Geochemical behavior of heavy metals during the natural weathering of coal mine spoil

<正> Through the research on the geochemical facies of heavy metals in the coal mine spoils, it is found that the natural weathering process of coal mine spoil is a course of enrichment of heavy metals. In this process, the release of heavy metals is controlled by residual, but the migration and geochemical behavior of these metals are dominated by Fe-Mn oxides and organic matter. For the environmental geochemical effect of coal mine spoil, the pollution area caused by the heavy metals from the coal mine spoil is limited.