• 标题：Li+ Enrichment Behavior in a Sodium Sulfate and Low Carbonate Salt Lake Brine
• 关键词：Salt Lake brines; Series Change Temperature; lithium; Enrichment; sulfur;Lithium magnesium ratio
• 作者：Yanfang Ma, Kanshe Li, Zhihong Zhang, Xin Liu

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 The Laguo salt lake has both carbonate- and sodium-sulfate-type characteristics, and is famous for its resources, such as Li, B, K, Rb and Cs. Accordingly, it may be a potential source of  lithium. The concentration of SO42− is known to influence the evaporation process of brine  enriched in lithium. Isothermal evaporation experiments show that Li+  precipitates as Li2SO4•H2O, which is very unfavorable for lithium enrichment processes. Therefore, a series of  temperature-variation experiments were conducted to effectively control the concentration of  SO42− in the brine. The SO42− content was reduced by lowering the brine temperature, and thus the desulfurization target was achieved, and the precipitation of lithium was controlled. At the same time, the Mg/Li, which is known to affect Li extraction, was reduced. From the temperature-variation experiments, we successfully obtained a high-lithium brine can be  obtained. Our results should provide a theoretical basis for the enrichment of lithium and the  efficient utilization of resources in a composite salt lake brine.