双硫脲基螯合纤维对Hg2+的吸附性能研究  

Research of the Adsorption Properties of Dithiobiurea-based Chelating Fiber for Hg2+

作　　者：鲁蓉 LU Rong(Beijing Senmai Testing Technology Co.,Ltd.,Beijing 100013,China)

机构地区：[1]北京森迈检测科技有限公司

出　　处：《中国无机分析化学》2020年第1期38-44,共7页Chinese Journal of Inorganic Analytical Chemistry

摘　　要：在N,N′-羰基二咪唑(CDI)的偶联作用下,将双硫脲(DTA)修饰在聚丙烯酸接枝聚丙烯(PP-g-AA)纤维表面,得到双硫脲基螯合纤维(PP-g-AA-DTA),并探讨了该螯合纤维对Hg 2+的吸附性能。采用傅里叶红外光谱、X射线光电子能谱、扫描电子显微镜等研究了螯合纤维结构、不同吸附条件对Hg 2+吸附的影响以及选择性吸附特性。结果表明准二级动力学模型和Langmuir模型可以很好地描述吸附过程,饱和吸附容量为66.40 mg/g。该新型螯合纤维可望应用于水体中Hg 2+的去除领域。In this study,a new 2,5-Dithiobiurea(DTA)modified polypropylene fiber grafted acrylic acid(PP-g-AA-DTA)was prepared by CDI for fast and selective removal of Hg 2+from water.The PP-g-AA-DTA fibers were characterized by FT-IR,XPS and SEM,the initial concentration,temperature,pH and adsorption time on the adsorption of Hg^2+were discussed.The results showed that,the adsorption kinetics followed the pseudo-second-order model and equilibrium data were fitted well with Langmuir isotherms with the maximum adsorption capacity of 66.40 mg/g for Hg^2+.The chelating fiber held a good of selectivity for Hg^2+,and it enhanced the economics of practical applications for the removal of Hg^2+from aqueous solution.

关 键 词：螯合纤维 双硫脲 HG 吸附 机理 

分 类 号：O652.6[理学—分析化学]