LIU Yun-qin1,2,3, LIU Yun-guo1,2 , GUO Yi-ming1,2, HU Xin-jiang1,2
(1. College of Environmental Science and Engineering, Hunan Univ, Changsha, Hunan410082, China; 2. Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha410082, China; 3.Hunan Vocational College of Commerce, Changsha, Hunan 410205, China)