微波辅助改性腈纶纤维对水中Cu^(2+)的吸附性能  

Adsorption performance for Cu^(2+) ion in water by modified polyacrylonitrile fiber prepared with microwave irradiation

作　　者：王喜[1] 张广山[1] 邓圣[1] 郑彤[1] 王鹏[1,2] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,哈尔滨150090 [2]城市水资源与水环境国家重点实验室,哈尔滨150090

出　　处：《环境工程学报》2016年第7期3503-3509,共7页Chinese Journal of Environmental Engineering

基　　金：国家水体污染控制与治理科技重大专项(2012ZX07206-005)

摘　　要：以腈纶纤维为原料,采用微波加热冷凝回流的方法制备了一种含有大量胺基和羧甲基的功能化纤维材料,该纤维对Cu^(2+)有较高的吸附能力。利用傅里叶红外光谱(FT-IR)对改性纤维进行了表征,并讨论了吸附时间、温度、溶液浓度对纤维吸附性能的影响。结果表明,采用微波加热制备改性纤维,在保证纤维具有良好机械强度的同时,大大缩短了反应时间,并且纤维对Cu^(2+)的吸附在120 min内达到平衡,15℃时最大吸附量为103.36 mg·g^(-1),吸附过程符合Freundlich等温模型和准二级动力学方程。经5次吸附/解吸附后,吸附量无显著变化。Fibrous absorbents generously functionalized by amino and carboxylic groups were prepared using microwave irradiation and reflux condensation with polyacrylonitrile fibers. The modified fibers were characterized by Fourier transform infrared spectroscopy（ FT-IR） and exhibited a significant adsorption capacity for the Cu2＋ ion in water. The parameters that affect the adsorption performance,including time,temperature,and solution concentration,were also discussed. The results indicated that the modified fibers were produced quickly and showed improved textile strength when the microwave-assisted heating method was utilized. The adsorption equilibrium of the adsorbents was reached within 120 min,and the maximum adsorption capacity toward the Cu2＋ ion was 103. 36 mg·g-1 at 15 ℃. The adsorption processes were fitted to the Freundlich isotherm model and pseudo-second-order kinetic equation. After five cycles of adsorption-desorption processes,only a minor change was observed in the amount of Cu2＋ adsorbed.

关 键 词：聚丙烯腈纤维 胺化-羧甲基化聚丙烯腈螯合纤维(PANacF) 微波 CU2+ 

分 类 号：X703[环境科学与工程—环境工程]