Boron removal from geothermal brine using hybrid reverse Osmosis/Microbial desalination cell system

Efficient Step-by-Step Desorption to Reduce Boron in Brine Lithium Extraction

“…31 Goren et al first used a hybrid reverse osmosis/microbial desalination cell system to remove boron from geothermal brine, with the final concentrations of boron in the treated permeate and concentrate streams being 3.29 and 2.99 mg/L, respectively, successfully minimizing the adverse effects of boron. 32 Inspired by the adjustability of the Li/Al-LDHs plate layer composition and the changeability of the interlayer anion, for the first time, this work proposes a process for reducing boron from the structure of Li/Al-LDHs before the lithium recovery stage. Depending on the optimal conditions in this unit for reducing the boron concentration, such as NaCl concentration, pH, and temperature, combined with characterization analysis and application in actual salt lake brine, the effectiveness of this strategy in reducing the boron concentration in the whole lithium recovery stage using Li/Al-LDHs as Li + adsorbents was illustrated further to improve the purity and recovery yield of lithium products.…”

“…Shi et al used a multistage centrifugal extractor to extract lithium ions from boron-containing brines, using N , N -bi-(2-ethylhexyl) acetamide (N523) and tributyl phosphate (TBP) as extractants, and successfully reduced the Mg/Li mass ratio of this system from 48 to 0.0015 and the H 3 BO 3 /Li mass ratio from 5.6 to 0.018, achieving the removal of impurities such as boron in the Li + extraction process . Goren et al first used a hybrid reverse osmosis/microbial desalination cell system to remove boron from geothermal brine, with the final concentrations of boron in the treated permeate and concentrate streams being 3.29 and 2.99 mg/L, respectively, successfully minimizing the adverse effects of boron …”