钛系颗粒状吸附剂用于盐湖卤水中锂的吸附研究

Study on Adsorption of Lithium From Salt Lake Brine by Titanium-based Granulated Adsorbent

通过静态吸附实验研究钛系颗粒状吸附剂(GFLTG)对高镁锂比盐湖卤水中锂的吸附性能。结果表明,在水相初始pH=7.2、吸附时间24h的条件下,吸附剂对锂的吸附容量达到12.4mg/g,锂镁分离系数达到1307.5,吸附剂的吸附行为符合拟二级动力学模型。循环吸附实验表明,吸附剂具有优异的循环性能和化学稳定性,经过10次循环吸附试验,吸附剂对锂的吸附容量没有太大变化且钛的溶损率都在0.16%以下。

The adsorption performance of titanium-based granulated adsorbent (GFLTG) on lithium in salt lake brine with high magnesium-to-lithium ratio was studied by static adsorption experiments.The results showed that under the conditions of the initial pH of the aqueous phase=7.2,and the adsorption time of 24 h,the adsorption capacity of the adsorbent for lithium reached 12.4 mg/g,and the separation coefficient of lithium and magnesium reached 1307.5.The adsorption behavior of the GFLTG adsorbent was conformed to the pseudo-second-order kinetic model.Cyclic adsorption experiments showed that the adsorbent had excellent cycle performance and chemical stability.After 10 cycles of adsorption tests,the adsorption capacity of the adsorbent for lithium had not changed much and the dissolution rate of titanium is below 0.16%.