1. College of Chemical Engineering, Xiangtan University, Xiangtan, Hunan 411105, P.R. China
2. Hunan Provincal Engineerging Research Center of Sepiolite Resource for Efficient Utilization, Xiangtan, Hunan 411100, P. R. China
3. College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, P.R. China
4. CSIRO Energy, 71 Normanby Road, Clayton North, Victoria 3169, Australia
5. Xiangtan Sepiolite Technology Company, Ltd, Xiangtan, Hunan 411100, P. R. China
6. Hunan BG Well-point Environmental Science & Technology Company, Ltd, Changsha, Hunan 410000, P. R. China
7. School of Accounting, Capital University of Economics and Business, Beijing 100070, P. R. China
8. Institute for Materials and Processes, School of Engineering, University of Edinburgh, Mayfield Road, Edinburgh EH93JL, U.K.