高等学校化学学报

高等学校化学学报 ›› 2011, Vol. 32 ›› Issue (8): 1825.

• 研究论文 • 上一篇    下一篇

双阳离子复合改性膨润土的吸附性能与构效关系

孙洪良1,朱利中2,朱建喜3   

  1. 1. 浙江工商大学化学实验中心, 杭州 310012;
    2. 浙江大学环境科学系, 杭州 310028;
    3. 中国科学院广州地球化学研究所, 广州 510640
  • 收稿日期:2010-11-15 修回日期:2011-05-24 出版日期:2011-08-10 发布日期:2011-07-19
  • 通讯作者: 孙洪良 E-mail:sunhongliang@mail.zjgsu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号: 50378081)和浙江省自然科学基金(批准号: Y504041)资助.

Correlation of Structure and Sorption Behavior of Modified Bentonite

SUN Hong-Liang1*, ZHU Li-Zhong2, ZHU Jian-Xi3   

  1. 1. Center of Chemistry Laboratory, Zhejiang Gongshang University, Hangzhou 310012, China;
    2. Department of Environmental Science, Zhejiang University, Hangzhou 310028, China;
    3. Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
  • Received:2010-11-15 Revised:2011-05-24 Online:2011-08-10 Published:2011-07-19
  • Contact: SUN Hong-Liang E-mail:sunhongliang@mail.zjgsu.edu.cn
  • Supported by:

    国家自然科学基金(批准号: 50378081)和浙江省自然科学基金(批准号: Y504041)资助.

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被引次数

29

摘要： 膨润土是一种以蒙脱石为主要成分的天然吸附材料. 本文用2-巯基乙胺盐酸盐(MEA)与十六烷基三甲基溴化铵(HDTMA)复合改性内蒙钙基膨润土(IMB), 制得具有特殊结构与性能的吸附材料MEA-HDTMA-IMB. X射线衍射(XRD)、红外光谱(FT-IR)、热分析(TG-DTA)及比表面积(N2-BET)等结构表征表明: 复合改性膨润土的比表面积和层间距显著增大. 吸附研究发现: MEA-HDTMA-IMB能同时有效吸附混合水溶液中的有机物对硝基苯酚和重金属铜. 复合改性膨润土对水中有机物的吸附机理以分配作用为主, 其吸附能力强于用季铵盐阳离子单一改性的有机膨润土HDTMA-IMB; 对水中重金属的吸附主要为络合反应, 其吸附性能与用巯基铵阳离子单一改性的膨润土MEA-IMB相当.

关键词: 膨润土, 改性, 吸附, 水处理, 有机污染物, 重金属

Abstract: Bentonite, composed primarily of montmorillonite, is a natural adsorbent material. A novel sorbent with specific structure and property, identified by MEA-HDTMA-IMB, was prepared by modifying Ca-bentonite (IMB) obtained from Inner Mongolia of China with both 2-mercaptoethylamine hydrochloride (MEA) and hexadecyltrimethylammonium bromide (HDTMA). The sample was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), thermal analysis (TG-DTA), and specific surface area (N2-BET). The results indicated that both specific surface area and basal spacing of MEA-HDTMA-IMB were increased significantly. The performance of this sorbent showed that MEA-HDTMA-IMB could sorb p-nitrophenol and copper simultaneously from the mixed solution. The sorption of organic pollutant onto MEA-HDTMA-IMB was better than HDTMA-IMB and controlled by a partition process. The sorption of heavy metal onto MEA-HDTMA-IMB was dominated by the formation of complexes and in close proximity to MEA-IMB.

Key words: Bentonite, Modification, Sorption, Water treatment, Organic pollutant, Heavy metal

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