The concentration variation of heavy metals in sediments of a typical coal-mining induced subsidence surface water in Huainan mining area were investigated by inductively coupled plasma atomic emission spectroscopy(ICP-AES). The concentrations of these elements were compared with their background values proposed by Hakanson before industrialization. The further assessment of heavy metal pollution was conducted on the basis Potential Ecological Risk Index(PERI). Additionally, sediment quality for the metals ...