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斜发沸石处理氨氮废水

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王文超, 管俊芳, 严春杰, 田晶晶, 曹刚. 斜发沸石处理氨氮废水[J]. 环境工程学报, 2014, 8(3): 1036-1040.
引用本文: 王文超, 管俊芳, 严春杰, 田晶晶, 曹刚. 斜发沸石处理氨氮废水[J]. 环境工程学报, 2014, 8(3): 1036-1040.
shu
Wang Wenchao, Guan Junfang, Yan Chunjie, Tian Jingjing, Cao Gang. Adsorption of ammonium-nitrogen in wastewater by clinoptilolite[J]. Chinese Journal of Environmental Engineering, 2014, 8(3): 1036-1040.
Citation: Wang Wenchao, Guan Junfang, Yan Chunjie, Tian Jingjing, Cao Gang. Adsorption of ammonium-nitrogen in wastewater by clinoptilolite[J]. Chinese Journal of Environmental Engineering, 2014, 8(3): 1036-1040.
shu

斜发沸石处理氨氮废水

  • 1.

    武汉理工大学资源与环境工程学院, 武汉 430070

  • 2.

    中国地质大学(武汉)材料科学与化学工程学院, 武汉 430074

  • 基金项目:

    国土资源公益性行业科研专项项目（201311024）

  • 中图分类号: X703

Adsorption of ammonium-nitrogen in wastewater by clinoptilolite

  • 1.

    School of Resource and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China

  • 2.

    School of Material Science and Chemical Engineering, China University of Geosciences, Wuhan 430074, China

  • Fund Project:

  • 摘要: 以斜发沸石为吸附剂处理氨氮废水，研究了斜发沸石粒径、反应时间、废水pH、废水氨氮初始浓度、斜发沸石用量对吸附的影响，分析了斜发沸石的吸附动力学和热力学特征。结果表明，在298 K下，当斜发沸石用量为7 g/100 mL，沸石粒径小于74 μm，废水氨氮初始浓度为200 mg/L，pH为7，吸附时间为3 h时，废水中氨氮的去除率可达到92.71%，斜发沸石吸附氨氮符合拟二级动力学方程。在温度为298~318 K之间时，吸附等温线更好地符合Freundlich方程。在此基础上，热力学计算发现，ΔH0 >0、ΔG0S0>0，表明氨氮在斜发沸石上的吸附是自发吸热过程，以物理吸附为主。
    Abstract: Using the clinoptilolite as adsorbing agent to adsorb ammonium-nitrogen of wastewater, various factors were studied, including clinoptilolite particle size, chemical reaction time, optimal pH, initial ammonium (NH4+) concentration and clinoptilolite dosage, the kinetic and thermodynamic models were analyzed. The experimental data indicated that when the dosage was 7 g/100 mL, the grain size was less than 74 μm, the ammonium (NH4+) concentration was 200 mg/L, the pH was 7, and the reaction time lasted 3 h, its removal rate was 92.71%. The pseudo second-order kinetic model provided more excellent kinetic data fitting at 298 K. At the temperature of 298~318 K, the Freundlich model agreed more with experimental data. Thermodynamic parameters analysis showed enthalpy (ΔH0)>0, free energy (ΔG0) S0)>0. These results indicated that the exchange of ammonium ion by clinoptilolite was spontaneously endothermic, mainly dominated by physical adsorption.
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出版历程
  • 收稿日期:  2013-05-05
  • 刊出日期:  2014-03-01
王文超, 管俊芳, 严春杰, 田晶晶, 曹刚. 斜发沸石处理氨氮废水[J]. 环境工程学报, 2014, 8(3): 1036-1040.
引用本文: 王文超, 管俊芳, 严春杰, 田晶晶, 曹刚. 斜发沸石处理氨氮废水[J]. 环境工程学报, 2014, 8(3): 1036-1040.
shu
Wang Wenchao, Guan Junfang, Yan Chunjie, Tian Jingjing, Cao Gang. Adsorption of ammonium-nitrogen in wastewater by clinoptilolite[J]. Chinese Journal of Environmental Engineering, 2014, 8(3): 1036-1040.
Citation: Wang Wenchao, Guan Junfang, Yan Chunjie, Tian Jingjing, Cao Gang. Adsorption of ammonium-nitrogen in wastewater by clinoptilolite[J]. Chinese Journal of Environmental Engineering, 2014, 8(3): 1036-1040.
shu

斜发沸石处理氨氮废水

  • 1. 武汉理工大学资源与环境工程学院, 武汉 430070
  • 2. 中国地质大学(武汉)材料科学与化学工程学院, 武汉 430074
  • 收稿日期:  2013-05-05
基金项目:

国土资源公益性行业科研专项项目（201311024）

摘要: 以斜发沸石为吸附剂处理氨氮废水，研究了斜发沸石粒径、反应时间、废水pH、废水氨氮初始浓度、斜发沸石用量对吸附的影响，分析了斜发沸石的吸附动力学和热力学特征。结果表明，在298 K下，当斜发沸石用量为7 g/100 mL，沸石粒径小于74 μm，废水氨氮初始浓度为200 mg/L，pH为7，吸附时间为3 h时，废水中氨氮的去除率可达到92.71%，斜发沸石吸附氨氮符合拟二级动力学方程。在温度为298~318 K之间时，吸附等温线更好地符合Freundlich方程。在此基础上，热力学计算发现，ΔH0 >0、ΔG0S0>0，表明氨氮在斜发沸石上的吸附是自发吸热过程，以物理吸附为主。

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