Abstract As an applying potential for a part of production of lithium (Li) from salt lake brine, forward osmosis was investigated by using semi-permeable membranes, sodium chloride (NaCl) and magnesium chloride (MgCl2) as draw solutions under several operational conditions. Cellulose triacetate and thin-film composite membranes and their orientations were compared. The results indicated that concentration of Li was higher using the thin-film composite membrane with MgCl2 as the draw solution. The effect of pH was insignificant. The results also showed that water flux decreased with increasing Li concentration on the feed side. Internal concentration polarization played an important role when rejection of Li was higher in the active layer facing feed solution system.

中文翻译：

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通过正向渗透浓缩锂

摘要 作为从盐湖卤水生产锂（Li）的一部分的应用潜力，通过使用半透膜、氯化钠（NaCl）和氯化镁（MgCl2）作为汲取液在几种操作条件下研究了正向渗透。比较了三乙酸纤维素和薄膜复合膜及其取向。结果表明，以MgCl2为驱动液的薄膜复合膜，Li浓度较高。pH 值的影响不显着。结果还表明，水通量随着进料侧锂浓度的增加而降低。当面向进料溶液系统的活性层中 Li 的排斥率较高时，内部浓差极化起到了重要作用。