1. College of Environmental and Municipal Engineering Shaanxi Key Laboratory of Environmental Engineering Key Lab of Northwest Water Resource Environment and Ecology MOE Xi'an University of Architecture and Technology Xi'an 710055 China
2. Key Laboratory of Membrane Separation of Shaanxi Province Research Institute of Membrane Separation Technology of Shaanxi Province Xi'an University of Architecture and Technology Xi'an 710055 China
3. State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai 200092 China