1. College of Chemical Engineering, Huaqiao University, Xiamen361021, Fujian, China
2. Department of Civil, Construction and Environmental Engineering, North Dakota State University, Fargo, North Dakota58105, United States
3. Materials and Nanotechnology, North Dakota State University, Fargo, North Dakota58105, United States
4. Institute of Environmental Engineering, National Sun Yat-sen University, No. 70, Lian-Hai Road, Kaohsiung804, Taiwan