Abstract
Ionic liquids (ILs) are the class of materials which are purely ionic in nature and liquid at room temperature. Their remarkable properties like very low vapour pressure, non-inflammable and high heat resistance are responsible for their use as a very appealing solvent in a variety of industrial applications in place of regular organic solvents. Because ILs are water soluble to a certain extent, the industrial wastewater effluents are found to contaminate with their traces. The non-biodegradability of ILs attracts the attention of the researchers for their removal or degradation from wastewater. Numbers of methods are available for the treatment of wastewater. However, it is very crucial to use the most efficient method for the degradation of ILs. Advanced oxidation process (AOP) is one of the most important techniques for the treatment of ILs in wastewater which have been investigated during last decades. This review paper covers the cost-effective Fenton, photochemical and photocatalytic AOPs and their combination that could be applied for the degradation of ILs from the wastewater. Theoretical explanations of these AOPs along with experimental conditions and kinetics of degradation or removal of ILs from water and wastewater have been reported and compared. Finally, future perspectives of IL degradation are presented.
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References
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The authors thank for the support and facilities provided by the Director, Laxminarayan Institute of Technology, RTM Nagpur University, Nagpur, MS, India, and the Principal, Government Science College, Gadchiroli, MS, India.
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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by Mr. S. D. A. and Dr. P. S. A. The first draft of the manuscript was written by Mr. S. D. A. All authors commented on previous versions of the manuscript and read and approved the final manuscript.
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Ashtaputrey, S.D., Agrawal, P.S. Fenton and photo-assisted advanced oxidative degradation of ionic liquids: a review. Environ Sci Pollut Res 30, 103576–103601 (2023). https://doi.org/10.1007/s11356-023-29777-y
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DOI: https://doi.org/10.1007/s11356-023-29777-y