Transformation of dissolved organic matter during UV/peracetic acid treatment

Du，Penghui1,2; Liu，Wen3; Zhang，Qiang1,2; Zhang，Peng1,2; He，Chen4; Shi，Quan4; Huang，Ching Hua5; Wang，Junjian1,2

2023-04-01

10.1016/j.watres.2023.119676

WATER RESEARCH   Impact Factor & Quartile

0043-1354

1879-2448

Peracetic acid combined ultraviolet (UV/PAA) process has garnered growing attention as a promising advanced oxidation process (AOP) for wastewater treatment, but the corresponding transformation of ubiquitous dissolved organic matter (DOM) under this AOP remains unknown. This study systematically investigated the changes in characteristics and composition of DOM under UV/PAA, as well as the underlying mechanisms by multiple spectroscopic analyses and Fourier transform ion cyclotron resonance mass spectrometry. UV/PAA treatment dramatically decreased aromaticity, apparent molecular weight, and fluorescent abundance of DOM with the production of more oxidized and saturated compounds. The reactive species (i.e., OH and CHC(O)O/CHC(O)OO) in UV/PAA contributed primarily to DOM changes but showed different reaction selectivity and mechanisms. OH reacts with DOM components and mainly yields oxygenation products via a radical addition pathway. Comparatively, the electron transfer route is more likely to occur in CHC(O)O/CHC(O)OO-induced DOM transformation. Aside from oxygenation products, electron transfer could exclusively generate decarboxylation products and distinguishes CHC(O)O/CHC(O)OO-based AOPs from OH-based AOPs. These findings significantly improve knowledge of DOM alterations under UV/PAA AOP at both the bulk and molecular levels.

Advanced oxidation process Dissolved organic matter ESI FT-ICR MS Peracetic acid Wastewater treatment

SCI

English

NI Journal Papers

First ; Corresponding

National Key Research and Development Program of China[2021YFA1202500] ; Na- tional Natural Science Foundation of China["22206070","42122054","42192513"] ; Guangdong Basic and Applied Basic Research Foundation["2021A1515110153","2021B1515020082"] ; Guangdong Provincial Education Department[2020KCXTD006] ; Shenzhen Science and Technology Innovation Commission[JCYJ20220818100403007]

Engineering ; Environmental Sciences & Ecology ; Water Resources

Engineering, Environmental ; Environmental Sciences ; Water Resources

WOS:000931805300001

PERGAMON-ELSEVIER SCIENCE LTD

ENVIRONMENT/ECOLOGY

2-s2.0-85147213353

Scopus

1.Guangdong Key Laboratory of Soil and Groundwater Pollution Control,School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
2.State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control,School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
3.The Key Laboratory of Water and Sediment Sciences,Ministry of Education,College of Environmental Science and Engineering,Peking University,Beijing,100871,China
4.State Key Laboratory of Heavy Oil Processing,China University of Petroleum,Beijing,102249,China
5.School of Civil and Environmental Engineering,Georgia Institute of Technology,Atlanta,30332,United States

Du，Penghui,Liu，Wen,Zhang，Qiang,et al. Transformation of dissolved organic matter during UV/peracetic acid treatment[J]. WATER RESEARCH,2023,232.

Du，Penghui.,Liu，Wen.,Zhang，Qiang.,Zhang，Peng.,He，Chen.,...&Wang，Junjian.(2023).Transformation of dissolved organic matter during UV/peracetic acid treatment.WATER RESEARCH,232.

Du，Penghui,et al."Transformation of dissolved organic matter during UV/peracetic acid treatment".WATER RESEARCH 232(2023).