The present study purpose was to identify the flow characteristics of the drainage filter considering the characteristics of the landfill site, and to study the basic technology for efficient remediation of heavy metals. To this end, copper heavy metal was selected in consideration of landfill characteristics, and a study on flow characteristics was conducted using hydrophobic coated capillary tubes and microparticles. It was confirmed that the flow rate decreased as the pH increased at the hydrophobic surface, and pH 4, 6, and 8 flowed similarly in the center of the capillary tube, but decreased at pH 10. In the bottom part, it moved at the slowest speed of 1~4 μm/s and middle of center moved 17~25 μm/s. There was little change in flow in the CFD (Computational Fluid Dynamics) numerical analysis considering the surface contact angle, which is a hydrophobic characteristic, and the velocity coefficient was presented by regression analysis through the experimental results. In this way, the current study will be a basic examination of the selective remediation process of pH on hydrophobic coated surfaces.

中文翻译：

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疏水涂层和pH值变化对重金属铜微流体流动特性的影响

本研究的目的是根据垃圾填埋场的特征来识别排水过滤器的流动特性，并研究有效修复重金属的基本技术。为此，考虑到垃圾填埋场特性选择了铜重金属，并使用疏水涂层毛细管和微粒对流动特性进行了研究。可以确定的是，流速随着疏水表面pH的增加而降低，pH 4、6和8在毛细管的中心类似地流动，但在pH 10处降低。最低速度为1〜4μm/ s，中心位置移动了17〜25μm/ s。考虑到表面接触角，CFD（计算流体动力学）数值分析中的流量变化很小，这是一种疏水特性，通过实验结果进行回归分析，得到了速度系数。这样，当前的研究将是对疏水性涂层表面上pH的选择性修复过程的基础检查。