1. SGS Hong Kong Ltd, Hong Kong
2. Faculty of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, People's Republic of China
3. Department of Applied Science, School for Higher and Professional Education (Chai Wan), Chai Wan, Hong Kong
4. Faculty of Science and Technology, Technological and Higher Education Institute of Hong Kong, Tsing Yi, Hong Kong
5. Department of Science and Environmental Studies, The Education University of Hong Kong, Tai Po, Hong Kong
6. Guizhou Academy of Sciences, Guiyang, People's Republic of China