1. Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources; Qinghai Institute of Salt Lakes, Chinese Academy of Sciences; 810008 Xining China
2. Qinghai Engineering and Technology Research Center of Comprehensive Utilization of Salt Lake Resources; 810008 Xining China
3. University of Chinese Academy of Sciences; 100049 Beijing China
4. Qinghai Salt Chemical Products Supervision and Inspection Center; 816099 Geermu China