Effects of operating conditions on disinfection by-product formation, calculated toxicity, and changes in organic matter structures during seawater chlorination

Liu，Jiajian1; Ling，Li1; Hu，Qing2; Wang，Chao2; Shang，Chii1,3

2022-07-15

10.1016/j.watres.2022.118631

WATER RESEARCH   影响因子和分区

0043-1354

1879-2448

This study systematically quantified the impacts of different operation conditions, e.g., pH, chlorine dosages, contact times, and temperatures towards the disinfection by-product (DBP) formation, integrated toxicity, and structural changes in seawater natural organic matter during seawater chlorination. Higher concentrations of total DBPs were found under longer contact times, higher chlorine dosages, higher temperatures, and lower pH. The concentration of tribromomethane, the most abundant DBP, was found lowest at pH 10. Monobromoacetic acid, dibromoacetonitrile, and dibromoacetaldehyde were the three main contributors to integrated cyto- and geno-toxicity, stressing the need to monitor DBPs based on their contributions to integrated toxicity, regardless they are regulated or nonregulated. The concentrations of total organic chlorine remained stable under different conditions, while those of total organic bromine increased with increasing contact times, chlorine dosages, and temperatures, but with decreasing pH, indicating the changes of toxicity in chlorinated seawater compared to drinking water or groundwater. Changes of ultraviolet absorbance at 254 nm and fluorescence excitation emission matrix values are useful indicators for monitoring the concentrations of high molecular weight adsorbable organic bromine and total organic halogen under all operating conditions.

Adsorbable organic halogen Disinfection by-products Integrated toxicity Natural organic matter Seawater chlorination

SCI ; EI

英语

NI论文

通讯

Natural Science Foundation of Guangdong Province[2021A1515010415];

Engineering ; Environmental Sciences & Ecology ; Water Resources

Engineering, Environmental ; Environmental Sciences ; Water Resources

WOS:000807343300010

PERGAMON-ELSEVIER SCIENCE LTD

20222212186606

Biogeochemistry ; Bromine ; Chemicals removal (water treatment) ; Chlorine ; Disinfection ; Groundwater ; Organic compounds ; Potable water ; Seawater ; Toxicity

Water Resources:444 ; Groundwater:444.2 ; Industrial Wastes:452.3 ; Health Care:461.7 ; Seawater, Tides and Waves:471.4 ; Geochemistry:481.2 ; Biochemistry:801.2 ; Chemical Reactions:802.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Organic Compounds:804.1 ; Inorganic Compounds:804.2

ENVIRONMENT/ECOLOGY

2-s2.0-85131093817

Scopus

1.Department of Civil and Environmental Engineering,the Hong Kong University of Science and Technology,Kowloon,Clear Water Bay,Hong Kong
2.School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.Hong Kong Branch of Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution,the Hong Kong University of Science and Technology,Kowloon,Clear Water Bay,Hong Kong

Liu，Jiajian,Ling，Li,Hu，Qing,et al. Effects of operating conditions on disinfection by-product formation, calculated toxicity, and changes in organic matter structures during seawater chlorination[J]. WATER RESEARCH,2022,220.

Liu，Jiajian,Ling，Li,Hu，Qing,Wang，Chao,&Shang，Chii.(2022).Effects of operating conditions on disinfection by-product formation, calculated toxicity, and changes in organic matter structures during seawater chlorination.WATER RESEARCH,220.

Liu，Jiajian,et al."Effects of operating conditions on disinfection by-product formation, calculated toxicity, and changes in organic matter structures during seawater chlorination".WATER RESEARCH 220(2022).