Tags

Type your tag names separated by a space and hit enter

Multi-angle comparison of UV/chlorine, UV/monochloramine, and UV/chlorine dioxide processes for water treatment and reuse.
Water Res. 2022 Jun 15; 217:118414.WR

Abstract

Advanced oxidation processes (AOPs) have been increasingly studied and practiced for micropollutant abatement in drinking water treatment and potable water reuse. This study conducted the multi-angle comparison of the UV/chlorine, UV/monochloramine (UV/NH2Cl), and UV/chlorine dioxide (UV/ClO2) AOPs with respect to reactive species generation, micropollutant degradation, byproduct formation, and toxicity change. The concentrations of radicals (HO·, Cl·, and ClO·) generated in the three AOPs followed the order of UV/chlorine > UV/NH2Cl > UV/ClO2 at an oxidant dose of 70 μM, an irradiation wavelength of 254 nm, and a pH of 7.5. The concentration of ozone generated in the UV/ClO2 AOP was higher than that in the UV/chlorine AOP, while ozone was not generated in the UV/NH2Cl AOP. The effects of pH (pH 6.0, 7.5, and 9.0) and UV wavelength (254 nm, 285 nm, and 300 nm) on the three AOPs were evaluated and compared. Using the radical and ozone concentrations determined in this study, the pseudo-first-order degradation rate constants of 24 micropollutants by the three AOPs were predicted and compared. When the three AOPs were used to treat the water containing the same concentration of natural organic matter, the formation of total organic chlorine (TOCl) and the organic byproduct-associated toxicity followed the same order of UV/chlorine > UV/NH2Cl > UV/ClO2. On the contrary, the inorganic byproduct-associated toxicity followed the order of UV/ClO2 > UV/chlorine > UV/NH2Cl, due to the high concentrations of chlorite and chlorate formed in the UV/ClO2 AOP. Findings in this study offer fundamental information useful for the selection and operation of AOPs for micropollutant abatement in drinking water treatment and potable water reuse.

Links

Publisher Full Text (DOI)

Authors+Show Affiliations

Zhao J
Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.
Peng J
Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.
Yin R
Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China. Electronic address: ryin@connect.ust.hk.
Fan M
School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China.
Yang X
School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510275, China.
Shang C
Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China; Hong Kong Branch of Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China. Electronic address: cechii@ust.hk.

MeSH

ChloraminesChlorineChlorine CompoundsDisinfectionDrinking WaterOxidation-ReductionOxidesOzoneUltraviolet RaysWater Pollutants, ChemicalWater Purification

Pub Type(s)

Journal Article

Language

eng

PubMed ID

35429880

Citation

Zhao, Jing, et al. "Multi-angle Comparison of UV/chlorine, UV/monochloramine, and UV/chlorine Dioxide Processes for Water Treatment and Reuse." Water Research, vol. 217, 2022, p. 118414.
Zhao J, Peng J, Yin R, et al. Multi-angle comparison of UV/chlorine, UV/monochloramine, and UV/chlorine dioxide processes for water treatment and reuse. Water Res. 2022;217:118414.
Zhao, J., Peng, J., Yin, R., Fan, M., Yang, X., & Shang, C. (2022). Multi-angle comparison of UV/chlorine, UV/monochloramine, and UV/chlorine dioxide processes for water treatment and reuse. Water Research, 217, 118414. https://doi.org/10.1016/j.watres.2022.118414
Zhao J, et al. Multi-angle Comparison of UV/chlorine, UV/monochloramine, and UV/chlorine Dioxide Processes for Water Treatment and Reuse. Water Res. 2022 Jun 15;217:118414. PubMed PMID: 35429880.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Multi-angle comparison of UV/chlorine, UV/monochloramine, and UV/chlorine dioxide processes for water treatment and reuse. AU - Zhao,Jing, AU - Peng,Jiadong, AU - Yin,Ran, AU - Fan,Mengge, AU - Yang,Xin, AU - Shang,Chii, Y1 - 2022/04/06/ PY - 2021/09/27/received PY - 2021/12/31/revised PY - 2022/04/04/accepted PY - 2022/4/17/pubmed PY - 2022/5/18/medline PY - 2022/4/16/entrez KW - Advanced oxidation process KW - Chlorine-based disinfectants KW - Disinfection byproducts (DBPs) KW - Micropollutants KW - UV wavelength SP - 118414 EP - 118414 JF - Water research JO - Water Res VL - 217 N2 - Advanced oxidation processes (AOPs) have been increasingly studied and practiced for micropollutant abatement in drinking water treatment and potable water reuse. This study conducted the multi-angle comparison of the UV/chlorine, UV/monochloramine (UV/NH2Cl), and UV/chlorine dioxide (UV/ClO2) AOPs with respect to reactive species generation, micropollutant degradation, byproduct formation, and toxicity change. The concentrations of radicals (HO·, Cl·, and ClO·) generated in the three AOPs followed the order of UV/chlorine > UV/NH2Cl > UV/ClO2 at an oxidant dose of 70 μM, an irradiation wavelength of 254 nm, and a pH of 7.5. The concentration of ozone generated in the UV/ClO2 AOP was higher than that in the UV/chlorine AOP, while ozone was not generated in the UV/NH2Cl AOP. The effects of pH (pH 6.0, 7.5, and 9.0) and UV wavelength (254 nm, 285 nm, and 300 nm) on the three AOPs were evaluated and compared. Using the radical and ozone concentrations determined in this study, the pseudo-first-order degradation rate constants of 24 micropollutants by the three AOPs were predicted and compared. When the three AOPs were used to treat the water containing the same concentration of natural organic matter, the formation of total organic chlorine (TOCl) and the organic byproduct-associated toxicity followed the same order of UV/chlorine > UV/NH2Cl > UV/ClO2. On the contrary, the inorganic byproduct-associated toxicity followed the order of UV/ClO2 > UV/chlorine > UV/NH2Cl, due to the high concentrations of chlorite and chlorate formed in the UV/ClO2 AOP. Findings in this study offer fundamental information useful for the selection and operation of AOPs for micropollutant abatement in drinking water treatment and potable water reuse. SN - 1879-2448 UR - https://www.unboundmedicine.com/medline/citation/35429880/Multi_angle_comparison_of_UV/chlorine_UV/monochloramine_and_UV/chlorine_dioxide_processes_for_water_treatment_and_reuse_ DB - PRIME DP - Unbound Medicine ER -
Grapherence [↓1]

Related Citations

More