorine dose, reaction time and pH. TOC and UV-254 had a high correlation with HAAs precursors, but low with THMs precursors. The total THMs concentration increases with increasing pH value in range of 5-10, but the total HAAs concentration slightly decreases with increasing pH value, the chlorine dose and reaction time have a functional relationship with the formation of HAAs and THMs, and the concentration of HAAs and THMs also increased with increasing temperature in the normal range.
出处
《环境化学》
CAS
CSCD
北大核心
2005年第4期434-437,共4页
Environmental Chemistry
基金
浙江省科技计划项目(项目编号:2003C33040).
