1. Dept. of Chemical and Biomolecular Engineering, Hong Kong Univ. of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.
2. Environmental Engineering Program, School of Engineering, Hong Kong Univ. of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.
3. Professor, Dept. of Chemical and Biomolecular Engineering, Hong Kong Univ. of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.
4. Professor, Dept. of Chemical and Biomolecular Engineering, Hong Kong Univ. of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China (corresponding author).