An overview about the extraction of heavy metals and other critical pollutants from contaminated water via hydrophobic deep eutectic solvents

Wazeer, Irfan and Hizaddin, Hanee Farzana and Hashim, Mohd A. and Hadj-Kali, Mohamed K. (2022) An overview about the extraction of heavy metals and other critical pollutants from contaminated water via hydrophobic deep eutectic solvents. Journal of Environmental Chemical Engineering, 10 (6). ISSN 2213-2929, DOI https://doi.org/10.1016/j.jece.2022.108574.

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Abstract

Water pollution is a critical and problematic issue that threatens the sustainability of human civilization. Wastewater streams include a variety of major contaminants that must be eliminated prior to being discharged into the environment. A class of neoteric solvents called hydrophobic deep eutectic solvents (HDESs) has recently attracted much interest in the academic and industrial communities. Because of their remarkable characteristics, which include their low vapor pressure, a broad liquid range, minimal water miscibility, low flammability, and high solvation ability; HDESs are prospective substitutes for organic solvents currently used in industry. In this review, recent results on the removal of toxic/heavy metals, phenolic pollutants and polycyclic aromatic hy-drocarbons from an aqueous environment using HDESs are presented. The effects of various parameters on extraction performance, such as the nature of hydrogen bond donor or acceptor, the molar ratio of HDES con-stituents, the mass ratio of HDES to water, and the initial concentration of contaminants are discussed. Various obstacles and possible improvements in the treatment processes are also addressed. These findings can serve as a basis for future research to develop effective HDES-based processes to treat contaminated water and thereby address a growing global environmental challenge.

Item Type: Article
Funders: King Saud University (Grant No: RSP-2021/361)
Uncontrolled Keywords: Wastewater; Hydrophobic deep eutectic solvents; Heavy metals; Phenols; Green chemistry; Liquid -liquid extraction
Subjects: T Technology > TP Chemical technology
Divisions: Faculty of Engineering > Department of Chemical Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 14 Nov 2023 04:55
Last Modified: 14 Nov 2023 04:55
URI: http://eprints.um.edu.my/id/eprint/40714

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