1. College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, 8 South Lushan Road, Yuelu District, Changsha 410082, P.R. China
2. School of Minerals Processing and Bioengineering, Central South University and Key Laboratory of Biohydrometallurgy (Central South University), Ministry of Education, 932 South Lushan Road, Yuelu District, Changsha 410083, P.R. China