Impact of preoxidation of UV/persulfate on disinfection byproducts by chlorination of 2,4-Di-tert-butylphenol

Qiongfang Wang; Yisheng Shao; Naiyun Gao; Wenhai Chu; Juxiang Chen; Xian Lu; Yanping Zhu; Na An

doi:10.1016/j.jhazmat.2018.06.041

Impact of preoxidation of UV/persulfate on disinfection byproducts by chlorination of 2,4-Di-tert-butylphenol

J Hazard Mater. 2018 Sep 15:358:450-458. doi: 10.1016/j.jhazmat.2018.06.041. Epub 2018 Jun 19.

Authors

Qiongfang Wang¹, Yisheng Shao², Naiyun Gao¹, Wenhai Chu¹, Juxiang Chen³, Xian Lu¹, Yanping Zhu¹, Na An¹

Affiliations

¹ State Key Laboratory of Pollution Control Reuse, Tongji University, Shanghai 200092, China.
² State Key Laboratory of Pollution Control Reuse, Tongji University, Shanghai 200092, China; China Academy of Urban Planning & Design, Beijing 100037, China. Electronic address: yishengshao2000@126.com.
³ State Key Laboratory of Pollution Control Reuse, Tongji University, Shanghai 200092, China; College of Architecture and Civil Engineering, Xinjiang University, Urumqi 830047, China.

PMID: 30036772
DOI: 10.1016/j.jhazmat.2018.06.041

Abstract

UV/persulfate (UV/PS) has been as an efficient method to remove many organic contaminants in water. However, little is known about the impact of UV/PS pretrement on the formation of disinfection byproducts (DBPs) during chlorination of 2,4-Di-tert-butylphenol (2,4-D). This research evaluated that UV/PS preoxidation of 2,4-D greatly decreased the DBPs generation during following chlorination. In the 2,4-D solution without any treatment system (O system), trichloromethane (TCM) as the only detected DBP increased with the increase of chlorine dosage. While the formation of TCM declined with the increase of PS dosage in the PS and UV/PS preoxidation systems and decreased the estimated toxicity accordingly. And it was found the residual PS in system could combine free chlorine to further oxidize 2,4-D. And intermediate products were analysed by high-performance liquid chromatography combined with triple quadrupole mass spectroscopy analysis. In the presence of bromine, the bromodichloromethane augmented first and then slowly decreased while dibromochloromethane and tribromethane increased both in O and UV/PS systems with the increase of [Br^-]. Bromine substitution was decreased by preoxidation of UV/PS. UV/PS could decrease the total-DBPs formation when used in the real water matrix contained 100 μg/L 2,4-D.

Keywords: Chlorination; Disinfection; Oxidation; Persulfate; UV.

Publication types

Research Support, Non-U.S. Gov't