期刊
BIORESOURCE TECHNOLOGY
卷 206, 期 -, 页码 16-22出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2015.12.087
关键词
Biochar; Adsorption; Magnetic field; Methylene blue
资金
- National Science Foundation of China [51378205]
- Innovation Experimental Programmes for college students of North China University of Water Resources and Electrical Power [201534]
Biochar pyrolyzed from wheat straw was innovatively used for the adsorptive removal of cationic dye methylene blue through exposure to a magnetic field. The adsorption capability of the biochar pyrolyzed at 200 degrees C exceeded that of samples pyrolyzed at higher temperatures. The surface acidic functional groups of wheat straw biochar were deduced to be more sensitive to the effects of the external magnetic field. The enhancement of the magnetic field achieved by increases in the initial dye concentration, and a decrease in the biochar dosage and solution pH, were more significant compared with those caused by other conditions. Kinetic experiments indicated that chemisorption occurred during adsorption. The q(max) values for dye adsorption without, and with, an external magnetic field were found to be 46.6 and 62.5 mg/g, respectively. These demonstrated that wheat straw biochar could be used for the efficient adsorption of pollutants when assisted by an external magnetic field. (C) 2016 Elsevier Ltd. All rights reserved.
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