Journal
ECOLOGICAL ENGINEERING
Volume 87, Issue -, Pages 240-245Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ecoleng.2015.11.045
Keywords
Adsorption; Cadmium; Peanut husk biochar; Isothermal model; Aqueous media
Funding
- National Natural Science Foundation of China [41571288]
- Chinese Academy of Sciences Key Development Project [KZZD-EW-16-02]
- National Science and Technology Support Program of China [2014BAD14B04]
- National High-Tech R&D Program of China [2012AA06A204]
- Fujian Provincial Department of Science and Technology Project [2015Y0084]
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This study was conducted to investigate the best absorbent for cadmium (Cd) present in aqueous solutions. Among the selected absorbents (n = 22), peanut husk biochar (PHB) was the best absorbent for Cd and its adsorption reached to equilibrium within 12 h. In this study, the optimum conditions observed for Cd adsorption were pH 5.0, an initial Cd concentration of 200 mg L-1, a PHB dosage of 40 g L-1, and room temperature. The Cd removal efficiency of the tested biochar reached to 99.9% at these optimum conditions. EDX analysis confirmed that Cd was adsorbed onto PHB more than onto PHs. It is concluded that PHB can be used as a good remediating material for removal of Cd from contaminated environmental matrixes. (C) 2015 Elsevier B.V. All rights reserved.
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