Study on vegetation absorbing toxic elements in coal wasting lands—Take Xinmm, Yanzhou and Tongchuan as example

Based on the status quo of gangue waste lands spread over Xinmi and Yanzhou mining area , this paper researched the characteristics of the absorption of different plants to toxic elements. The results are as follows: the absorption ability is not only related to quantity of the elements where the plants grow, but also related with the form of occurrence of the poisonous elements in the gangue, still related with the growth stage of the plants, ect. From the overall effects of the absorption, platycladus and meliaazedarach show the strongest effects, followed by robiniapseudoacacia, then ailanthus altissima and ulums pumila, thanks to the absorption effect of plant to the toxic elements, this can purify the surface air of mining area and the soil quality.