煤矿地下水库对含不同赋存形态有机物及重金属矿井水净化效果研究

doi:10.11799/ce202001025

Abstract

Abstract: The effective treatment of pollutants in the mine water by the fallen rock in the goaf has important practical significance for evaluating the underground reservoir technology, improving the comprehensive utilization of mine water and comprehensive utilization of coal gangue. In this paper, three underground water reservoirs in Daliuta Coal Mine in Shendong Mining Area are taken as research objects, and three influent samples, four effluent samples and one fissure water samples are collected, focusing on organic matter and heavy metals in different occurrence states. The removal of pollutants from water bodies in the underground reservoir of Daliuta Coal Mine is analyzed. The results show that the clay mineral content in the goaf of the underground reservoir of Daliuta Coal Mine accounts for about 35% of the clay mineral content and has a strong adsorption capacity. The underground water storage system of Daliuta Coal Mine has better purification effect on mine water. The suspended solids content of the effluent is lower than 182mg/L, and the removal rate can reach 80%~93%. A large amount of suspended solids can be removed. The effluent COD content is less than 35mg/L, the removal rate can reach 38%~61%, partial COD can be removed. Analysis shows that the particulate organic matter can be removed with the sedimentation of suspended particles, and the soluble organic matter can be removed by the adsorption of clay minerals. Data display that 99% of Fe and 84% of Mn in the influent are present on suspended particulate matter. After treatment in the groundwater reservoir, the removal rate of Fe in the mine water can reach 68%~100%, and the removal rate of Mn can reach 75%~99%, indicating that the groundwater reservoir can play a certain role in removing heavy metals from suspended particulate matter.

CLC Number:

TD74

References 21

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Purification Effect Study of Coal Mine Groundwater Reservoir on Mine Water Containing Organic Compounds and Heavy Metals in Different Occurrence Forms

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