1. Safety, Environment, and Technology Supervision Research Institute of Petrochina Southwest Oil & Gasfield Company, Chengdu 610041, China
2. College of Biomass Science and Engineering, National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, China
3. Department of Chemical and Materials Engineering, University of Alberta, Edmonton T6G 1H9 Alberta, Canada