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Effects of reductive inorganics and NOM on the formation of chlorite in the chlorine dioxide disinfection of drinking water.
J Environ Sci (China). 2021 Jun; 104:225-232.JE

Abstract

Chlorine dioxide (ClO2) disinfection usually does not produce halogenated disinfection by-products, but the formation of the inorganic by-product chlorite (ClO2-) is a serious consideration. In this study, the ClO2- formation rule in the ClO2 disinfection of drinking water was investigated in the presence of three representative reductive inorganics and four natural organic matters (NOMs), respectively. Fe2+ and S2- mainly reduced ClO2 to ClO2- at low concentrations. When ClO2 was consumed, the ClO2- would be further reduced by Fe2+ and S2-, leading to the decrease of ClO2-. The reaction efficiency of Mn2+ with ClO2 was lower than that of Fe2+ and S2-. It might be the case that MnO2 generated by the reaction between Mn2+ and ClO2 had adsorption and catalytic oxidation on Mn2+. However, Mn2+ would not reduce ClO2-. Among the four NOMs, humic acid and fulvic acid reacted with ClO2 actively, followed by bovine serum albumin, while sodium alginate had almost no reaction with ClO2. The maximum ClO2- yields of reductive inorganics (70%) was higher than that of NOM (around 60%). The lower the concentration of reductive substances, the more ClO2- could be produced by per unit concentration of reductive substances. The results of the actual water samples showed that both reductive inorganics and NOM played an important role in the formation of ClO2- in disinfection.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Yang B
Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science & Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China.
Fang H
Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science & Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China. Electronic address: fanghua@nuist.edu.cn.
Chen B
Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science & Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China.
Yang S
Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science & Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China.
Ye Z
Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science & Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China.
Yu J
Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science & Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China.

MeSH

ChloridesChlorineChlorine CompoundsDisinfectantsDisinfectionDrinking WaterManganese CompoundsOxidesWater Purification

Pub Type(s)

Journal Article

Language

eng

PubMed ID

33985725

Citation

Yang, Biao, et al. "Effects of Reductive Inorganics and NOM On the Formation of Chlorite in the Chlorine Dioxide Disinfection of Drinking Water." Journal of Environmental Sciences (China), vol. 104, 2021, pp. 225-232.
Yang B, Fang H, Chen B, et al. Effects of reductive inorganics and NOM on the formation of chlorite in the chlorine dioxide disinfection of drinking water. J Environ Sci (China). 2021;104:225-232.
Yang, B., Fang, H., Chen, B., Yang, S., Ye, Z., & Yu, J. (2021). Effects of reductive inorganics and NOM on the formation of chlorite in the chlorine dioxide disinfection of drinking water. Journal of Environmental Sciences (China), 104, 225-232. https://doi.org/10.1016/j.jes.2020.11.033
Yang B, et al. Effects of Reductive Inorganics and NOM On the Formation of Chlorite in the Chlorine Dioxide Disinfection of Drinking Water. J Environ Sci (China). 2021;104:225-232. PubMed PMID: 33985725.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of reductive inorganics and NOM on the formation of chlorite in the chlorine dioxide disinfection of drinking water. AU - Yang,Biao, AU - Fang,Hua, AU - Chen,Bingqi, AU - Yang,Shun, AU - Ye,Zhichao, AU - Yu,Jianghua, Y1 - 2020/12/22/ PY - 2020/08/29/received PY - 2020/11/26/revised PY - 2020/11/28/accepted PY - 2021/5/14/entrez PY - 2021/5/15/pubmed PY - 2021/5/18/medline KW - Chlorine dioxide KW - Chlorite KW - Disinfection by-products KW - Natural organic matter KW - Reductive inorganics SP - 225 EP - 232 JF - Journal of environmental sciences (China) JO - J Environ Sci (China) VL - 104 N2 - Chlorine dioxide (ClO2) disinfection usually does not produce halogenated disinfection by-products, but the formation of the inorganic by-product chlorite (ClO2-) is a serious consideration. In this study, the ClO2- formation rule in the ClO2 disinfection of drinking water was investigated in the presence of three representative reductive inorganics and four natural organic matters (NOMs), respectively. Fe2+ and S2- mainly reduced ClO2 to ClO2- at low concentrations. When ClO2 was consumed, the ClO2- would be further reduced by Fe2+ and S2-, leading to the decrease of ClO2-. The reaction efficiency of Mn2+ with ClO2 was lower than that of Fe2+ and S2-. It might be the case that MnO2 generated by the reaction between Mn2+ and ClO2 had adsorption and catalytic oxidation on Mn2+. However, Mn2+ would not reduce ClO2-. Among the four NOMs, humic acid and fulvic acid reacted with ClO2 actively, followed by bovine serum albumin, while sodium alginate had almost no reaction with ClO2. The maximum ClO2- yields of reductive inorganics (70%) was higher than that of NOM (around 60%). The lower the concentration of reductive substances, the more ClO2- could be produced by per unit concentration of reductive substances. The results of the actual water samples showed that both reductive inorganics and NOM played an important role in the formation of ClO2- in disinfection. SN - 1001-0742 UR - https://www.unboundmedicine.com/medline/citation/33985725/Effects_of_reductive_inorganics_and_NOM_on_the_formation_of_chlorite_in_the_chlorine_dioxide_disinfection_of_drinking_water_ DB - PRIME DP - Unbound Medicine ER -