1. Research Center for Eco-Environmental Engineering, Dongguan University of Technology, No. 1 University Road Songshanhu Zone, Dongguan City, Guangdong Province 523106, P. R. China
2. College of Chemical Engineering and the Environment, Dalian University, No. 10 Xuefu Street Development Zone, Dalian City, Liaoning Province 116622, P. R. China
3. Institute of Environmental and Ecological Engineering, Guangdong University of Technology, No. 100 Waihuan West Road University Town Panyu District, Guangzhou City, Guangdong Province 510006, P. R. China