| 改性膨润土对氨氮废水吸附性能的研究 |
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| 引用本文： | 王雅萍,刘云,董元华,马毅杰.改性膨润土对氨氮废水吸附性能的研究[J].应用化工,2011,40(7). |
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| 作者姓名： | 王雅萍 刘云 董元华 马毅杰 |
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| 作者单位： | 1. 安徽工业大学,建筑工程学院,安徽,马鞍山,243000
2. 中国科学院南京土壤研究所,土壤与农业可持续发展国家重点实验室,江苏,南京,210008 |
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| 摘 要： | 用内蒙膨润土及其碱改性膨润土进行模拟氨氮废水的脱氮实验研究。结果表明,在氨氮溶液初始浓度为300 mg/L,pH值为3.0～7.0时,相对于天然膨润土,碱改性膨润土对氨氮的吸附量有了很大提高,其吸附等温线符合Freundlich和Langmuir方程,且对氨氮的吸附动力学符合准一级和准二级吸附动力学模型,说明化学吸附和物理吸附共同起作用;在应用于畜禽废水处理中,碱改性膨润土对氨氮去除率达到91.0%。
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| 关 键 词： | 膨润土 氨氮 吸附作用 改性 |
Adsorption of ammonia nitrogen on modified bentonite in waste water |
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| WANG Ya-ping,LIU Yun,DONG Yuan-hua,MA Yi-jie.Adsorption of ammonia nitrogen on modified bentonite in waste water[J].Applied chemical industry,2011,40(7). |
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| Authors: | WANG Ya-ping LIU Yun DONG Yuan-hua MA Yi-jie |
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| Affiliation: | WANG Ya-ping1,LIU Yun2,DONG Yuan-hua2,MA Yi-jie2 (1.Institute of Architectural Engineering,Anhui University of Technology,Maanshan 243000,China,2.State Key Laboratory of Soil and Sustainable Agriculture,Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008,China) |
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| Abstract: | The adsorption of ammonia nitrogen in waste water on natural bentonite and modified bentonite,collected from Inner Mongolia was discussed.Results showed that the maximum adsorption capacity of modified bentonite was observed at pH 3.0~7.0 when the initial concentration of ammonia nitrogen was 300 mg/L.The ammonia nitrogen adsorption data on modified bentonite were well fitted by Langmuir and Freundlich isotherm.The ammonia nitrogen adsorption dynamics can be best described by the pseudo first-order and seco... |
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| Keywords: | bentonit ammonia nitrogen adsorption modification |
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