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钠基膨润土插层改性的微结构与吸附机理

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闫智超, 王海玲, 孙德尚, 朱兆连. 钠基膨润土插层改性的微结构与吸附机理[J]. 环境工程学报, 2016, 10(9): 4879-4886. doi: 10.12030/j.cjee.201504207
引用本文: 闫智超, 王海玲, 孙德尚, 朱兆连. 钠基膨润土插层改性的微结构与吸附机理[J]. 环境工程学报, 2016, 10(9): 4879-4886. doi: 10.12030/j.cjee.201504207
shu
YAN Zhichao, WANG Hailing, SUN Deshang, ZHU Zhaolian. Microstructure and adsorption mechanism of intercalated modified Na-bentonite[J]. Chinese Journal of Environmental Engineering, 2016, 10(9): 4879-4886. doi: 10.12030/j.cjee.201504207
Citation: YAN Zhichao, WANG Hailing, SUN Deshang, ZHU Zhaolian. Microstructure and adsorption mechanism of intercalated modified Na-bentonite[J]. Chinese Journal of Environmental Engineering, 2016, 10(9): 4879-4886. doi: 10.12030/j.cjee.201504207
shu

钠基膨润土插层改性的微结构与吸附机理

  • 1.

    南京工业大学环境学院, 江苏省工业节水减排重点实验室, 南京 211816

  • 基金项目:

    国家自然科学基金资助项目（51308284）

  • 中图分类号: X703

Microstructure and adsorption mechanism of intercalated modified Na-bentonite

  • 1.

    Jiangsu Key Laboratory of Industrial Water-Conservation & Emission Reduction, College of Environment, Nanjing Tech University, Nanjing 211816, China

  • Fund Project:

  • 摘要: 以钠基膨润土为原料，采用十六烷基三甲基溴化铵（CTMAB）、十二烷基硫酸钠（SDS）、聚合羟基铁离子作为插层改性剂，制备出多种有机、无机、复合插层改性膨润土。运用X射线荧光光谱、扫描电镜、X射线衍射及红外光谱分析等手段研究了各插层改性膨润土的微结构变化及对苯酚和4-氯苯酚的吸附行为。结果表明：不同改性剂的插层改性效果不同，CTMAB效果最好；2种复合插层改性膨润土的层间结构有着明显的差异，CTMAB-Fe复合插层土中聚合羟基铁离子分布于有机相之外，SDS-Fe复合插层土中聚合羟基铁离子镶嵌于SDS单分子层中；各插层改性土之间吸附量的大小关系与层间距的大小关系基本一致；CTMAB插层改性膨润土对苯酚和4-氯苯酚的吸附均符合Langmuir等温方程，吸附过程均为优惠吸附。
    Abstract: A series of intercalated bentonites were prepared from using cetyltrimethylammonium bromide (CTMAB), sodium dodecyl sulfate (SDS), and Fe polycations with Na-bentonite as raw materials. X-ray fluorescence spectroscopy (XRF), scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR) were used to explore the microstructure of intercalated bentonites. The adsorption behaviors of phenol and 4-chlorophenol onto modified bentonites were also investigated. The results showed that different intercalated reagents had different effects, and that the CTMAB was superior. Fe ploycations in CTMAB-Fe intercalated bentonite were adsorbed onto the outer surface of the organic phase, whereas Fe polycations in SDS-Fe intercalated bentonite were embedded within the SDS monolayer. The adsorption capacities of intercalated bentonites corresponded to the basal spacing. The adsorption isotherm of phenol and 4-chlorophenol onto CTMAB intercalated bentonite were described by the Langmuir equation, both adsorption processes were preferential.
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  • 收稿日期:  2015-07-23
  • 刊出日期:  2016-09-10
闫智超, 王海玲, 孙德尚, 朱兆连. 钠基膨润土插层改性的微结构与吸附机理[J]. 环境工程学报, 2016, 10(9): 4879-4886. doi: 10.12030/j.cjee.201504207
引用本文: 闫智超, 王海玲, 孙德尚, 朱兆连. 钠基膨润土插层改性的微结构与吸附机理[J]. 环境工程学报, 2016, 10(9): 4879-4886. doi: 10.12030/j.cjee.201504207
shu
YAN Zhichao, WANG Hailing, SUN Deshang, ZHU Zhaolian. Microstructure and adsorption mechanism of intercalated modified Na-bentonite[J]. Chinese Journal of Environmental Engineering, 2016, 10(9): 4879-4886. doi: 10.12030/j.cjee.201504207
Citation: YAN Zhichao, WANG Hailing, SUN Deshang, ZHU Zhaolian. Microstructure and adsorption mechanism of intercalated modified Na-bentonite[J]. Chinese Journal of Environmental Engineering, 2016, 10(9): 4879-4886. doi: 10.12030/j.cjee.201504207
shu

钠基膨润土插层改性的微结构与吸附机理

  • 1. 南京工业大学环境学院, 江苏省工业节水减排重点实验室, 南京 211816
  • 收稿日期:  2015-07-23
基金项目:

国家自然科学基金资助项目（51308284）

摘要: 以钠基膨润土为原料，采用十六烷基三甲基溴化铵（CTMAB）、十二烷基硫酸钠（SDS）、聚合羟基铁离子作为插层改性剂，制备出多种有机、无机、复合插层改性膨润土。运用X射线荧光光谱、扫描电镜、X射线衍射及红外光谱分析等手段研究了各插层改性膨润土的微结构变化及对苯酚和4-氯苯酚的吸附行为。结果表明：不同改性剂的插层改性效果不同，CTMAB效果最好；2种复合插层改性膨润土的层间结构有着明显的差异，CTMAB-Fe复合插层土中聚合羟基铁离子分布于有机相之外，SDS-Fe复合插层土中聚合羟基铁离子镶嵌于SDS单分子层中；各插层改性土之间吸附量的大小关系与层间距的大小关系基本一致；CTMAB插层改性膨润土对苯酚和4-氯苯酚的吸附均符合Langmuir等温方程，吸附过程均为优惠吸附。

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