Effect of Operational Parameters on Recovery of Lithium from Brine with Bipolar Membrane Electrodialysis
Makaleler > Tam Makale · 2022
Yazarlar: Tuğçe Zeynep Kaya, Ezgi Çermikli, Yakubu Abdullahi Jarma, Esra ALTIOK, Deniz İpekçi, Müşerref ARDA, Nalan KABAY
Journal of Membrane Science and Research, SCI Expanded İndekslerine Giren Dergi, Uluslararası, Scopus, 2022, cilt 8
DOI: 10.22079/JMSR.2022.549814.1537
Özet
In this research, the effect of operational parameters on removal and recovery of lithium simultaneously from brine by electrodialysis (ED) method with bipolar ion-exchange membranes (BM) having 10 membrane triplets of cation exchange membranes (CEMs), anion exchange membranes (AEMs) and bipolar membranes (BMs) was investigated. The Mega EDR-Z-Full-V4 model BMED system was employed to produce lithium hydroxide from brine containing lithium ions. Four different concentrations of LiCl solutions were used in the sample compartments 34, 68, 170, and 340 mg Li+/L. Also, the effects of concentrations of acid (HCl) and base (NaOH) solutions (0.003 M and 0.05 M) in the acid and base compartments in addition to the electrical potentials (20 and 25 V) were investigated. A NaOH solution with 0.1 M concentration was used as the electrode solution for all tests run. As a result of the study operated with 0.05 M HCl and 0.05 M NaOH solutions at 20 V, the lithium removal percentages were obtained as 98.6, 99.2, 99.7, and 99.6% while the lithium recoveries were 75.5, 54.5, 55.4, 51.2% at four different concentrations of LiCl as 34, 68, 170, 340 mg Li+/L, respectively. When the lithium concentration of the sample solution increased, the lithium removal remained constant. But the lithium recovery decreased and the lithium concentration in the base recovery compartment increased. The mass transfer coefficient of lithium was high when the electrical potential applied is high but it decreased with an increase in lithium concentration.