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首页> 外文期刊>International Journal of Water Resources and Environmental Engineering >Phosphate transport variation in sand column
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Phosphate transport variation in sand column

机译：砂柱中磷的运移变化

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Groundwater pollution by human activities has been reported severally. Movement of leachate is identified as a major process of the phenomenon. Analytical work to replicate the process has been partially successful in soils. The objective therefore was to investigate the one dimensional (1-D) transport of phosphate at the side and centre of a sand column, verify and calibrate the model derived. Phosphate of known concentration was applied to the saturated sand column. A rainfall simulator located 45 cm above the column was showered over the soil. Samples were collected from drum outlets piped from the sides and centre of the column and analyzed at time intervals of 15, 30, 45, and 60 min. The rate of movement of phosphate with respect to depth in the soil were 0.045, 0.018, 0.013 and 0.013 ppm/cm at the side of the soil column while the rates at the centre were 0.036, 0.021, 0.014 and 0.001 ppm/cm at 15, 30, 45, and 60 min respectively. The model verified with experimental data showed predicted transport was in close agreement with experimental values with coefficient of correlation (r) ranging from 0.86 to 0.98. The amount of phosphate retained on the soil is higher at the centre than at the side of the soil column. The concentration of phosphate in the leachate generally decreased with depth and time.
机译：关于人类活动对地下水的污染已有报道。渗滤液的运动被认为是该现象的主要过程。在土壤中复制该过程的分析工作已部分成功。因此，目的是研究砂柱侧面和中心的磷酸盐的一维（1-D）传输，验证和校准导出的模型。将已知浓度的磷酸盐施加到饱和砂柱上。将位于柱上方45厘米处的降雨模拟器洒在土壤上。从从色谱柱的侧面和中心用管道输送的鼓出口收集样品，并在15、30、45和60分钟的时间间隔进行分析。相对于土壤深度，磷酸盐在土壤柱侧面的移动速率为0.045、0.018、0.013和0.013 ppm / cm，而在15时中心的速率为0.036、0.021、0.014和0.001 ppm / cm ，分别为30、45和60分钟。经实验数据验证的模型表明，预测的迁移率与实验值紧密相关，相关系数（r）为0.86至0.98。保留在土壤中的磷酸盐量在土壤中部比土壤柱侧高。渗滤液中磷酸盐的浓度通常随深度和时间而降低。

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