School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China. E-mail: liuzhihual61 @163.com;
Bourns College of Engineering, Center for Environmental Research and Technology, and Department of Chemical and Environmental Engineering University of California, Riverside, CA 92507, USA;
Department of Mechanical Engineering, University of Engineering and Technology, Lahore 54000, Pakistan;
Chinese Research Academy of Environmental Sciences, Beijing 100012, China;