期刊
BIORESOURCE TECHNOLOGY
卷 214, 期 -, 页码 836-851出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2016.05.057
关键词
Modified biochar; Functionality; Sorption isotherms; Column operation; Regeneration
资金
- Faculty of Engineering and Information Technology, University of Technology Sydney, Australia
Modified biochar (BC) is reviewed in its preparation, functionality, applications and regeneration. The nature of precursor materials, preparatory conditions and modification methods are key factors influencing BC properties. Steam activation is unsuitable for improving BC surface functionality compared with chemical modifications. Alkali-treated BC possesses the highest surface functionality. Both alkali modified BC and nanomaterial impregnated BC composites are highly favorable for enhancing the adsorption of different contaminants from wastewater. Acidic treatment provides more oxygenated functional groups on BC surfaces. The Langmuir isotherm model provides the best fit for sorption equilibria of heavy metals and anionic contaminants, while the Freundlich isotherm model is the best fit for emerging contaminants. The pseudo 2(nd) order is the most appropriate model of sorption kinetics for all contaminants. Future research should focus on industry-scale applications and hybrid systems for contaminant removal due to scarcity of data. (C) 2016 Elsevier Ltd. All rights reserved.
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