1. Research Assistant, Environmental and Municipal Engineering, Xi’an Univ. of Architecture and Technology, Xi’an 710055, China.
2. Professor, Environmental and Municipal Engineering, Xi’an Univ. of Architecture and Technology, Xi’an 710055, China.
3. Researcher, Environmental and Municipal Engineering, Xi’an Univ. of Architecture and Technology, Xi’an 710055, China (corresponding author).
4. Professor, Faculty of Engineering and Applied Science, Univ. of Regina, Regina, SK, Canada S4S 0A2.