Disinfection By-products Formation Potential of in Different Drinking Water Treatment Processes
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
9 9
Page:
27-35
Column:
Date of publication:
2020-05-01
- Keywords:
- font-size: 10pt; ">drinking water treatment; disinfection by- font-size: 10pt; ">products; formation potential; Br-; cytotoxicity
- Abstract:
-
Water samples from different drinking water treatment processes were treated by chlorination and chloramination respectively, and the effects of different drinking water treatment processes on disinfection by- products (DBPs) formation potential belonging to 7 classes and 18 species were analyzed. The DBPs included carbonaceous DBPs such as trihalomethanes (THMs), haloacetic acids (HAAs), haloketones (HKs) and chloral hydrate (CH), and nitrogenous DBPs［such as haloacetonitriles (HANs), trichloronitromethane (TCNM) and total N-nitrosamines (TONO)］.The formation potential of many halogenated DBPs could be effectively reduced by coagulation/sedimentation and filtration process, whereas activated carbon process greatly increased the formation potential of TONO. Coagulation and sand filtration processes were more effective in removing precursor of carbonaceous DBPs, while oxidation process was more beneficial to remove precursor of nitrogenous DBPs. The cytotoxicity mainly originated from HANs and HAAs,and its changing trend was roughly consistent with the formation potential of HANs and HAAs. The increase of Br- concentration in water significantly increased the formation of brominated DBPs and greatly increased the cytotoxicity.
Last Update:
2020-05-01