1. Xiamen Key Laboratory of Municipal and Industrial Solid Waste Utilization and Pollution Control, College of Civil Engineering, Huaqiao University, Xiamen, Fujian 361021, P. R. China
2. Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, School of Environment, Shanghai Jiao Tong University, Shanghai 200240, China
3. Water Resources and Environmental Institute, Xiamen University of Technology, Xiamen, Fujian 361005, P. R. China
4. Xiamen Institute of Environmental Science, Xiamen, Fujian 361005, P. R. China
5. State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang 150090, P. R. China