N-苯基硫脲改性螯合纤维对水溶液中Hg(Ⅱ)的吸附性能  

Research of the adsorption properties for Hg(Ⅱ)from aqueous solution using N-phenylthiourea functionalized chelating fiber

作　　者：王会才[1,2] 姚晓霞[1] 马振华[1] 刘明强[1] 贾岱[1] 

机构地区：[1]天津工业大学环境与化学工程学院,天津300387 [2]天津工业大学省部共建分离膜与膜过程国家重点实验室,天津300387

出　　处：《功能材料》2016年第7期7092-7097,共6页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(309003250);天津市与科技部中小企业创新基金资助项目(13ZXCXSY14200,13C26211200305,14ZXCXGX00724);天津市科技特派员资助项目(14JCTPJC00500)

摘　　要：以接枝丙烯酸的聚丙烯纤维（PP-g-AA）为基体材料,在1-乙基-3-（3-二甲氨丙基）碳二亚胺盐酸盐（EDC.HCl）和N-羟基琥珀酰亚胺（NHS）的作用下,将N-苯基硫脲（PTU）修饰在PP-g-AA纤维上,得到新型功能化螯合纤维PP-g-AA-PTU,并研究了其对水溶液中Hg（Ⅱ）的吸附行为。采用FT-IR、XPS等测试手段对螯合纤维进行表征,研究了溶液浓度、温度、pH值、吸附时间对Hg（Ⅱ）吸附性能的影响,并考察了纤维的选择性吸附。研究结果表明,PP-g-AA-PTU纤维在溶液pH值为3～8范围内,对Hg（Ⅱ）的吸附性能无明显变化,在10min内即可达到吸附平衡,吸附效果明显优于PP-g-AA纤维。吸附动力学符合准二级动力学模型,吸附等温线符合Langmuir模型,且饱和吸附量高达76.51mg/g。该螯合纤维能对Hg（Ⅱ）具有优异的吸附选择性,在水体中Hg（Ⅱ）的去除领域具有良好的应用前景。In this study,a new N-phenylthiourea（PTU）modified polypropylene fiber grafted acrylic acid（PP-gAA-PTU）was prepared by EDC/NHS for fast and selective removal of Hg（Ⅱ）from water.The PP-g-AAPTU fibers were characterized by FT-IR and SEM,discussing the initial concentration,temperature,pH and adsorption time on the adsorption of Hg（Ⅱ）.The results showed that,in comparison with PP-g-AA fibers,the adsorptive equilibrium of PP-g-AA-PTU fibers could be reached within 10 min,and pH has no influence on adsorption process of Hg（Ⅱ）over the range of 3-8.The adsorption kinetics followed the pseudo-second-order model and equilibrium data were fitted well with Langmuir isotherms with the maximum adsorption capacity of76.51mg/g for Hg（Ⅱ）.The chelating fiber held a good of selectivity for Hg（Ⅱ）,and it enhanced the economics of practical applications for the removal of Hg（Ⅱ）from aqueous solution.

关 键 词：螯合纤维 N-苯基硫脲 Hg(Ⅱ) 吸附 水溶液 

分 类 号：TQ342.86[化学工程—化纤工业]