| 改性沸石对Cu~(2+)的吸附、解吸特性研究 |
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| 引用本文： | 胡克伟,贾冬艳,颜丽,关连珠.改性沸石对Cu~(2+)的吸附、解吸特性研究[J].土壤通报,2011(4):848-851. |
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| 作者姓名： | 胡克伟 贾冬艳 颜丽 关连珠 |
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| 作者单位： | 辽宁农业职业技术学院;沈阳农业大学土地与环境学院; |
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| 摘 要： | 通过室内分析的方法研究了天然沸石及3种改性沸石对Cu2+的吸附及解吸特性。研究结果表明:沸石、改性沸石对Cu2+的等温吸附曲线符合Langmuir方程、Freundlich方程、Temkin方程,其中Freundlich方程的拟合性最好,相关系数在0.991～0.999之间。沸石及改性沸石对Cu2+吸附量大小顺序为NH4-Z>K-Z>Mg-Z>Z。该规律与改性阳离子水合半径、离子价数密切相关。沸石及改性沸石对Cu2+离子的解吸量和解吸率大小顺序为Z>Mg-Z>K-Z>NH4-Z。该规律与沸石的孔道居留效应有关。改性沸石一方面增加了Cu2+的吸附,同时又降低了Cu2+的解吸率,因此改性沸石在农业生产实践中,特别是土壤重金属污染的治理方面具有广阔的应用前景。
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| 关 键 词： | 沸石 改性沸石 铜 吸附 解吸 |
Effect of Natural Zeolite and Modified Zeolite on Adsorption and Desorption of Cu~(2+) |
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| HU Ke-wei,JIA Dong-yan,YNA Li,GUAN Lian-zhu.Effect of Natural Zeolite and Modified Zeolite on Adsorption and Desorption of Cu~(2+)[J].Chinese Journal of Soil Science,2011(4):848-851. |
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| Authors: | HU Ke-wei JIA Dong-yan YNA Li GUAN Lian-zhu |
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| Institution: | HU Ke-wei1,2,JIA Dong-yan1,YNA Li2,GUAN Lian-zhu2(1.Liaoning Agricultural Vocation-Technical College,Yingkou 115009,China,2.College of Land and Environment,Shengyang Agricultural University,Shenyang 110161,China) |
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| Abstract: | This test has studied the influence of natural zeolite and modified zeolites on the adsorption and desorption characteristic of Cu2+.The adsorption isotherm of natural zeolite,modified zeolites to Cu2+ are conformed to the Langmuir equation,the Freundlich equation and the Temkin equation.As for natural zeolite and modified zoelites,the correlation coefficients of Freundlich equation is the highest.The adsorptive capacity order of four kinds of zeolites to the Cu2+ is NH4-zeolite >K-zeolite > Mg-zeolite > Ze... |
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| Keywords: | Zeolite Modified zeolites Cu2 Adsorption Desorption |
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