土壤学报英文版
0564-3929
2005
42
6
930
935
10.11766/trxb200410220608
article
不同质地土壤中铜离子运移阻滞因子研究
RETARDING FACTORS OF COPPER MOVEMENT IN SOILS DIFFERENT IN TEXTURE
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。
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.
铜离子;对流-弥散方程;混合置换实验;阻滞因子;穿透曲线
Copper;Convection-dispersion equation;Miscible displacement experiments;Retarding factor;Breakthrough curve
刘庆玲,徐绍辉
Liu Qingling and Xu Shaohui
trxben/article/abstract/20050608