Tags

Type your tag names separated by a space and hit enter

Superfast degradation of micropollutants in water by reactive species generated from the reaction between chlorine dioxide and sulfite.
Water Res. 2022 Aug 15; 222:118886.WR

Abstract

Chlorine dioxide (ClO2) is used as an oxidant or disinfectant in (waste)water treatment, whereas sulfite is a prevalent reducing agent to quench the excess ClO2. This study demonstrated that seven micropollutants with structural diversity could be rapidly degraded in the reaction between ClO2 and sulfite under environmentally relevant conditions in synthetic and real drinking water. For example, carbamazepine, which is recalcitrant to standalone ClO2 or sulfite, was degraded by 55%-80% in 10 s in the ClO2/sulfite process at 30-µM ClO2 and 30-µM sulfite concentrations within a pH range of 6.0-11.0. Results from experiments and a kinetic model supported that chlorine monoxide (ClO·) and sulfate radicals (SO4·-) were generated in the ClO2/sulfite process, while hydroxyl radical generation was insignificant. Apart from radicals, dichlorine trioxide (Cl2O3) was generated and largely contributed to micropollutant degradation, supported by experimental results using stopped-flow spectrometry and quantum chemical calculations. The impacts of pH, sulfite dosage, and water matrix components (chloride, bicarbonate, and natural organic matter) on micropollutant abatement in the ClO2/sulfite process were evaluated and discussed. When treating the real potable water, the concentrations of organic (five regulated disinfection byproducts) and inorganic byproducts (chlorite and chlorate) formed in the ClO2/sulfite process were all below the drinking water standards. This study disclosed fundamental knowledge advancements relevant to the reaction mechanisms between ClO2 and sulfite, and highlighed a novel process to abate micropollutants in water and wastewater.

Links

Publisher Full Text (DOI)

Authors+Show Affiliations

Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 999066, China; Advanced Interdisciplinary Institute of Environment and Ecology, Beijing Normal University at Zhu Hai, Zhu Hai, Hong Kong 519087, China.

Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 999066, China.

Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 999066, China.

Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 999066, China.

Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 999066, China; Advanced Interdisciplinary Institute of Environment and Ecology, Beijing Normal University at Zhu Hai, Zhu Hai, Hong Kong 519087, China.

Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 999066, China.

Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 999066, China.

School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou, Hong Kong 510275, China.

Advanced Interdisciplinary Institute of Environment and Ecology, Beijing Normal University at Zhu Hai, Zhu Hai, Hong Kong 519087, China.

Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 999066, China.

Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 999066, China. Electronic address: ryin@connect.ust.hk.

MeSH

ChlorineChlorine CompoundsDisinfectionDrinking WaterOxidation-ReductionOxidesSulfitesWater Pollutants, ChemicalWater Purification

Pub Type(s)

Journal Article

Language

eng

PubMed ID

35917667

Citation

Li, Juan, et al. "Superfast Degradation of Micropollutants in Water By Reactive Species Generated From the Reaction Between Chlorine Dioxide and Sulfite." Water Research, vol. 222, 2022, p. 118886.

Li J, Cassol GS, Zhao J, et al. Superfast degradation of micropollutants in water by reactive species generated from the reaction between chlorine dioxide and sulfite. Water Res. 2022;222:118886.

Li, J., Cassol, G. S., Zhao, J., Sato, Y., Jing, B., Zhang, Y., Shang, C., Yang, X., Ao, Z., Chen, G., & Yin, R. (2022). Superfast degradation of micropollutants in water by reactive species generated from the reaction between chlorine dioxide and sulfite. Water Research, 222, 118886. https://doi.org/10.1016/j.watres.2022.118886

Li J, et al. Superfast Degradation of Micropollutants in Water By Reactive Species Generated From the Reaction Between Chlorine Dioxide and Sulfite. Water Res. 2022 Aug 15;222:118886. PubMed PMID: 35917667.

* Article titles in AMA citation format should be in sentence-case

TY - JOUR T1 - Superfast degradation of micropollutants in water by reactive species generated from the reaction between chlorine dioxide and sulfite. AU - Li,Juan, AU - Cassol,Gabriela Scheibel, AU - Zhao,Jing, AU - Sato,Yugo, AU - Jing,Binghua, AU - Zhang,Yuliang, AU - Shang,Chii, AU - Yang,Xin, AU - Ao,Zhimin, AU - Chen,Guanghao, AU - Yin,Ran, Y1 - 2022/07/21/ PY - 2022/05/02/received PY - 2022/06/25/revised PY - 2022/07/19/accepted PY - 2022/8/3/pubmed PY - 2022/9/1/medline PY - 2022/8/2/entrez KW - Advanced oxidation process KW - Chlorine dioxide KW - DFT calculation KW - Disinfection byproducts KW - Micropollutants KW - Sulfite SP - 118886 EP - 118886 JF - Water research JO - Water Res VL - 222 N2 - Chlorine dioxide (ClO2) is used as an oxidant or disinfectant in (waste)water treatment, whereas sulfite is a prevalent reducing agent to quench the excess ClO2. This study demonstrated that seven micropollutants with structural diversity could be rapidly degraded in the reaction between ClO2 and sulfite under environmentally relevant conditions in synthetic and real drinking water. For example, carbamazepine, which is recalcitrant to standalone ClO2 or sulfite, was degraded by 55%-80% in 10 s in the ClO2/sulfite process at 30-µM ClO2 and 30-µM sulfite concentrations within a pH range of 6.0-11.0. Results from experiments and a kinetic model supported that chlorine monoxide (ClO·) and sulfate radicals (SO4·-) were generated in the ClO2/sulfite process, while hydroxyl radical generation was insignificant. Apart from radicals, dichlorine trioxide (Cl2O3) was generated and largely contributed to micropollutant degradation, supported by experimental results using stopped-flow spectrometry and quantum chemical calculations. The impacts of pH, sulfite dosage, and water matrix components (chloride, bicarbonate, and natural organic matter) on micropollutant abatement in the ClO2/sulfite process were evaluated and discussed. When treating the real potable water, the concentrations of organic (five regulated disinfection byproducts) and inorganic byproducts (chlorite and chlorate) formed in the ClO2/sulfite process were all below the drinking water standards. This study disclosed fundamental knowledge advancements relevant to the reaction mechanisms between ClO2 and sulfite, and highlighed a novel process to abate micropollutants in water and wastewater. SN - 1879-2448 UR - https://www.unboundmedicine.com/medline/citation/35917667/Superfast_degradation_of_micropollutants_in_water_by_reactive_species_generated_from_the_reaction_between_chlorine_dioxide_and_sulfite_ DB - PRIME DP - Unbound Medicine ER -