National Engineering Research Center of Coal MineWater Hazard Controlling University of Miningand Technology 100083;
China University of Mining and Technology 100083;
School of Metallurgical and Ecological Engineering of Science and Technology Beijing 100083;
Geological Survey Academy of Inner MongoliaAutonomous Region 010000 Mongolia Autonomous Region;
Heavy metal(loid)s; Contamination indices; Ecological risks; Human health risks; Chifeng;