| 黄土中粘土矿物的提取及其对氯吡硫磷的吸附行为研究 |
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| 引用本文： | 贺磊.黄土中粘土矿物的提取及其对氯吡硫磷的吸附行为研究[J].西安文理学院学报,2014(4):95-99. |
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| 作者姓名： | 贺磊 |
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| 作者单位： | 陕西科技大学资源与环境学院; |
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| 基金项目： | 陕西科技大学研究生创新基金项目(2014009) |
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| 摘 要： | 以黄土为原料并从中提取粘土矿物,研究粘土矿物对氯吡硫磷的吸附行为,并从吸附等温线,动力学和热力学角度对其吸附机理进行探讨.吸附等温线模型研究表明,粘土矿物对氯吡硫磷的吸附属于Langmuir和Freundlich的复合型吸附;吸附动力学模型研究表明,该过程符合拟二级动力学方程;吸附热力学参数研究表明,该过程是一个自发的吸热反应,且主要作用为氢键吸附.研究结果有助于进一步探究土壤中残留农药的自净机理.
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| 关 键 词： | 黄土 粘土矿物 氯吡硫磷 吸附等温线 吸附动力学 热力学 |
On Loess Clay Mineral＇s Extraction and Its Adsorption of Chlorpyrifos |
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| HE Lei.On Loess Clay Mineral＇s Extraction and Its Adsorption of Chlorpyrifos[J].Journal of Xi‘an University of Arts & Science:Natural Science Edition,2014(4):95-99. |
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| Authors: | HE Lei |
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| Institution: | HE Lei (College of Resource ＆ Environment, Shaanxi University of Science ＆ Technology, Xi＇an 710021, China) |
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| Abstract: | We have extracted the clay mineral from loess and studied the adsorption of chlor- pyrifos by clay mineral and the adsorption mechanism in terms of isotherm, kinetics and ther- modynamics. The adsorptive isotherm model shows that clay mineral＇s adsorption of chlorpyrifos is in conformity with the isothermal adsorption equations of Langmuir and Freundlich. The ad- sorption kinetics studies indicate that the process of adsorption fits in with the pseudo-second order equation. The thermodynamics parameters manifest that the process is a spontaneous and endothermic reaction and the main mechanism is hydrogen-bonding. The research results will be helpful for further exploring the self-purification mechanism of pesticide residues in the soil. |
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| Keywords: | loess clay mineral chlorpyrifo adsorptive isotherm kinetics thermodynamics |
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