1. College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, China
2. Key Laboratory of Environment Biology and Pollution Control, College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China
3. School of Resources and Environment, Hunan University of Technology and Business, Changsha, 410205, PR China
4. School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore 637459, Singapore