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首页> 外文会议>Seventeenth Annual Meeting of the American Society for Surface Mining and Reclamation on A New Era of Land Reclamation June 11-15, 2000 - Tampa, Florida >Influence of Flue Gas Desulfurization Material (FGD) on Water Quality in an Abandoned Deep Mine
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Influence of Flue Gas Desulfurization Material (FGD) on Water Quality in an Abandoned Deep Mine

机译：废弃深井烟气脱硫物质（FGD）对水质的影响

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In this paper, a field study was carried out to examine the impact of flue gas desulfurization by-product (FGD) on water qulaity at an underground coal mine in ecentral-eastern Ohio. Between October, 1997 and January, 1998, FGD was injected into the down-dip protions of the Roberts-Dawson mine in an attempt to seal major seeps exiting the mine and to coat exposed pyritic surfaces. Immediately following grout injection, increases in acidity, iron, aluminum, sulfur, and calcium were observed in groundwater wells located within the mine voids near where grouting was carried out. Following this initial increase in concentrations, levels of most constituents have decreased to near pre-grouting levels. At one site, located within a minespoil pile, major improvements in water quality were observed following grout injection. Geochemical modeling indicates that groundwater within the mien voids was saturated with ferrihydrite and a number of iron and aluminum sulfate solids both before and after grout injection. These same waters were also found to be saturated with respect to calcium sulfate and gypsum immediately following grout injection. Changes in water levels or re-routing of drainage flow may have resulted in the dissolution of iron and aluminum sulfate salts, and also possibly the dissolution of ferrihydrite. Dissolution of the FGD grout material may have contributed to increases in calcium and sulfate concentrations in the drainage waters.
机译：在本文中，进行了一项野外研究，以检查俄亥俄州中东部东部一个地下煤矿的烟气脱硫副产物（FGD）对水质的影响。在1997年10月至1998年1月之间，FGD被注入到Roberts-Dawson矿的下倾部分，以试图密封从矿井出来的主要渗漏并覆盖暴露的黄铁矿表面。注浆后，立即在进行注浆的矿井空洞内的地下水井中观察到酸度，铁，铝，硫和钙的增加。在最初的浓度增加之后，大多数成分的水平已降至接近灌浆前的水平。在一个位于矿渣堆中的地点，注浆后观察到水质有了重大改善。地球化学模型表明，在灌浆前后，铁矿孔隙中的地下水都被水铁矿和大量的铁和硫酸铝固体饱和。灌浆后立即发现这些相同的水域中的硫酸钙和石膏饱和。水位的变化或排水流的重新路由可能导致硫酸铁和硫酸铝盐的溶解，以及三水铁矿的溶解。 FGD灌浆材料的溶解可能有助于增加排水中钙和硫酸盐的浓度。

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