张慧娟, 刘王玮, 吕浩永, 刘惠玲.磁性聚苯乙烯-苯甲氨二乙酸对Cu2+富集性能的研究[J].中南民族大学学报自然科学版,2018,(1):25-29
磁性聚苯乙烯-苯甲氨二乙酸对Cu2+富集性能的研究
Enrichment of Cu2+ by Magnetic Polystyrene-Benzyl Iminodiacetic Acid Composites
  
DOI:
中文关键词: 聚苯乙烯­苯甲氨二乙酸  磁性材料  铜离子  吸附
英文关键词: polystyrene-benzyl iminodiacetic acid  magnetic material  copper ions  absorption
基金项目:国家自然科学基金资助项目(21571192);中南民族大学开放实验室技改资助项目(CX201601)
作者单位
张慧娟1, 刘王玮1, 吕浩永1, 刘惠玲1,2 1 中南民族大学 化学与材料科学学院武汉4300742 中南民族大学 实验教学与实验室管理中心武汉 430074 
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中文摘要:
      为制备新型材料用于快速分离富集水中的微量铜元素,以磁性硅胶微球为核,N-(4-乙烯基)-苯甲氨二乙酸为单体,二乙烯基苯为交联剂,采用热引发聚合制备了磁性聚苯乙烯-苯甲氨二乙酸复合材料.通过傅里叶红外光谱、透射电镜和热重分析对复合材料的组成和结构特性进行了表征,并用Cu2+研究了其富集性能和相关吸附动力学.结果表明:具有官能团的聚合物成功地包覆在了Fe3O4纳米粒子表面.10mg吸附剂在pH值为5的10mL Cu2+溶液(25 mg·L-1)中,15 min达到吸附平衡且吸附率可达93%. Cu2+在EDTA溶液(0.1 mol·L-1)中15 min可快速洗脱,洗脱率达95%.Cu2+在材料上的吸附行为与准二级动力学模型拟合较好.
英文摘要:
      In order to prepare new materials for the rapid separation and enrichment of trace Cu2+ in water, magnetic polystyrene-benzyl iminodiacetic acid composites was prepared by thermal polymerization using magnetic silica microsphere as the core, N-(4-vinyl)-benzyl iminodiacetic acid as monomer, and divinyl benzene as cross-linker respectively. The composition and structure of the resulting materials were characterized by Fourier infrared spectroscopy, transmission electron microscopy and thermogravimetric analysis. Cu2+ was used to study the enrichment performance and related adsorption kinetics. The result showed that the polymer with functional groups was successfully coated on the surface of Fe3O4 nanoparticles. Adsorption equilibrium was achieved within 15 min with an adsorption rate of 93% by using 10 mg adsorbent in 10 mL Cu2+ solution (25 mg·L-1) at a pH value of 5.0. Cu2+ could be quickly eluted using EDTA solution (0.1 mol·L-1) within 15 min, with elution rate of up to 95%. The adsorption behavior of Cu2+ on the prepared material fitted well with the pseudo two-order kinetics model.
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