1. Guangzhou Municipal Engineering Design & Research Institute, Guangzhou, China
2. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China
3. School of Civil Engineering, Guangzhou University, Guangzhou, China
4. School of municipal and environmental engineering, Shenyang Jianzhu University, Shenyang, China
5. School of Environment and Safety Engineering, North University of China, Taiyuan, China