Institution: | 1. Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education , Xiangtan University , Xiangtan , Hunan 411105 , P.R. China xtuzhou@yahoo.com.cn;3. Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education , Xiangtan University , Xiangtan , Hunan 411105 , P.R. China;4. Key Laboratory of Biogeology and Environmental Geology of Chinese Ministry of Education &5. Sino-Hungarian Joint Laboratory of Environmental Science and Health , China University of Geosciences , 430074 Wuhan , P.R. China |