Accelerated Oxidation of Organic Micropollutants during Peracetic Acid Treatment in the Presence of Bromide Ions

Du, Penghui1,2,3; Liu, Wen3; Rao, Zuomin1,2; Wang, Junjian1,2

2022-02-11

10.1021/acsestwater.1c00355

ACS ES&T WATER   影响因子和分区

2690-0637

Peracetic acid (PAA), an alternative disinfectant of chlorine, has drawn increasing attention in the application of wastewater treatment. However, little is known about the influence of water matrices on PAA-induced organic micropollutant (OMP) degradation. Here, we found that the coexisting bromide ions (Br-) in water can trigger the oxidation of OMP during PAA treatment but probably result in higher ecotoxicity. Br- can efficiently decompose PAA with a species-specific rate constant (k(PAAH/Br)(-)) of 0.198 +/- 0.003 M-1.s(-1). The thus generated HOBr led to a significant abatement (31.8-81.3%) of OMPs (17 alpha-ethinylestradiol, sulfamethoxazole, naproxen, and phenol) after a 1 h reaction at pH 7.1. The coexisting H2O2 component in the PAA solution can competitively consume HOBr and inhibit OMP transformation. The OMP degradation in the PAA/Br- process was highly pH-dependent and preferred acidic conditions. Furthermore, a comprehensive model was established to simulate the reaction kinetics of the OMP degradation by the PAA/Br- process with good accuracy. High-performance/electrospray ionization-triple quadrupole mass spectrometry results indicated the generation of various brominated products, with higher model-predicted toxicity than their parent compounds. This work significantly advances the understanding of the role of Br- in OMP oxidation by PAA and alerts the possible environmental health risks.

peracetic acid organic micropollutants bromide brominated products oxidation

ESCI

英语

第一 ; 通讯

China Postdoctoral Science Foundation[2020M682777] ; National Natural Science Foundation of China[41807360,21906001] ; Guangdong Basic and Applied Basic Research Foundation["2021A1515110153","2021B1515020082"]

Environmental Sciences & Ecology ; Water Resources

Environmental Sciences ; Water Resources

WOS:000754717300008

AMER CHEMICAL SOC

Web of Science

1.Southern Univ Sci & Technol, Sch Environm Sci & Engn, State Environm Protect Key Lab Integrated Surface, Shenzhen 518055, Peoples R China
2.Southern Univ Sci & Technol, Guangdong Prov Key Lab Soil & Groundwater Pollut, Sch Environm Sci & Engn, Shenzhen 518055, Peoples R China
3.Peking Univ, Key Lab Water & Sediment Sci, Minist Educ, Coll Environm Sci & Engn, Beijing 100871, Peoples R China

Du, Penghui,Liu, Wen,Rao, Zuomin,et al. Accelerated Oxidation of Organic Micropollutants during Peracetic Acid Treatment in the Presence of Bromide Ions[J]. ACS ES&T WATER,2022,2(2).

Du, Penghui,Liu, Wen,Rao, Zuomin,&Wang, Junjian.(2022).Accelerated Oxidation of Organic Micropollutants during Peracetic Acid Treatment in the Presence of Bromide Ions.ACS ES&T WATER,2(2).

Du, Penghui,et al."Accelerated Oxidation of Organic Micropollutants during Peracetic Acid Treatment in the Presence of Bromide Ions".ACS ES&T WATER 2.2(2022).