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Effects of Compaction and Initial Degree of Saturation on Contaminant Transport through Barrier

机译：压实度和初始饱和度对污染物通过屏障传输的影响

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The effect of different degree of saturation and compaction on the diffusive properties of soil is studied. Change in the diffusion of nonreactive chloride (Cl~-) through the barrier soil sample at different degree of saturation is experimentally obtained. Samples prepared at different densities and degrees of saturation are subjected to single reservoir diffusion testing for the determination of diffusion coefficient. Filter-paper method is used for obtaining soil-water characteristics curve (SWCC). Experimental results are used to calculate the values of diffusion coefficient by the method of curve fitting. The results show that for a particular density, the diffusion coefficient of the completely saturated sample is higher than that of unsaturated sample. However, when the samples are not fully saturated, rate of contaminant transport is less for the sample prepared at the higher water content. The results demonstrate the possible mechanism of transport of the contaminants in the soil when initial suction also adds to the mechanism.
机译：研究了不同饱和度和压实度对土壤扩散特性的影响。通过实验获得了不同饱和度下非反应性氯离子（Cl〜-）通过阻挡层土壤样品的扩散变化。对以不同密度和饱和度制备的样品进行单储层扩散测试，以确定扩散系数。用滤纸法获得土壤水特征曲线（SWCC）。实验结果用于通过曲线拟合的方法来计算扩散系数的值。结果表明，对于特定的密度，完全饱和样品的扩散系数要高于不饱和样品的扩散系数。但是，当样品未完全饱和时，对于水分含量较高的样品，污染物的传输速率会降低。结果表明，当最初的吸力也增加了土壤中污染物传播的可能机制。

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