1. Department of Environmental Science and Engineering Xi'an Key Laboratory of Solid Waste Recycling and Resource Recovery State Key Laboratory of Multiphase Flow in Power Engineering School of Energy and Power Engineering Xi'an Jiaotong University 28 Xianning West Road Xi'an 710049 China
2. Department of Chemical and Process Engineering Faculty of Engineering and Physical Sciences University of Surrey Guildford Surrey GU2 7XH UK
3. Advanced Technology Institute University of Surrey Guildford Surrey GU2 7XH UK