Dr. Zhenghe Xu graduated with a PhD in Materials Science and Engineering in 1990 from Virginia Polytechnic Institute and State University, Virginia, USA. He is currently Dean of College of Engineering at Southern University of Science and Technology in Shenzhen, P.R. China and Teck Professor in the Department of Chemical and Materials Engineering at University of Alberta (on leave), Edmonton, Canada. Dr. Xu’s main research area includes Surface and Interfacial Science, Materials and Minerals Processing, in particular in Flotation, and Waste Water Treatment.