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A comparative study of UV/H2O2 and UV/PDS for the degradation of micro-pollutants: kinetics and effect of water matrix.
Environ Sci Pollut Res Int. 2020 Jul; 27(19):24531-24541.ES

Abstract

Organic micro-pollutants such as pesticides and endocrine disruptors cause serious harm to human health and aquatic ecosystem. In this study, the potential degradation of atrazine (ATZ), triclosan (TCS), and 2,4,6-trichloroanisole (TCA) by UV-activated peroxydisulfate (UV/PDS) and UV-activated H2O2 (UV/H2O2) processes were evaluated under different conditions. Results showed that UV/PDS process was more effective than UV/H2O2 under the same conditions. Increasing oxidant dosage or decreasing the initial ATZ, TCS, and TCA concentrations promoted the degradation rates of these three compounds. The presence of natural organic matter (NOM) could effectively scavenge sulfate radical (SO4•-) and hydroxyl radical (HO•) and reduced the removal rates of target compounds. Degradation rates of ATZ and TCA decreased with pH increasing from 5.0 to 9.0 in UV/PDS process, while in UV/H2O2 process, the increase of solution pH had little effect on ATZ and TCA degradation. In the UV/PDS and UV/H2O2 oxidation process, when the solution pH increased from 5 to 8, the removal rates of TCS decreased by 19% and 1%, while when the solution pH increased to 9, the degradation rates of TCS increased by 23% and 17%. CO32-/HCO3- had a small inhibitory effect on ATZ and TCA degradation by UV/H2O2 and UV/PDS processes but promoted the degradation of TCS significantly (> 2 mM). Cl- had little effect on the degradation of ATZ, TCA, and TCS in UV/H2O2 process. Cl- significant inhibited on the degradation of ATZ and TCS, but the influence of Cl- on the degradation of TCA was weak in UV/PDS process. Based on these experimental results, the various contributions of those secondary radicals (i.e., carbonate radical, chlorine radical) were discussed. This study can contribute to better understand the reactivities when UV/PDS and UV/H2O2 are applied for the treatment of micro-pollutant-containing waters.

Authors+Show Affiliations

School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, 250010, China.School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, 250010, China. luocongwei2009@163.com.Shandong Electric Power Engineering Consulting Institute Corp., LTD., Jinan, 250010, China.School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, 250010, China. wdj@sdjzu.edu.cn.School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, 250010, China.School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, 250010, China.School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, 250010, China.School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, 250010, China.School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, 250010, China.State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32306270

Citation

Gao, Jing, et al. "A Comparative Study of UV/H2O2 and UV/PDS for the Degradation of Micro-pollutants: Kinetics and Effect of Water Matrix." Environmental Science and Pollution Research International, vol. 27, no. 19, 2020, pp. 24531-24541.
Gao J, Luo C, Gan L, et al. A comparative study of UV/H2O2 and UV/PDS for the degradation of micro-pollutants: kinetics and effect of water matrix. Environ Sci Pollut Res Int. 2020;27(19):24531-24541.
Gao, J., Luo, C., Gan, L., Wu, D., Tan, F., Cheng, X., Zhou, W., Wang, S., Zhang, F., & Ma, J. (2020). A comparative study of UV/H2O2 and UV/PDS for the degradation of micro-pollutants: kinetics and effect of water matrix. Environmental Science and Pollution Research International, 27(19), 24531-24541. https://doi.org/10.1007/s11356-020-08794-1
Gao J, et al. A Comparative Study of UV/H2O2 and UV/PDS for the Degradation of Micro-pollutants: Kinetics and Effect of Water Matrix. Environ Sci Pollut Res Int. 2020;27(19):24531-24541. PubMed PMID: 32306270.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - A comparative study of UV/H2O2 and UV/PDS for the degradation of micro-pollutants: kinetics and effect of water matrix. AU - Gao,Jing, AU - Luo,Congwei, AU - Gan,Lu, AU - Wu,Daoji, AU - Tan,Fengxun, AU - Cheng,Xiaoxiang, AU - Zhou,Weiwei, AU - Wang,Shishun, AU - Zhang,Fumiao, AU - Ma,Jun, Y1 - 2020/04/19/ PY - 2019/09/11/received PY - 2020/04/06/accepted PY - 2020/4/20/pubmed PY - 2020/7/11/medline PY - 2020/4/20/entrez KW - Degradation kinetics KW - H2O2 KW - Organic micro-pollutants KW - Persulfate KW - Ultraviolet SP - 24531 EP - 24541 JF - Environmental science and pollution research international JO - Environ Sci Pollut Res Int VL - 27 IS - 19 N2 - Organic micro-pollutants such as pesticides and endocrine disruptors cause serious harm to human health and aquatic ecosystem. In this study, the potential degradation of atrazine (ATZ), triclosan (TCS), and 2,4,6-trichloroanisole (TCA) by UV-activated peroxydisulfate (UV/PDS) and UV-activated H2O2 (UV/H2O2) processes were evaluated under different conditions. Results showed that UV/PDS process was more effective than UV/H2O2 under the same conditions. Increasing oxidant dosage or decreasing the initial ATZ, TCS, and TCA concentrations promoted the degradation rates of these three compounds. The presence of natural organic matter (NOM) could effectively scavenge sulfate radical (SO4•-) and hydroxyl radical (HO•) and reduced the removal rates of target compounds. Degradation rates of ATZ and TCA decreased with pH increasing from 5.0 to 9.0 in UV/PDS process, while in UV/H2O2 process, the increase of solution pH had little effect on ATZ and TCA degradation. In the UV/PDS and UV/H2O2 oxidation process, when the solution pH increased from 5 to 8, the removal rates of TCS decreased by 19% and 1%, while when the solution pH increased to 9, the degradation rates of TCS increased by 23% and 17%. CO32-/HCO3- had a small inhibitory effect on ATZ and TCA degradation by UV/H2O2 and UV/PDS processes but promoted the degradation of TCS significantly (> 2 mM). Cl- had little effect on the degradation of ATZ, TCA, and TCS in UV/H2O2 process. Cl- significant inhibited on the degradation of ATZ and TCS, but the influence of Cl- on the degradation of TCA was weak in UV/PDS process. Based on these experimental results, the various contributions of those secondary radicals (i.e., carbonate radical, chlorine radical) were discussed. This study can contribute to better understand the reactivities when UV/PDS and UV/H2O2 are applied for the treatment of micro-pollutant-containing waters. SN - 1614-7499 UR - https://www.unboundmedicine.com/medline/citation/32306270/A_comparative_study_of_UV/H2O2_and_UV/PDS_for_the_degradation_of_micro_pollutants:_kinetics_and_effect_of_water_matrix_ L2 - https://dx.doi.org/10.1007/s11356-020-08794-1 DB - PRIME DP - Unbound Medicine ER -