Study On The Impact Of Coal Gangue On The Surrounding Soil Environmental

Through the determination of content about Cu, Cd, Pd, Zn, Cr five heavy metal and microorganisms in coal gangue and its soil of coal gangue, based on Shaanxi Tongchuan Cui Home Gully Prison Coal. Analysis the impact about air storage coal gangue piled on soil environment in the plane, vertical and the time span. And through the investigation of the growth of vegetation surrounding, this paper analyzes the status of environmental effect.Cui coal gangue piles at mount in part, or about 30 years of gangue surrounding soil for research object. Different pile of coal gangue piled up, four directions about time estimation, respectively①20～30years,②15～20years,③8～15years and④0～8years. The second of the coal gangue piles spontaneous combustion once happened, seemed as red bottles. For the samplings to the coal gangue and the surrounding soil. Use the methord of atomic absorption spectrometry for heavy metal content asssay.And use Beef Extract Peptone medium for determination by flat count method for microbial biomass in the soil. To observe and analyze the vegetation on 4 coal gangue piles of the soil around gangue.The results showed that five kinds of heavy metals except the Cd are belower than the national secondary soil quality standard dates. The single pollution index of Cd is upto 3.03. Microbial biomass significantly reduced. The peripheral vegetation of coal gangue were contaminated, vegetation coverage is low, and summarized the oneness herbs grow, if dandelions, sticktight, castor oil plant, these three kinds of plants are summarized for Cd. Vegetation in the coal gangue outside the normal growth while 10m. Coal gangue piles of surrounding the influence of soil heavy metal pollution is serious, the microbial biomass, there are more serious influence, the overall response is obvious. The vertical section of soil heavy metal pollution results showed that affect mainly in 40cm deepth surface soil. The content of all the metal element is decrease with the increase of depth, In the 60cm following pollution to steady state, and less affected. The soil by coal gangue piles horizontal study showed that, the heavy metal pollution decrease with the distance increases. Microbial biomass in 3m away from coal gangue manifested to great influence.The datas far from 10m to the coal gangue approach to the standard datas of the unpollution soil.