1. School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, China
2. Iron Man Environmental Technology Co., Ltd., Foshan 528000, China
3. Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon 999077, Hong Kong
4. School of Housing, Building and Planning, Universiti Sains Malaysia, George Town 11800, Pulau Pinang, Malaysia