探地雷达评估铅迁移的案例研究

Galih Prasetya Dinanta , Noviarso Wicaksono , Wahyu Hidayat , Rachmat Ramadhan , Muhammad Rifat Noor , Daniel Cassidy , Yanto Sudiyanto , Eddy Heraldy , Afifuddin , Muhammad Razzaaq Al Ghiffary
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本文描述了表征地表处理电池中铅(Pb)浸出引起的地表污染的研究,铅已随地下水运动而扩散。受污染的土壤和含水层位于Matano地层(印度尼西亚苏拉威西)。探地雷达用于探测和描绘铅污染土壤(即固相铅)。固相和水相中的铅在受到电磁波(EM)时具有不同的特性和响应。许多研究已经使用地质雷达来绘制地下固相铅污染的地图。GPR使用EM作为基础介质来接收地下图像,并且可用于检测固相Pb污染,但不能检测水相Pb。修复过程的第一步是使用探地雷达描绘地下的固相铅污染,这需要岩土工程调查来支持探地雷达。然后采集土壤和含水层固体样品,使用X射线荧光(XRF)对铅浓度进行量化。我们收集了15条GPR测量线和11个土壤样本来量化Pb。探地雷达天线使用600 MHz和900 MHz的频率。研究结果表明,在3米至4米的深度处有一层粘土层,这层粘土层似乎是铅污染地下水向下迁移的屏障。探地雷达地下剖面图像中的阴影带和低反射率被用于识别Pb污染,其不同波长范围在0.36 m和0.45 m之间。我们从本研究的结果得出结论,探地雷达是描绘Pb污染从源头向东垂直和水平扩散的有效工具。
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Case study of ground penetration radar (GPR) to assess lead migration

This paper describes research to characterize subsurface contamination caused by leaching of lead (Pb) from batteries disposed of at the surface, which has spread with groundwater movement. The contaminated soils and aquifer are located in the Matano formation (Sulawesi, Indonesia). Ground Penetrating Radar (GPR) was used to detect and delineate Pb-contaminated soils (i.e., solid-phase Pb). Lead in the solid and aqueous phase have different characteristics and responses when subjected to electromagnetic (EM) waves. Many studies have used GPR to map solid-phase Pb contamination in the subsurface. GPR uses EM as the base medium to receive subsurface images and is useful for the detection of solid-phase Pb contamination but cannot detect aqueous-phase Pb. The first step in the remediation process was to delineate solid-phase Pb contamination in the subsurface using GPR, which required a geotechnical survey to support GPR. Samples of soil and aquifer solids were then taken to quantify lead concentrations using X-ray fluorescence (XRF). We collected 15 lines of GPR measurements and 11 soil samples to quantify Pb. Frequencies of 600 MHz and 900 MHz were used for the GPR antenna. The results identified a clay layer at a depth of between 3 m and 4 m, which appears to have served as barrier to downward migration of Pb-contaminated groundwater. A shadow zone and low reflectance in the GPR subsurface section images were used to identify as the Pb contamination, which has a distinct wavelength ranging between 0.36 m and 0.45 m. We conclude from the results of this study that GPR was an effective tool for the delineation of the vertical and horizontal spread of Pb contamination eastward from the source.

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