1. Key Laboratory of Green Process and Engineering; Institute of Process Engineering, Chinese Academy of Sciences; Beijing, 100190 P. R. China
2. National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology; Institute of Process Engineering; Chinese Academy of Sciences; Beijing, 100190 P. R. China
3. University of Chinese Academy of Sciences; No.19A Yuquan Road Beijing, 100049 P. R. China