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. Petrochemical Research Institute, PetroChina, Beijing 102206, P. R. China
3. College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, P. R. China
4. School of Marine Science and Technology, Tianjin University, Tianjin 300072, P. R. China