不同质地土壤中铜离子运移阻滞因子研究
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* 国家自然科学基金项目(40271059)资助


RETARDING FACTORS OF COPPER MOVEMENT IN SOILS DIFFERENT IN TEXTURE
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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。

    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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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. DOI:10.11766/trxb200410220608 Liu Qingling, 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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  • 收稿日期:2004-10-22
  • 最后修改日期:2005-02-25
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  • 在线发布日期: 2013-02-25
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