1. Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Qingdao 266237, China
2. Environment Research Institute, Shandong University, Qingdao 266237, China
3. Department of Chemical & Environmental Engineering, University of California, Riverside, California 92521, United States
4. School of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China