INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2023
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IF 4.2
Mengxiang Lu,Liqiang Shao,Ying Yang,Ping Li
In view of the coexistence of lithium and boron in brines, in this article, the novel adsorption technology was developed for the simultaneous recovery of lithium and boron from brines based on the cooperative action of titanium-type lithium-ion sieves and N-methylglucamine boron specific resins. During the collaborative adsorption, lithium-ion sieves adsorbed Li+ ions based on the Li+/H+ ion-exchange mechanism, and the released H+ ions from lithium-ion sieves would be neutralized by the amine functional groups of the N-methylglucamine resins to enhance the Li+/H+ ion exchange. Meanwhile, the adjacent double hydroxyl functional groups of the N-methylglucamine resins formed preferentially the complexation adsorption with borate ions to recover boron from brines. The synergistic adsorption mechanism between lithium-ion sieves (home-made PVB-HTO granules) and N-methylglucamine boron specific resins (commercial D403 resins) was investigated experimentally in batch adsorbers. Furthermore, six groups of experiments were performed in the continuous mode for the simultaneous recovery of lithium and boron from the salt-lake brines with 50∼200 mg/L of Li and B contents and 50–200 of Mg/Li molar ratio, where three-stage continuous stirred–tank adsorbers containing 18 L of brine, 300 mL of PVB-HTO granules, and 600 mL of D403 resins were used for the lithium and boron recovery from brine. Then, the regeneration of the PVB-HTO granule-packed column by 0.3 M HCl solution was carried out to obtain the lithium-rich solution, and the regeneration of the D403 resin-packed column by 0.3 M HCl solution was performed to obtain the boron-rich solution. The feasibility and efficiencies of the adsorption method for the simultaneous recovery of lithium and boron from salt-lake brines will be evaluated.
研究领域:
化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
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2021
·Vol. 11
·期 26
·16096-16105
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IF 3.361
Zhenya Xu,Hui Su,Jian Zhang,Wensen Liu,Zhaowu Zhu,Jinggang Wang,Jing Chen,Tao Qi
The recovery of boron from salt lake brines has become an effective way to meet the increasing demand, particularly in China. In this study, nine commercially available monohydric alcohols with different structures were selected for boron extraction from a salt lake brine with high magnesium content. Passing through the optimization, isodecanol was finally selected for the detailed study on boron recovery from brine due to its moderate viscosity, lower solubility water entrainment and high extraction efficiency. Parameter effects on boron extraction were systematically studied, including equilibrium pH, organic concentration, phase ratio, temperature, and salting-out effect. A McCabe–Thiele diagram was established to determine the boron extraction and stripping stages. An organic solution containing 2.5 mol L−1 isodecanol was used for a simulated three-stage counter-current extraction test under optimized extraction conditions, and the boron extraction reached 99.07%. A simulated four-stage counter-current stripping test was carried out with water with the stripping efficiency of 98.71%. In total the boron recovery reached 97.79%. Additionally, the mechanism of boron extraction by isodecanol was investigated using both slope analysis method and Fourier transform infrared spectroscopy (FTIR). The stoichiometric ratio of isodecanol to boron required to form boric acid ester was found to be 1.268. These results indicate that the extraction system has great potential for commercial application in boron recovery from salt lake brines with high magnesium content.
研究领域:
化学工程
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环境科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2019
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IF 5.107
Mengjie Sun,Meng Li,Xu Zhang,Cuiming Wu,Yonghui Wu
Composite anion-exchange membranes with porous structures have been successfully prepared by incorporating quaternized graphene oxide (QGO) into P84 co-polyimide, and then undergoing the phase inversion, amination and quaternization processes. The membranes’ porous structures can be readily adjusted by the category of non-solvent during the phase inversion process. Large finger-like voids are present in the lower parts of the membrane cross sections by using water or 50% isopropanol aqueous solution, which facilitate the entrance of polyethylenimine chains into the membrane matrix, leading to higher degree of amination and quaternization. The incorporation of QGO does not influence the membrane morphology obviously, but can further enhance the ion exchange capacity (1.23–1.65 mmol/g) and decrease the membrane area resistance (1.6–1.9 Ω cm 2 ). The QGO-P84 composite membranes are used in bipolar membrane electrodialysis (BMED) for the removal of boron from synthetic model solutions (Na 2 B 4 O 7 ·10H 2 O, 1000 mg B/L). The finger-like pores decrease the steric resistance of boron transport, while the incorporation of QGO improves the membrane electro-chemical properties and thus the BMED performances. The separation efficiency is 76.6% after running 3 h under 30 V, the current efficiency is 94.9% and the energy consumption is 26.16 kW h/kg by using the optimal composite membrane. The BMED performances are better than those of commercial membrane CJMA-3 (separation efficiency of 51.6%, current efficiency of 81.2%, and energy consumption of 30.56 kWh/kg). Hence, the QGO-P84 composite membranes are effective for removal and recovery of boron from aqueous solution through BMED method.
研究领域:
材料科学
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环境工程
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电化学
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2024
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IF 1
Qinglong Luo,Lei Liu,Ruiqiang Dong,Zhongfu Cheng,Mingzhe Dong,Zhijian Wu,Jun Li,Xueli Huang
ABSTRACT The removal of boron from aqueous solution and the enrichment of boron from salt lake have attracted more attention. In this work, organo-inorganic hybrid mesoporous boron adsorbents were synthesized by tris(hydroxymethyl)methyl aminomethane (TRIS) grafted onto the meso-porous SBA-15, SBA-16 and MCM-41, respectively. And the structures are characterized by infrared, scanning electron microscopy, energy-dispersive X-ray, mapping, X-ray diffraction, point of zero charge, and Marvin laser particle size analyzer. The results showed that TRIS was successfully grafted onto SBA-15, SBA-16, and MCM-41. The adsorption isotherm and adsorption kinetics were best fitted with Langmuir model and pseudo-second-order rate equation, respectively. The adsorption capacity of the three adsorbents was 15.28, 15.70 and 14.17 mg/g, respectively. And the same functional group has little influence on the boron adsorption capacity of different carrier adsorbents of the same type (organosilicon material). These adsorbents have highly selective adsorption of boron, and maintain good lifetime after adsorption–desorption for 5 times, and the dissolution loss rate of SBA-16-TRIS after ten cycles was 0.93%.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
DOI
高影响因子
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