＜正＞Salt lakes of the Qaidam Basin consist of a series of lakes including Caerhan Lake,Dongtai Lake, Xitai Lake...
Shi-Qiang Wang~1,Wei Qiao~1,Ya-Fei Guo~1 and Tian-Long Deng~(1,2) 1 Tianjin Key Laboratory of Marine Resources and Chemistry,College of Marine Science and Engineering, Tianjin University of Science and Technology Tianjin,300457,P.R.China, 2 ACS Key Laboratory of Salt Lake Resources and Chemistry,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining,810008,P.R.China,
1 Introduction A salt lake is a naturally occurring complex body of water and salt interaction.More than 700 salt lakes are widely distributed in the area of the Qinghai-Tibet Plateau.Most of the salt lakes are famous for their abundance of lithium,potassium,magnesium,and boron resources.It
Experimental studies on the solubility, density, refractive index, and pH value in the aqueous system containing potassium, magnesium, and borate at 308.15 K were determined with the method of isothermal dissolution equilibrium. Based on the experimental results, the diagrams of solubility, density, refractive index, and pH value in this system were plotted. We found that there were one eutectic point and two crystallization regions corresponding to the large area of inderite (L + Mg2B6O11·15H2O) and the relatively small area of potassium borate tetrahydrate (L + K2B4O7 ·4H2O), respectively. Neither double salt nor solid solution was found in this system. The physicochemical properties (density, refractive index, and pH value) in solution at 308.15 K changed regularly with increasing potassium borate concentration. The calculated values of density and refractive index using empirical equations of the aqueous system were in good agreement with the experimental values.
SHI Chun-chengYANG JuanWANG Shi-qiangZHAO DongGUO Ya-feiDENG Tian-long
