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Cu修饰成型13X分子筛对水中四环素的吸附行为

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范素兵, 吕俊敏, 马玉龙, 杨小风. Cu修饰成型13X分子筛对水中四环素的吸附行为[J]. 环境化学, 2018, 37(12): 2721-2729. doi: 10.7524/j.issn.0254-6108.2018082302
引用本文: 范素兵, 吕俊敏, 马玉龙, 杨小风. Cu修饰成型13X分子筛对水中四环素的吸附行为[J]. 环境化学, 2018, 37(12): 2721-2729. doi: 10.7524/j.issn.0254-6108.2018082302
shu
FAN Subing, LV Junmin, MA Yulong, YANG Xiaofeng. Adsorption behavior of modified shaped 13X zeolite for removing tetracycline in aqueous solution[J]. Environmental Chemistry, 2018, 37(12): 2721-2729. doi: 10.7524/j.issn.0254-6108.2018082302
Citation: FAN Subing, LV Junmin, MA Yulong, YANG Xiaofeng. Adsorption behavior of modified shaped 13X zeolite for removing tetracycline in aqueous solution[J]. Environmental Chemistry, 2018, 37(12): 2721-2729. doi: 10.7524/j.issn.0254-6108.2018082302
shu

Cu修饰成型13X分子筛对水中四环素的吸附行为

  • 1.

    宁夏大学省部共建煤炭高效利用与绿色化工国家重点实验室, 宁夏大学化学化工学院, 银川, 750021

  • 基金项目:

    国家自然科学基金（21467023）和宁夏高校科学研究项目（NGY2016005，NGY2017001）资助.

Adsorption behavior of modified shaped 13X zeolite for removing tetracycline in aqueous solution

  • 1.

    State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering;College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan, 750021, China

  • Fund Project: Supported by the National Natural Science Foundation of China (21467023)and the Scientific Research Foundation of the Higher Education Institutions of Ningxia(NGY2016005, NGY2017001).

  • 摘要: 针对水中四环素有机污染物去除，选择Cu（Ⅱ）表面修饰的成型分子筛Cu-13X（s）为吸附剂，系统研究了吸附行为，考察了吸附剂的再生使用性能.结果表明：Cu-13X（s）分子筛晶型、形貌及硅铝比与交换前基本一致.吸附动力学研究表明该过程符合准二级动力学模型；对于高浓度四环素水溶液，颗粒内扩散为吸附的速控步，但不是唯一的速控步.四环素在Cu-13X（s）分子筛上的吸附均符合Langmuir单分子层吸附模型，是自发且混乱度降低的放热过程.Cu-13X（s）再生4次后，去除率稳定，具有良好的再生使用性能.
    Abstract: To remove of organic pollutant tetracycline (TC) in water, Cu(Ⅱ) modified shaped zeolite (Cu-13X(s)) as an adsorbent was prepared and investigated to understand its adsorption behaviour for TC and regenerability. Results showed that the crystal topology, morphology and Si/Al ratio of Cu-13X(s) almost remained unchanged in comparison to 13X. The adsorption kinetics fitted pseudo-second-order model. For high concentrations of tetracycline, intra-particle diffusion was the rate-determining step, but not the only one. The adsorption isotherms were described well by the Langmuir model, and the process was exothermic and entropically unfavorable. After repeated adsorption-regeneration for 4 times, Cu-13X(s) still possessed constant removal efficiency, indicating excellent regenerability.
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  • 收稿日期:  2018-08-23
  • 刊出日期:  2018-12-15
范素兵, 吕俊敏, 马玉龙, 杨小风. Cu修饰成型13X分子筛对水中四环素的吸附行为[J]. 环境化学, 2018, 37(12): 2721-2729. doi: 10.7524/j.issn.0254-6108.2018082302
引用本文: 范素兵, 吕俊敏, 马玉龙, 杨小风. Cu修饰成型13X分子筛对水中四环素的吸附行为[J]. 环境化学, 2018, 37(12): 2721-2729. doi: 10.7524/j.issn.0254-6108.2018082302
shu
FAN Subing, LV Junmin, MA Yulong, YANG Xiaofeng. Adsorption behavior of modified shaped 13X zeolite for removing tetracycline in aqueous solution[J]. Environmental Chemistry, 2018, 37(12): 2721-2729. doi: 10.7524/j.issn.0254-6108.2018082302
Citation: FAN Subing, LV Junmin, MA Yulong, YANG Xiaofeng. Adsorption behavior of modified shaped 13X zeolite for removing tetracycline in aqueous solution[J]. Environmental Chemistry, 2018, 37(12): 2721-2729. doi: 10.7524/j.issn.0254-6108.2018082302
shu

Cu修饰成型13X分子筛对水中四环素的吸附行为

  • 1. 宁夏大学省部共建煤炭高效利用与绿色化工国家重点实验室, 宁夏大学化学化工学院, 银川, 750021
  • 收稿日期:  2018-08-23
基金项目:

国家自然科学基金（21467023）和宁夏高校科学研究项目（NGY2016005，NGY2017001）资助.

摘要: 针对水中四环素有机污染物去除，选择Cu（Ⅱ）表面修饰的成型分子筛Cu-13X（s）为吸附剂，系统研究了吸附行为，考察了吸附剂的再生使用性能.结果表明：Cu-13X（s）分子筛晶型、形貌及硅铝比与交换前基本一致.吸附动力学研究表明该过程符合准二级动力学模型；对于高浓度四环素水溶液，颗粒内扩散为吸附的速控步，但不是唯一的速控步.四环素在Cu-13X（s）分子筛上的吸附均符合Langmuir单分子层吸附模型，是自发且混乱度降低的放热过程.Cu-13X（s）再生4次后，去除率稳定，具有良好的再生使用性能.

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