1. Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, P. R. China
2. Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, P. R. China
3. National-Regional Engineering Center for Recovery of Waste Gases from Metallurgical and Chemical Industries, Kunming University of Science and Technology, Kunming 650500, P. R. China