Journal
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
Volume 51, Issue 15, Pages 1667-1701Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/10643389.2020.1769427
Keywords
Cavitation; electrode; hydroxyl radicals; reactive oxygen species; sonoelectroxidation; sonolysis
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Funding
- All India Council for Technical Education (AICTE), Government of India
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This study highlights the importance of sonoelectroxidation technology in treating toxic and hazardous pollutants in aquatic bodies, as well as the potential of this method in improving wastewater treatment efficiency. By combining electrochemistry with power ultrasound, the mineralization degree of wastewater can be significantly increased, showing promising applications in wastewater treatment.
Discharge of toxic and hazardous pollutants in the aquatic bodies is dangerous for the human being and aquatic life. Nowadays, novel methods need to be developed to increase the treatment efficiency of such types of pollutants. Among the electrochemical technologies, electroxidation coupled with power ultrasound, so-called sonoelectroxidation, has gained attention because of its ability to remove a wide range of ubiquitous pollutants. The use of power ultrasound, in combination with electroxidation, provides the synergistic effect by virtue of chemical and physical effect of ultrasound for degradation of compounds. This review presents a critical analysis of studies (1996-2020) on the treatment of various synthetic and real wastewater using the sonoelectroxidation process. An overview of current advancement in electrode material and reactor geometry has been deliberated. Coupling these two techniques increased the mineralization degree in a remarkable way. This review critically evaluates various types (batch and continuous) of sonoelectro reactors used in the sonoelectrochemical process. Kinetics of the degradation process has been reviewed in detail. Challenges associated with these technologies and sluggish development in reactor geometries have been identified with the foremost application in wastewater treatment.
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