多功能球形螯合吸附剂的微波辐射制备研究  

Preparation of a spherical chelation adsorbent under microwave assistant conditions

作　　者：林兆慧[1,2] 李楠[1] 卞琼[1,2] 刘明华[1,2] 

机构地区：[1]福州大学环境与资源学院,福建福州350108 [2]福建省生物质资源化技术开发基地,福建福州350108

出　　处：《功能材料》2013年第21期3199-3203,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(21077024);福州大学科技发展基金资助项目(2012-XY-10)

摘　　要：以腈纶废丝为原料,二甲基甲酰胺和分散剂溶液分别为溶剂和非溶剂,通过相转换法制得聚丙烯腈珠体,再采用微波辐射法对珠体进行改性,制得一种多功能球形螯合吸附剂SPDA,并对SPDA进行理化性能表征。研究表明,SPDA含有酰胺基和咪唑基等多种特征官能团,改性的最佳条件为单体和珠体质量比为7∶1,催化剂质量占珠体质量14.0%,乙二醇和珠体质量比为7∶5,微波功率为640W,辐射反应5min。采用静态吸附法研究SPDA对Cr(Ⅵ)的吸附效果,当pH值为4,Cr(Ⅵ)的初始质量浓度为120mg/L,吸附时间为2h,吸附温度为30℃时,去除率达到96.2%,平衡吸附容量可达38.5mg/g。The spherical polyacrylonitrile beads were prepared via phase inversion method usting DMF as solvent and dispersant solution as non-solvent and waste polyacrylonitrile fibre as raw material. Then the spherical PAN beads were used to prepare a multifunctional spherical chelation adsorbent, denoted as SPDA, under mi- crowave assistant conditions. Besides, the physical and chemical properties were also studied. The results indi- cated SPDA contained amide and imidazolyl groups. And the optimum modified conditions included 7 ： 1 of the mass ratio of monomer and beads, 14 ： 100 of the mass ratio of catalyst and beads, 7 ： 5 of the mass ratio of EG and beads, 640W of the microwave power and 5mins of the radiation time. Additi6nally, study was also conduc- ted regarding the adsorption of Cr（VI） on SPDA by static adsorption experiments. The removal percentage and equilibrium adsorption capacity of SPDA could reach 96.2% and 38.5mg/g under such conditions as 4 of the so- lution pH, 120mg/L of Cr（VI） concentration, 2h of the adsorption time and 30~C of the adsorption tempera- ture.

关 键 词：腈纶废丝 球形螯合吸附剂 微波辐射 改性 咪唑基团 

分 类 号：O621.3[理学—有机化学] X791[理学—化学]