A Review on Additives-assisted Ultrasound for Organic Pollutants Degradation

Xiaohui Lu; Wei Qiu; Jiali Peng; Haodan Xu; Da Wang; Ye Cao; Wei Zhang; Jun Ma

doi:10.1016/j.jhazmat.2020.123915

A Review on Additives-assisted Ultrasound for Organic Pollutants Degradation

J Hazard Mater. 2021 Feb 5:403:123915. doi: 10.1016/j.jhazmat.2020.123915. Epub 2020 Sep 12.

Authors

Xiaohui Lu¹, Wei Qiu², Jiali Peng³, Haodan Xu¹, Da Wang⁴, Ye Cao⁵, Wei Zhang⁶, Jun Ma⁷

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: qiuweihit@126.com.
³ Department of Environmental Science and Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, China.
⁴ College of Environment, Zhejiang University of Technology, Hangzhou 310032, China.
⁵ Department of Chemistry and Biochemistry, Queen Mary University of London, London E1 4NS, UK.
⁶ School of Environmental and Material Engineering, Yantai University, Yantai 264005, China.
⁷ State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China. Electronic address: majun@hit.edu.cn.

PMID: 33264967
DOI: 10.1016/j.jhazmat.2020.123915

Abstract

In the past 2 decades, considerable attentions have been paid to the sonochemical advanced oxidation processes (SAOPs) in the fields of pollutants removal. SAOPs are powerful methods for refractory pollutants degradation due to the free radicals (e.g., •OH and •H) generated by water pyrolysis and extremely high temperature and pressure in and around cavitation bubbles. Reports on various additives for the improvement of sonochemical pollutants degradation including oxidants, inorganic anions, etc. have been made. This paper presents a comprehensive review on the ultrasound (US) alone and sono-hybrid systems for various pollutants degradation. In this paper, the degradation efficiency of various pollutants in sono-hybrid systems are elucidated in detail, and particular emphasis is placed on the reaction mechanism of additives in US for the enhancement of pollutants degradation. The problems on the applications of the current sono-hybrid systems are identified and discussed, and the outlooks for further in-depth studies on the challenges and some research needs for the applications of SAOPs for the removal of organic pollutants from aquatic systems are made at the end.

Keywords: Additives; Organic pollutants; Reaction mechanism; Sonochemical AOPs; Ultrasound.

Publication types

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