Comparative study on bisphenols oxidation via TiO2 photocatalytic activation of peroxymonosulfate: Effectiveness, mechanism and pathways

Jialin Jia; Dongmei Liu; Qiao Wang; Huarui Li; Jiaxin Ni; Fuyi Cui; Jiayu Tian

doi:10.1016/j.jhazmat.2021.127434

Comparative study on bisphenols oxidation via TiO₂ photocatalytic activation of peroxymonosulfate: Effectiveness, mechanism and pathways

J Hazard Mater. 2022 Feb 15;424(Pt B):127434. doi: 10.1016/j.jhazmat.2021.127434. Epub 2021 Oct 6.

Authors

Jialin Jia¹, Dongmei Liu², Qiao Wang³, Huarui Li¹, Jiaxin Ni¹, Fuyi Cui⁴, Jiayu Tian⁵

Affiliations

¹ State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China.
² State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China. Electronic address: ldm819@126.com.
³ State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China; School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China.
⁴ College of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400044, China.
⁵ School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, China. Electronic address: tjy800112@163.com.

PMID: 34879509
DOI: 10.1016/j.jhazmat.2021.127434

Abstract

In this work, degradation of bisphenol F (BPF), bisphenol AF (BPAF) and bisphenol S (BPS) by peroxymonosulfate (PMS) with TiO₂ nano-tubes arrays (TiO₂NTAs) under simulated sunlight irradiation was investigated and compared for the first time. All three bisphenols exhibited appreciable degradation following the order of BPS < BPAF < BPF, and acidic conditions were more conducive to their degradation. The SO₄^•-, ·OH, h⁺ and ^•O₂^- were all identified in three bisphenols degradation processes. Among these, SO₄^•- and ^•O₂^- were proven to play a dominant role in BPF oxidation process, but SO₄^•- and h⁺ were confirmed as the main reactive species for BPAF and BPS removal. Owing to the different reactive species worked in different bisphenols degradation processes, the influences of inorganic anions on three bisphenols degradation were also different. By analyzing the oxidation intermediates of the three bisphenols, it was found that there were some common degradation pathways including bond-cleavage and hydroxylation of the benzene ring shared by three bisphenols. Besides, some specific degradation pathways were also identified, for example, the self-coupling was found in BPF and BPS degradation process, while the benzene ring splitting was occurred only in BPAF transformation process.

Keywords: Bisphenol AF; Bisphenol F; Bisphenol S; Peroxymonosulfate activation; TiO(2) nano-tubes arrays.