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臭氧加速人造沸石的合成及其对氨氮吸附特性影响

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陈婧, 汪晓军, 陈静, 覃梦竹, 周松伟. 臭氧加速人造沸石的合成及其对氨氮吸附特性影响[J]. 环境化学, 2019, 38(4): 903-910. doi: 10.7524/j.issn.0254-6108.2018061101
引用本文: 陈婧, 汪晓军, 陈静, 覃梦竹, 周松伟. 臭氧加速人造沸石的合成及其对氨氮吸附特性影响[J]. 环境化学, 2019, 38(4): 903-910. doi: 10.7524/j.issn.0254-6108.2018061101
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CHEN Jing, WANG Xiaojun, CHEN Jing, QIN Mengzhu, ZHOU Songwei. Accelerated synthesis of artificial zeolite by ozone and its effect on adsorption characteristics of ammonium[J]. Environmental Chemistry, 2019, 38(4): 903-910. doi: 10.7524/j.issn.0254-6108.2018061101
Citation: CHEN Jing, WANG Xiaojun, CHEN Jing, QIN Mengzhu, ZHOU Songwei. Accelerated synthesis of artificial zeolite by ozone and its effect on adsorption characteristics of ammonium[J]. Environmental Chemistry, 2019, 38(4): 903-910. doi: 10.7524/j.issn.0254-6108.2018061101
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臭氧加速人造沸石的合成及其对氨氮吸附特性影响

  • 1.

    环境与能源学院, 华南理工大学, 广州, 510006;

  • 2.

    污染控制与生态修复重点实验室, 华南理工大学, 广州, 510006;

  • 3.

    资源环境与材料学院, 广西大学, 南宁, 530000

  • 基金项目:

    广东省应用型科技研发专项（2015B020235013）和广东省应用型科技研发及重大科技成果转化专项（2017B020236004）资助.

Accelerated synthesis of artificial zeolite by ozone and its effect on adsorption characteristics of ammonium

  • 1.

    School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China;

  • 2.

    The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou, 510006, China;

  • 3.

    School of Resource, Environment and Materials, Guangxi University, Nanning, 530000, China

  • Fund Project: Supported by Specialized Applied Science and Technology Research,Development and Major Transformation Project of Guangdong Province in 2017(2017B020236004) and the Specialized Applied Technology Research Development (major) of Guangdong Province in 2015(2015B020235013).

  • 摘要: 通过引入臭氧，加速沸石晶化，从而缩短粉煤灰合成沸石时间，制备出高效且吸附氨氮容量大的人造沸石（Z-CFA-ozone）.通过XRD表征结果的分析，可知臭氧加速了沸石的晶化过程，沸石的合成时间缩短了12 h.BET结果可知，Z-CFA-ozone的比表面积为412.67 m2·g-1，是天然沸石的40倍.FTIR结果表明，Z-CFA-ozone对氨氮的吸附是通过离子交换作用，且加入臭氧后Z-CFA-ozone自身表面结构基本保持不变.正交实验结果表明，对Z-CFA-ozone吸附氨氮性能的影响中，臭氧浓度影响最大，温度次之，晶化时间、pH最小.准二级动力学模型和Langmuir等温吸附模型均可较好地拟合其吸附过程.热力学分析表明，Z-CFA-ozone对氨氮的吸附是自发的吸热反应.
    Abstract: Through bubbling with ozone, artificial zeolite with short time and high ammonium adsorption capacity was synthesized from coal fly ash (Z-CFA-ozone). Compared with the normal synthetic product, the corresponding XRD (X-ray Diffraction) patterns indicated the synthetic process of Z-CFA-ozone was accelerated by ozonation, which could save 12 hours. BET (Brunauer-Emmett-Teller) surface area measurement results showed that specific surface area of Z-CFA-ozone was 412.67 m2·g-1, which was almost 40 times larger than that of natural zeolite. Fourier-transformed infrared results revealed that ammonium (NH4+-N) was adsorbed on Z-CFA-ozone by ion-exchange, and the structure of Z-CFA-ozone did not change after bubbling with ozone. Orthogonal tests analysis showed that the order of factors affecting the NH4+-N adsorption capacity of Z-CFA-ozone was ozone concentration, temperature, crystallization time, and pH. The adsorption process fitted well with the pseudo-second-order kinetics model and the Langmuir isotherm model. Thermodynamic study revealed the adsorption process of NH4+-N by Z-CFA-ozone was primarily due to spontaneous endothermic reaction.
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  • 收稿日期:  2018-06-11
  • 刊出日期:  2019-04-15

臭氧加速人造沸石的合成及其对氨氮吸附特性影响

  • 1.  环境与能源学院, 华南理工大学, 广州, 510006;
  • 2.  污染控制与生态修复重点实验室, 华南理工大学, 广州, 510006;
  • 3.  资源环境与材料学院, 广西大学, 南宁, 530000
  • 收稿日期:  2018-06-11
基金项目:

广东省应用型科技研发专项（2015B020235013）和广东省应用型科技研发及重大科技成果转化专项（2017B020236004）资助.

摘要: 通过引入臭氧，加速沸石晶化，从而缩短粉煤灰合成沸石时间，制备出高效且吸附氨氮容量大的人造沸石（Z-CFA-ozone）.通过XRD表征结果的分析，可知臭氧加速了沸石的晶化过程，沸石的合成时间缩短了12 h.BET结果可知，Z-CFA-ozone的比表面积为412.67 m2·g-1，是天然沸石的40倍.FTIR结果表明，Z-CFA-ozone对氨氮的吸附是通过离子交换作用，且加入臭氧后Z-CFA-ozone自身表面结构基本保持不变.正交实验结果表明，对Z-CFA-ozone吸附氨氮性能的影响中，臭氧浓度影响最大，温度次之，晶化时间、pH最小.准二级动力学模型和Langmuir等温吸附模型均可较好地拟合其吸附过程.热力学分析表明，Z-CFA-ozone对氨氮的吸附是自发的吸热反应.

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