| 高表面活性矿物对Zn~(2+)的吸附机理及其环境意义 |
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| 引用本文： | 吴平霄,廖宗文,毛小云.高表面活性矿物对Zn~(2+)的吸附机理及其环境意义[J].矿物学报,2001(3). |
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| 作者姓名： | 吴平霄 廖宗文 毛小云 |
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| 作者单位： | 华南理工大学环境科学与工程系 广东广州510640
(吴平霄),华南农业大学资源环境学院 广东广州510642
(廖宗文),华南农业大学资源环境学院 广东广州510642(毛小云) |
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| 基金项目： | 广东省自然科学基金资助项目 ( 994161,0 0 0 62 3) |
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| 摘 要： | 本文利用高表面活性矿物蒙脱石、蛭石、沸石在一定的介质条件下对Zn2 +进行吸附实验研究。蒙脱石和蛭石对Zn2 +的等温吸附线呈双“S”型 ,而沸石对Zn2 +的等温吸附线则呈“Langmuir”型。三种矿物对Zn2 +的吸附容量大小顺序为 :蒙脱石 >蛭石 >沸石。运用粉晶X射线衍射、红外光谱、差热及热重分析等技术对矿物及矿物吸附Zn2 +后的结构特征进行了研究。结果表明 ,蒙脱石吸附锌后其层间域中吸附锌大量水解形成新的物相 ,而蛭石与沸石吸附锌后水解很少。这为利用高表面活性矿物控制和治理环境污染及其可循环利用提供了理论依据。
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| 关 键 词： | 高表面活性矿物 吸附 结构 环境意义 |
THE ADSORPTION MECHANISM TO Zn~(2+) ON HIGHLY SURFACE-ACTIVATED MINERALS AND ITS ENVIRONMENTAL SIGNIFICANCE |
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| Wu Pingxiao,Liao Zongwen,Mao Xiaoyun.THE ADSORPTION MECHANISM TO Zn~(2+) ON HIGHLY SURFACE-ACTIVATED MINERALS AND ITS ENVIRONMENTAL SIGNIFICANCE[J].Acta Mineralogica Sinica,2001(3). |
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| Authors: | Wu Pingxiao Liao Zongwen Mao Xiaoyun |
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| Institution: | Wu Pingxiao 1 Liao Zongwen 2 Mao Xiaoyun 2 |
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| Abstract: | In this paper we use highly surface-activated minerals-montmorillonite, vermiculite, zeolite to adsorb Zn 2+ under certain conditions. The Zn 2+ adsorption isotherms of montmorillonite and vermiculite are of the double !S" type, while the Zn 2+ adsorption isotherms of zeolite are of the !Langmuir" type. The Zn 2+ adsorption capacity gradation of the three minerals is montmorillonite > vermiculite > zeolite. We also use XRD, IR, DTA and TG to analyze the crystal structure of minerals and zinc adsorption on them. It is revealed that after adsorbed on the minerals, zinc in the interlayer of montmorillonite can be hydrolyzed greatly to form a new mineral phase. While zinc in the interlayer of vermiculite and in the cages of zeolite can be hydrolyzed rarely. That can provide the theoretic grounds for the use of highly surface-activated minerals to control environmental pollution and its recycled utilization. |
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| Keywords: | highly surface-activated mineral adsorption structure environmental significance |
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