期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 363, 期 1, 页码 348-354出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2011.07.032
关键词
Graphene; Fluoride; Adsorption; Kinetics; Thermodynamics
资金
- National Natural Science Foundation of China [50802045, 20975056]
- NSFC-JSPS [21111140014]
- SRF for ROCS, SEM
- Middle-aged and Youth Scientist Incentive Foundation of Shandong Province [BS09018]
- Taishan Scholar Program of Shandong Province
- Program for Changjiang Scholars and Innovative Research Team in University, China [IRT0970]
A batch adsorption system was applied to investigate the adsorption of fluoride from aqueous solution by graphene. The adsorption capacities and rates of fluoride onto graphene at different initial pH, contact time, and temperature were evaluated. The experimental results showed that graphene is an excellent fluoride adsorbent with an adsorption capacity of up to 17.65 mg/g at initial fluoride concentration of 25 mg/L and temperature of 298 K. The isotherm analysis indicated that the adsorption data can be well described by Langmuir isotherm model. Thermodynamic studies revealed that the adsorption reaction was a spontaneous and endothermic process. (C) 2011 Elsevier Inc. All rights reserved.
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