Disinfection by-products and their precursors in a water treatment plant in North China: Seasonal changes and fraction analysis

作者：Chen Chao^*; Zhang Xiao jian; Zhu Ling xia; Liu Jing; He Wen jie; Han Hong da

来源：Science of the Total Environment, 2008, 397(1-3): 140-147.

DOI：10.1016/j.scitotenv.2008.02.032

• disinfection by-product
• precursor
• organic fraction
• algae
• trihalomethane
• haloacetic acid
• conventional treatment process

A one-year-long monitoring project was conducted to assay the concentrations of THMs, HAAS and their formation potential along the conventional process in a water treatment plant in North China. Subsequent investigations of organic matter fractionation and the contribution of the algae to the precursor were also conducted to trace the source of the DBPs. The results showed that the concentration of DBPs and their formation potential varied with the seasons. The highest concentrations of THMs and the highest HAAs formation potential, each almost 500 mu g/L, were detected in autumn and the lowest were in spring, no more than 100 mu g/L. Both organic matter and algae were found to be important DBP precursors. The hydrophobic acid fraction in dissolved organic matter has the highest formation potential for both THM and HAA. Algae contribute about 20% to 50% of the total formation potential during an algal bloom. The efficiency of each unit process for DBPs and precursors was also assayed. Unfortunately, the conventional drinking water treatment process is limited in its efficiency for precursor removal. The pre-chlorination and filtration process had a negative effect on DBP or precursor removal.

• 出版日期2008-7-1
• 单位清华大学