Separation of metal ions and resource utilization of magnesium from saline lake brine by membrane electrolysis

Pan, Xijuan; Zhang, Dou; Zhang, Ting‐an; Meng, Deliang; Fan, Yangyang

doi:10.1016/j.seppur.2020.117316

Cited by 38 publications

(9 citation statements)

References 24 publications

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“…을 장착된 막의 종류에 따라 양이온교환막 [9][10][11] , 음이온교 환막 12,13) , 전기투석 14) 및 비막기술 15) 로 분류하고 이에 대 한 각 메커니즘을 파악하였다. 그리고 관련 최근 연구 동 향 검토 및 향후 연구 방향을 제시하였다.…”

Section: 따라서 본 연구에서는 전해를 통한 마그네슘 회수 기술unclassified

Recent Trends and Future Perspectives of the Magnesium Recovery based on Electrolysis

Lee

2024

Resour. Recycl.

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The electrolysis for extracting magnesium from seawater or brine primarily involves recovery of magnesium via precipitation as the form of magnesium hydroxide. The technology is classified into cation-exchange membranes (CEM), anion-exchange (AEM) membranes, electrodialysis, and membraneless methods. Recent research has focused on enhancing the efficiency and selectivity of magnesium recovery from seawater or brine containing magnesium, with expectations of effective magnesium recovery even with normal seawater. In a future, the optimization of the selective and efficient recovery of magnesium and various valuable substances through long-term operation of scaled-up systems is crucial with enhancing economic and environmental viability. It is essential to realistically estimate operational costs considering the membrane's lifespan and replacement cycle. Also, detailed and practical process models should be developed based on monitoring data on various factors.

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Section: 따라서 본 연구에서는 전해를 통한 마그네슘 회수 기술unclassified

Recent Trends and Future Perspectives of the Magnesium Recovery based on Electrolysis

Lee

2024

Resour. Recycl.

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“…51,87,89 For example, Mg 2+ and Ca 2+ can be separated from brines as precipitates upon reaction with hydroxyl ions generated from water reduction in the cathode chamber. 89,92 The mentioned bivalent cations are the principal causes of membrane fouling during electromigration, and thus, this step appears important for the ME processes. The stream deprived of Mg 2+ and Ca 2+ can undergo other ME stages to allow the recovery of valuable industrial resources.…”

Section: Electrochemical Inorganics and Organics Separation: State Of...mentioning

confidence: 99%

Review—Electrochemical Separation of Organic and Inorganic Contaminants in Wastewater

Gao

Mosquera-Romero

Ntagia

et al. 2022

J. Electrochem. Soc.

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High energy input and chemical additions are typically needed to deal with persistent pollutants, organic and inorganic, and organometallic complexes in wastewater. Particularly, organometallic complexes decrease the removal efficiency for other pollutants being treated with conventional technologies, which can lead to high operational costs and residues formation. The improperly treated wastewater contains nutrients (nitrogen and phosphorus), heavy metals, and persistent organics, which should be removed or recovered before discharging. Electrochemical technologies can achieve concomitant removal of persistent pollutants and resource recovery from wastewater, with the benefits of low chemical input, cost-effectiveness and reduced water consumption. Here, we provide an overview of electrochemical technologies for the separation of organics and inorganics and their subsequent recovery. The focus is placed into electrodeposition, electrodialysis, membrane electrolysis, electrochemical oxidation, capacitive deionization, and bioelectrochemical systems. The main challenges considered at present are i) the cost and longevity of the materials, ii) the process efficiency and selectivity and iii) the complexity of the wastewater matrices. In this review it is projected that in the near future, the electrochemical separation and recovery of organics and inorganics will be preferred, as electrochemical cells powered by renewable energy can serve for decentralized and off-grid treatment approaches.

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“…14,15 On the other hand, the situation, unfortunately, has become worse in recent years since the lithium extraction from the saline lake has accelerated due to the huge demand for lithium in the lithium battery industry, which is also accompanied by the accumulation of magnesium resources. 14,16,17 Therefore, the comprehensive utilization of magnesium resources in saline lakes has become an important strategic problem to be solved. The main raw materials for preparing Mg−Al-LDHs were magnesium salt and aluminum salt.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Statistically, 8–10 tons of magnesium chloride would be generated for every 1 ton of potassium chloride production . Consequently, hundreds of millions of tons of waste magnesium chloride were not utilized and accumulated in the Qinghai saline lake, and a large number of magnesium chloride byproducts were redischarged into the saline lake or stored in the form of solid waste, which not only caused a serious waste of magnesium resources and damage to the saline lake ecological environment but also affected the sustainable production of potash fertilizer. , On the other hand, the situation, unfortunately, has become worse in recent years since the lithium extraction from the saline lake has accelerated due to the huge demand for lithium in the lithium battery industry, which is also accompanied by the accumulation of magnesium resources. ,, Therefore, the comprehensive utilization of magnesium resources in saline lakes has become an important strategic problem to be solved. The main raw materials for preparing Mg–Al-LDHs were magnesium salt and aluminum salt.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Aging Resistance of Organic Layered Double Hydroxide/Antioxidant Composite-Modified Asphalt

Jia³

et al. 2022

ACS Sustainable Chem. Eng.

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Two organic layered double hydroxides (OLDHs) intercalated by UV absorbents of para-aminobenzoic acid (PABA) and cinnamic acid (CA) were synthesized by the anion-exchange method, and their structures and properties were characterized. Then, the two OLDHs were applied to modify asphalt together with two different antioxidants, octadecyl-3-(3,5-di-tert-butyl-4hydroxyphenyl)-propionate (1076) and pentaerythritol tetrakis (3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate) ( 1010), aiming at synergistically enhancing the aging resistance of asphalt. The aging behaviors of modified asphalt were evaluated by the analyses of physical properties and chemical structures of modified asphalt after pressurized aging vessel (PAV) and ultraviolet (UV) aging tests. The results indicated that PABA and CA were successfully intercalated into the interlayers of LDHs and that the lipophilicity and UV absorbance of LDHs were significantly improved due to the organic intercalation. Hence, OLDH-modified asphalt presented enhanced anti-UV aging performance compared with LDH-modified asphalt. Meanwhile, the addition of organic LDH/ antioxidant composites could further improve the antiaging performance of asphalt, including thermal-oxidation and photo-oxidation aging resistance, exhibiting a synergistic effect. Furthermore, different combinations of OLDHs and antioxidants had different improvement effects on the aging properties of asphalt; to be specific, the composites of 1076/PABA-LDHs and 1010/CA-LDHs were superior to those of 1010/PABA-LDHs and 1076/CA-LDHs, respectively, in promoting the aging resistance of asphalt.

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Separation of metal ions and resource utilization of magnesium from saline lake brine by membrane electrolysis

Cited by 38 publications

References 24 publications

Recent Trends and Future Perspectives of the Magnesium Recovery based on Electrolysis

Recent Trends and Future Perspectives of the Magnesium Recovery based on Electrolysis

Review—Electrochemical Separation of Organic and Inorganic Contaminants in Wastewater

Investigation of Aging Resistance of Organic Layered Double Hydroxide/Antioxidant Composite-Modified Asphalt

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