| 不同质地土壤中铜离子运移阻滞因子研究 |
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| 引用本文： | 刘庆玲,徐绍辉.不同质地土壤中铜离子运移阻滞因子研究[J].土壤学报,2005,42(6):930-935. |
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| 作者姓名： | 刘庆玲 徐绍辉 |
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| 作者单位： | 1. 中国科学院南京土壤研究所,南京,210008
2. 青岛大学环境科学与工程系,山东青岛,266071 |
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| 基金项目： | 国家自然科学基金项目（40271059）资助 |
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| 摘 要： | 采用等温静态平衡吸附实验确定了重金属铜离子在3种不同质地土壤(砂质壤土,粉砂质粘土,壤质砂土)中的阻滞因子R,然后,结合混合置换实验中测定的铜离子和示踪剂离子的出流动态,采用了确定性平衡对流-弥散方程和确定性非平衡两区对流-弥散方程计算阻滞因子R。结果表明,Langmuir等温线形吸附方程可以准确描述铜离子的吸附特性;确定性平衡模型计算的R值与实测值接近;采用混合置换实验结合对流-弥散方程计算阻滞因子的方法耗时较长,精度不高。
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| 关 键 词： | 铜离子 对流-弥散方程 混合置换实验 阻滞因子 穿透曲线 |
| 收稿时间： | 2004-10-22 |
| 修稿时间： | 2004-10-222005-02-25 |
RETARDING FACTORS OF COPPER MOVEMENT IN SOILS DIFFERENT IN TEXTURE |
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| Liu Qingling and Xu Shaohui.RETARDING FACTORS OF COPPER MOVEMENT IN SOILS DIFFERENT IN TEXTURE[J].Acta Pedologica Sinica,2005,42(6):930-935. |
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| Authors: | Liu Qingling and Xu Shaohui |
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| Institution: | 1.Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 , China;2.Department of Environmental Science and Engineering, Qingdao University, Qingdao , Shandong 266071, China |
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| Abstract: | Retarding factors of copper movement in sandy loam,silty clay and loamy sand were determined in an experiment of isothermal static equilibrium adsorption and calculated by using the deterministic convection-dispersion equation and deterministic two-region nonequilibrium convection-dispersion equation coupled with the outflowing dynamics of copper ions and tracer ions measured in a miscible displacement experiment.The results indicate that the Langmuir linear isothermal adsorption could accurately describe adsorption behavior of copper;and that retarding factors calculated were close to measured values.In addition,to determine retarding factors,the method of using the miscible displacement experiments coupled with the convection-dispersion equation was both time-consuming and low in accuracy. |
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| Keywords: | Copper Convection-dispersion equation Miscible displacement experiments Retarding factor Breakthrough curve |
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