A LABORATORY MODEL FOR THE TWO-PHASE FLOW CONTAMINANT TRANSIENT IN MULTI-POROUS MEDIA

Journal of Engineering and Sustainable Development Pub Date : 2023-11-01 DOI:10.31272/jeasd.27.6.6

Zahraa Akram Thijeel, Sadiq Salman Muhsun

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Abstract

The environmental behavior of rock and oil pollutants in soil has long been a focus of environmental protection research. In this research, a laboratory model was established to study the oil pollutant transfer process in two stages. Two samples from porous media of sandy soil and agricultural soil (organic) were used with oil as a pollutant. The oil is pumped through a system consisting of two pipes with a length of 4 m and a diameter of 0.07 m. Each pipe is assigned to a specific type of soil. The results showed that the organic soil needs a long time for the pollutants to travel over greater distances, while the sandy soil showed its ability to absorb and drain the pollutants and get rid of them faster. However, it was also found that both soils contain a small percentage of the pollutant after the water washing process, which lasts for more than (5 hours). The remaining oil percentage is estimated at about (0.1 ml), which is a very small percentage, and it is possible to get rid of it by increasing the washing time. It was found that the physical properties of the soil such as permeability and porosity have a significant effect on slowing down the speed of the pollutant and its transmission through the porous medium.

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多孔介质中两相流污染物瞬态的实验室模型

岩石和石油污染物在土壤中的环境行为一直是环境保护研究的热点。在本研究中，建立了一个实验室模型，研究了两个阶段的石油污染物转移过程。以沙质土壤和有机农业土壤的多孔介质样品为研究对象，以油类为污染物。抽油系统由两根长4米、直径0.07米的管道组成。每根管子都被指定用于一种特定类型的土壤。结果表明，有机土壤需要较长的时间才能使污染物传播更远的距离，而沙质土壤则表现出吸收和排出污染物的能力，并更快地摆脱它们。然而，也发现两种土壤在持续(5小时以上)的水洗过程后都含有很小比例的污染物。残油百分比估计在(0.1 ml)左右，这是一个非常小的百分比，可以通过增加洗涤时间来去除它。研究发现，土壤的渗透性和孔隙度等物理性质对减缓污染物在多孔介质中的传播速度有显著作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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