Journal
BIORESOURCE TECHNOLOGY
Volume 144, Issue -, Pages 401-409Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2013.07.002
Keywords
Activated carbons; Solution-processed carbonization; Adsorption; Dye molecules
Funding
- National Natural Science Foundation of China [21243013]
- Natural Science Foundation of Liaoning Province [201202014]
- Opening Foundation of State Key Laboratory of Inorganic Synthesis and Preparative Chemistry of Jilin University [2013-07]
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A coupling of low-temperature sulfuric acid-assisted carbonization and H3PO4 activation was employed to convert NaOH-pretreated rice husks into activated carbons with extremely high surface area (2028 m(2) g(-1)) and integrated characteristics. The influences of the activation temperature and impregnation ratio on the surface area, pore volume of activated carbons were thoroughly investigated. The morphology and surface chemistry of activated carbons were characterized using N-2 sorption, FTIR, XPS, SEM, TEM, etc. The adsorption capacity of resulting carbons obtained under optimum preparation conditions was systematically evaluated using methylene blue under various simulated conditions. The adsorption process can be well described by both Langmuir isotherm model and the pseudo-second order kinetics models; and the maximum monolayer capacity of methylene blue was ca. 578 mg g(-1). (C) 2013 Elsevier Ltd. All rights reserved.
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