Effect of chlorine dosage in prechlorination on trihalomethanes and haloacetic acids during water treatment process

• Published in: Environmental science and pollution research international Vol. 24; no. 5; pp. 5068 - 5077
• Main Authors: Niu, Zhi-Guang, Hu, Xue-Peng, Zhang, Ying, Sun, Yuan-Yuan
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.02.2017; Springer Nature B.V
• Subjects: Aquatic Pollution; Atmospheric Protection/Air Quality Control/Air Pollution; By products; Chlorine; Disinfection; Disinfection - methods; Dosage; Drinking water; Earth and Environmental Science; Ecotoxicology; Environment; Environmental Chemistry; Environmental Health; Environmental science; Haloacetic acids; Research Article; Trihalomethanes; Waste Water Technology; Water Management; Water Pollution Control; Water Purification; Water Supply; Water treatment; Haloacetic acids; Drinking water; Prechlorination; Trihalomethanes; Chlorine dosage
• ISSN: 0944-1344; 1614-7499
• DOI: 10.1007/s11356-016-8265-x

To identify the effect of chlorine dosage in prechlorination on the formation of disinfection by-products during drinking water treatment process, the relationship between chlorine dosage and concentrations of THMs and HAAs was analyzed. Furthermore, the variation about the ratio of THMs/HAAs was also analyzed. The results indicated that concentrations of THMs and HAAs would rise with the increase of chlorine dosage, and TCM was the main product of four THMs, while DCAA and TCAA were the primary products of five HAAs. Moreover, the ratio of THMs to HAAs rose with the chlorine dosage increase. Thus, chlorine dosage in prechlorination had a significant impact on THMs and HAAs and should be controlled effectively.