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Using UV/H2O2 pre-oxidation combined with an optimised disinfection scenario to control CX3R-type disinfection by-product formation.
Water Res. 2019 Dec 15; 167:115096.WR

Abstract

The effects of UV/H2O2 pre-oxidation or disinfection methods on the formation of partial disinfection by-products (DBPs) have been studied previously. This study assessed the effect of UV/H2O2 pre-oxidation combined with optimisation of the disinfection method on the formation of six classes of CX3R-type DBPs, including trihalomethanes (THMs), haloacetic acids (HAAs), haloacetaldehydes (HALs), haloacetonitriles (HANs), halonitromethanes (HNMs), and haloacetamides (HAMs). Experimental results showed that a simulated distribution system (SDS) in-situ chloramination or pre-chlorination followed by chloramination effectively decreased total CX3R-type DBP formation by 51.1-63.5% compared to SDS chlorination, but little reduction in DBP-associated toxicity was observed. The dominant contributors to the calculated toxicity were HANs and HALs. UV/H2O2 pre-oxidation was able to destroy the aromatic and dissolved organic nitrogen components of natural organic matter. As a consequence, THM, HAA, and HAL formations increased by 49.5-55.0%, 47.8-61.9%, and 42.0-67.1%, respectively, whereas HAN, HNM, and HAM formations significantly decreased by 52.1-83.6%, 42.9-87.3%, and 74.1-100.0%. UV/H2O2 pre-oxidation increased total CX3R-type DBP formation, during SDS chlorination, whereas SDS in-situ chloramination or pre-chlorination followed by chloramination of UV/H2O2-treated water produced lower total CX3R-type DBPs than water without UV/H2O2 pre-oxidation. Nevertheless, the DBP-associated toxicity of water with UV/H2O2 pre-oxidation was substantially lower than the toxicity for water without UV/H2O2 pre-oxidation, decreased by 24.1-82.7%. HALs followed by HANs contribute to major toxic potencies in UV/H2O2 treated water. The best DBP concentration and DBP-associated toxicity abatement results were achieved for water treated by UV/H2O2 coupled with in-situ chloramination treatment.

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Authors+Show Affiliations

Ding S
State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China; Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, Shanghai, 200092, China.
Wang F
School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China.
Chu W
State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China; Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, Shanghai, 200092, China. Electronic address: feedwater@126.com.
Fang C
State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China; Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, Shanghai, 200092, China.
Pan Y
State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, Jiangsu province, China.
Lu S
China Institute of Building Standard Design & Research co., LTD, Beijing, 100048, China.
Gao N
State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China.

MeSH

ChlorineDisinfectantsDisinfectionHalogenationHydrogen PeroxideTrihalomethanesWater Pollutants, ChemicalWater Purification

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31577966

Citation

Ding, Shunke, et al. "Using UV/H2O2 Pre-oxidation Combined With an Optimised Disinfection Scenario to Control CX3R-type Disinfection By-product Formation." Water Research, vol. 167, 2019, p. 115096.
Ding S, Wang F, Chu W, et al. Using UV/H2O2 pre-oxidation combined with an optimised disinfection scenario to control CX3R-type disinfection by-product formation. Water Res. 2019;167:115096.
Ding, S., Wang, F., Chu, W., Fang, C., Pan, Y., Lu, S., & Gao, N. (2019). Using UV/H2O2 pre-oxidation combined with an optimised disinfection scenario to control CX3R-type disinfection by-product formation. Water Research, 167, 115096. https://doi.org/10.1016/j.watres.2019.115096
Ding S, et al. Using UV/H2O2 Pre-oxidation Combined With an Optimised Disinfection Scenario to Control CX3R-type Disinfection By-product Formation. Water Res. 2019 Dec 15;167:115096. PubMed PMID: 31577966.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Using UV/H2O2 pre-oxidation combined with an optimised disinfection scenario to control CX3R-type disinfection by-product formation. AU - Ding,Shunke, AU - Wang,Feifei, AU - Chu,Wenhai, AU - Fang,Chao, AU - Pan,Yang, AU - Lu,Shan, AU - Gao,Naiyun, Y1 - 2019/09/17/ PY - 2019/05/27/received PY - 2019/08/22/revised PY - 2019/09/14/accepted PY - 2019/10/3/pubmed PY - 2019/12/4/medline PY - 2019/10/3/entrez KW - CX(3)R-type disinfection by-products KW - Disinfectant addition method KW - Predicted toxicity KW - UV/H(2)O(2) SP - 115096 EP - 115096 JF - Water research JO - Water Res VL - 167 N2 - The effects of UV/H2O2 pre-oxidation or disinfection methods on the formation of partial disinfection by-products (DBPs) have been studied previously. This study assessed the effect of UV/H2O2 pre-oxidation combined with optimisation of the disinfection method on the formation of six classes of CX3R-type DBPs, including trihalomethanes (THMs), haloacetic acids (HAAs), haloacetaldehydes (HALs), haloacetonitriles (HANs), halonitromethanes (HNMs), and haloacetamides (HAMs). Experimental results showed that a simulated distribution system (SDS) in-situ chloramination or pre-chlorination followed by chloramination effectively decreased total CX3R-type DBP formation by 51.1-63.5% compared to SDS chlorination, but little reduction in DBP-associated toxicity was observed. The dominant contributors to the calculated toxicity were HANs and HALs. UV/H2O2 pre-oxidation was able to destroy the aromatic and dissolved organic nitrogen components of natural organic matter. As a consequence, THM, HAA, and HAL formations increased by 49.5-55.0%, 47.8-61.9%, and 42.0-67.1%, respectively, whereas HAN, HNM, and HAM formations significantly decreased by 52.1-83.6%, 42.9-87.3%, and 74.1-100.0%. UV/H2O2 pre-oxidation increased total CX3R-type DBP formation, during SDS chlorination, whereas SDS in-situ chloramination or pre-chlorination followed by chloramination of UV/H2O2-treated water produced lower total CX3R-type DBPs than water without UV/H2O2 pre-oxidation. Nevertheless, the DBP-associated toxicity of water with UV/H2O2 pre-oxidation was substantially lower than the toxicity for water without UV/H2O2 pre-oxidation, decreased by 24.1-82.7%. HALs followed by HANs contribute to major toxic potencies in UV/H2O2 treated water. The best DBP concentration and DBP-associated toxicity abatement results were achieved for water treated by UV/H2O2 coupled with in-situ chloramination treatment. SN - 1879-2448 UR - https://www.unboundmedicine.com/medline/citation/31577966/Using_UV/H2O2_pre_oxidation_combined_with_an_optimised_disinfection_scenario_to_control_CX3R_type_disinfection_by_product_formation_ DB - PRIME DP - Unbound Medicine ER -