吸附
解吸
尖晶石
煅烧
离子
化学
扫描电子显微镜
无机化学
离子交换
透射电子显微镜
分析化学(期刊)
材料科学
锂(药物)
色谱法
催化作用
物理化学
有机化学
冶金
医学
内分泌学
复合材料
纳米技术
作者
Jiali Xiao,Xiao-Yao Nie,Shuangqing Sun,Xingfu Song,Ping Li,Jianguo Yu
标识
DOI:10.1016/j.apt.2015.01.008
摘要
A spinel-type Li4Mn5O12 precursor was synthesized by solid-phase reaction using inexpensive manganese and lithium salts as raw materials, where the two-step calcination procedure (at 543 K for 2 h and 673 K for 24 h) was adopted. The synthesized Li4Mn5O12 precursor was characterized using X-ray powder diffraction, scanning electron microscope, transmission electron microscopy, and micromeritics ASAP-2010C adsorption apparatus. Spherical MnO2⋅0.4H2O ion sieve was used to adsorb Li+ from Qarhan brine with a Mg2+/Li+ ratio of 746, after desorption the ratio was reduced to less than 1. Li+ adsorption capacity of the spherical ion sieve was studied by 55 cycle’s adsorption–desorption experiment, the adsorption capacity was ∼0.4 mmol g−1 and kept constant. Furthermore, a pH-dependent ion-exchange equilibrium model for Li+ adsorption was built for further optimization of the cyclic adsorption–desorption process to recover the Li+ from Qarhan brine.
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