Removal U(VI) from artificial seawater using facilely and covalently grafted polyacrylonitrile fibers with lysine

被引：65
作者：
Li, Wenting [1 ]
Liu, Qi [1 ]
Liu, Jingyuan [1 ]
Zhang, Hongsen [1 ]
Li, Rumin [1 ]
Li, Zhanshuang [1 ]
Jing, Xiaoyan [1 ]
Wang, Jun [1 ,2 ]
机构：
[1] Harbin Engn Univ, Key Lab Superlight Mat & Surface Technol, Minist Educ, Harbin 150001, Peoples R China
[2] Harbin Engn Univ, Inst Adv Marine Mat, Harbin 150001, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2017年 / 403卷
基金：
中国国家自然科学基金; 对外科技合作项目（国际科技项目）;
关键词：
Covalent modification; U(VI); Adsorption; Isotherms; Kinetics; AQUEOUS-SOLUTIONS; MICROWAVE IRRADIATION; URANIUM EXTRACTION; ORGANIC FRAMEWORK; IONS; ADSORPTION; RECOVERY; SORPTION; ACID; SURFACES;
D O I：
10.1016/j.apsusc.2017.01.104
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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.
引用
收藏
页码：378 / 388
页数：11
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