Электронный каталог

Статья

Butylskii, D.Yu.
Selective Recovery of Lithium Ion from Its Mixed Solution with Potassium and Sodium by Electrobaromembrane Method / D.Yu.Butylskii, P.Yu.Apel, [et al.] // Separation and Purification Technology [Electronic resource]. – 2024. – Vol. 343. – P. 126675. – URL: https://doi.org/10.1016/j.seppur.2024.126675. – Bibliogr.: 84.

Recovery of valuable (such as Li&sup(+)) ions from natural and technogenic brines is an important issue. Pressure-driven and electrically-driven membrane processes that employ only one driving force are effective in separating monovalent and multivalent ions. However, these processes are not quite suitable for separating different monovalent ions. In this study, two oppositely directed fields, electric and pressure fields, were applied across a track-etched membrane (TEM). The separation of Li&sup(+) from a mixed solution simulating a natural brine was studied at fixed current density 117 A/m&sup(2) and pressure difference 0.2 bar. The Li&sup(+) flux and the Na&sup(+) and K&sup(+) fluxes occurred in opposite directions. These fluxes were stable during the 40 h continuous experiment and were close to 0.08 mol/(m&sup(2) × h) (Na&sup(+)), 0.24 mol/(m&sup(2) × h) (K&sup(+)) and –0.07 mol/(m&sup(2) × h) (Li&sup(+)). Initially, the both solutions circulating next to the TEM were identical and contained 0.07 M LiCl, 0.075 M KCl and 0.055 M NaCl. For the first time, Li&sup(+) was selectively extracted from a solution containing also K&sup(+) and Na&sup(+). With increasing time, one of the circulating solutions was enriched in Li+ and the other one enriched in Na&sup(+) and K&sup(+). A mathematical model based on the TMS theory was developed and applied.



Спец.(статьи,препринты) = С 44 б - Разделение химических элементов экстракционными и ионообменными методами
ОИЯИ = ОИЯИ (JINR)2024
Бюллетени = 4/025