1. Key Laboratory of bioelectrochemical water pollution control technology in Tangshan City, North China University of Science and Technology, Tangshan 063009, P.R. China
2. College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan 063009, P.R. China
3. Hebei Mining Area Ecological Restoration Industry Technology Research Institute, North China University of Science and Technology, Tangshan 063009, P.R. China
4. College of Mining Engineering, North China University of Science and Technology, Tangshan 063009, P.R. China