Can biochar and hydrochar be used as sustainable catalyst for persulfate activation?

Gasim, M.F. and Lim, J.-W. and Low, S.-C. and Lin, K.-Y.A. and Oh, W.-D. (2022) Can biochar and hydrochar be used as sustainable catalyst for persulfate activation? Chemosphere, 287.

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Abstract

Over the past decade, there has been a surge of interest in using char (hydrochar or biochar) derived from biomass as persulfate (PS, either peroxymonosulfate or peroxydisulfate) activator for anthropogenic pollutants removal. While extensive investigation showed that char could be used as a PS activator, its sustainability over prolonged application is equivocal. This review provides an assessment of the knowledge gap related to the sustainability of char as a PS activator. The desirable char properties for PS activation are identified, include the high specific surface area and favorable surface chemistry. Various synthesis strategies to obtain the desirable properties during biomass pre-treatment, hydrochar and biochar synthesis, and char post-treatment are discussed. Thereafter, factors related to the sustainability of employing char as a PS activator for anthropogenic pollutants removal are critically evaluated. Among the critical factors include performance uncertainty, competing adsorption process, char stability during PS activation, biomass precursor variation, scalability, and toxic components in char. Finally, some potential research directions are provided. Fulfilling the sustainability factors will provide opportunity to employ char as an economical and efficient catalyst for sustainable environmental remediation. © 2021 Elsevier Ltd

Item Type: Article
Impact Factor: cited By 11
Uncontrolled Keywords: Catalysts; Chemical activation; Pollution; Surface chemistry; Sustainable development, Anthropogenic pollutants; Biochar; Hydrochar; Peroxydisulfate; Peroxymonosulfate; Persulfate activations; Persulphate; Pollutants removal; Property; ]+ catalyst, Biomass, biochar; charcoal, adsorption; biomass; catalysis, Adsorption; Biomass; Catalysis; Charcoal
Depositing User: Mr Ahmad Suhairi Mohamed Lazim
Date Deposited: 07 Sep 2022 08:27
Last Modified: 07 Sep 2022 08:27
URI: http://scholars.utp.edu.my/id/eprint/33614

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