期刊
APPLIED SURFACE SCIENCE
卷 403, 期 -, 页码 378-388出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2017.01.104
关键词
Covalent modification; U(VI); Adsorption; Isotherms; Kinetics
类别
资金
- National Natural Science Foundation of China [NSFC 51402065]
- Heilongjiang Province Natural Science Funds for Distinguished Young Scholar [JC201404]
- Fundamental Research Funds of the Central University (HEUCFZ)
- International Science & Technology Cooperation Program of China [2015DFR50050]
- Major Project of Science and Technology of Heilongjiang Province [GA14A101]
Polyacrylonitrile fibers (PANF) covalently modified with lysine (PAN-Lys) was facilely synthesized and carefully characterized. The critical factors affecting U(VI) adsorption from aqueous solution were exploited, such as initial pH, contact time, concentration and temperature. The adsorption process is strongly dependent on solution pH. With excellent adsorption capacity and high affinity toward U(VI), the process for U(VI) is extremely rapid and the equilibrium can be reached within 20 min. The thermodynamics and kinetics were strictly evaluated. In addition, the hypothetical adsorption mechanisms were proposed. Moreover, the adsorption behavior at low concentrations (3-30 mu g L-1) in simulated seawater was also investigated. Therefore, PAN-Lys can be potentially utilized for the efficient removal of U(VI) from seawater. (C) 2017 Elsevier B.V. All rights reserved.
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