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›› 2011, Vol. 11 ›› Issue (4): 554-560.

• 反应与分离 • Previous Articles     Next Articles

Adsorption of Cr(VI) in Waste Water by Functional Superparamagnetic PGMA Polymer Microspheres with Amino Groups

LI Peng-fei YANG Liang-rong LI Wen-song HUANG Yin-bin WANG Juan KONG Peng XU Lin LIU Hui-zhou   

  1. Laboratory of Green Process and Engineering, Institute of Process Engineering, CAS Young Scientist Laboratory of Separation Science and Engineering, State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences Young Scientist Laboratory of Separation Science and Engineering, State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences Young Scientist Laboratory of Separation Science and Engineering, State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences Young Scientist Laboratory of Separation Science and Engineering, State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences Young Scientist Laboratory of Separation Science and Engineering, State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences Institute of Process Engineering, Chinese Academy of Sciences
  • Received:2011-04-15 Revised:2011-06-02 Online:2011-08-20 Published:2011-08-20
  • Contact: LI Peng-fei

氨基功能化超顺磁性PGMA高分子微球去除废水中的铬(VI)

李鹏飞 杨良嵘 李文松 黄寅斌 王娟 孔鹏 徐林 刘会洲   

  1. 中国科学院过程工程研究所绿色过程与工程实验室 中科院过程工程研究所分离科学与工程青年实验室、生化工程国家重点实验室、中科院研究生院 中科院过程工程研究所分离科学与工程青年实验室、生化工程国家重点实验室、中科院研究生院 中科院过程工程研究所分离科学与工程青年实验室、生化工程国家重点实验室、中科院研究生院 中科院过程工程研究所分离科学与工程青年实验室、生化工程国家重点实验室、中科院研究生院 中科院过程工程研究所分离科学与工程青年实验室、生化工程国家重点实验室、中科院研究生院 中国科学院过程工程研究所分离工程与工程青年实验室
  • 通讯作者: 李鹏飞

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Abstract: Micron-sized monodisperse superparamagnetic polyglycidyl methacrylate (PGMA) particles with functional amino groups were prepared and characterized by SEM, FT-IR and XRD, respectively. The effect of pH value on the adsorption was studied. Their adsorption properties and mechanism for Cr(VI) from wastewater were investigated. In a model system, the adsorption process followed the Langmuir adsorption isotherm, and the maximum sorption capacity of was calculated to be 263.16 mg/g at 308 K and pH 4.5. The adsorption of Cr(VI) capacity reached equilibrium within 15 min and followed pseudo second order kinetics. The adsorption was a spontaneous and endothermic process with DH0=9.63 kJ/mol.

Key words: PGMA, amino group, monodispersion, superparamagnetism, Cr(VI), adsorption

摘要： 通过渗透沉积过程合成单分散的磁性聚甲基丙烯酸缩水甘油酯(PGMA-NH2)高分子微球，对其进行了SEM, FT-IR, XRD表征. 并着重研究了磁性PGMA-NH2高分子微球对Cr(VI)的吸附性能及吸附机理. 结果表明，此磁性高分子微球对Cr(VI)有较高的吸附量，等温吸附数据符合Langmuir模型，在温度298.15 K, pH=4.5时，吸附剂的饱和吸附容量为263.16 mg/g. 吸附量与废水中Cr(VI)的离子形式有关，pH=1.5时吸附效果最好，在15 min内达到平衡. 吸附以离子交换与静电引力为主，自发进行，焓变DH0=9.63 kJ/mol.

关键词: PGMA, 氨基, 单分散, 超顺磁性, Cr(VI), 吸附

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