Reviews of studies on heavy metals in coal gangues

Having analyzed the heavy metal concentrations in the coal gangue as well as the soil,water,atmosphere and the plants nearby,we have found that: 1) the majority of our countries' coal gangue belongs to the ordinary solid rejects and the heavy mental elements doesn't exceed too much of the standard;2) the coal gangue doesn't have much influence on the soil,water and atmosphere in the neighborhood,neither does it suit cultivating food products;3) most of the vegetables grown on the restored gangues lands contain more heavy metal elements than allowed.