1. State Key Laboratory of Chemical Engineering, Tianjin Key Laboratory of Membrane Science and Desalination Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P. R. China
2. 514 Brigade of North China Geological Exploration Bureau, Chengde 067000, P. R. China
3. School of Marine Science and Technology, Tianjin University, Tianjin 300072, P. R. China