Solvent Extraction Separation of Silver(I) and Zinc(II) from Nitrate Leach Solution of Spent Silver Oxide Batteries with D2EHPA

Cho, Sung-Yong; Lee, Won-geun; Sun, Panpan

doi:10.2320/matertrans.m2018394

Cited by 8 publications

(4 citation statements)

References 20 publications

(15 reference statements)

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“…However, hydrometallurgy remains one the most frequent strategies for metal recovery; involving leaching process for metal recovery from solid wastes [7,8]. The removal of metals from leachates may involve different processes such as solvent extraction [8][9][10][11][12], associated with electro-winning and redox processes [13,14], especially when the concentrations are high enough to make these processes competitive. For more dilute solutions (containing less than 200 mg Ag L −1 ), sorption processes may be more appropriate.…”

Section: Introductionmentioning

confidence: 99%

2-Mercaptobenzimidazole derivative of chitosan for silver sorption – Contribution of magnetite incorporation and sonication effects on enhanced metal recovery

Elwakeel

Al‐Bogami

Guibal

2021

Chemical Engineering Journal

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Section: Introductionmentioning

confidence: 99%

2-Mercaptobenzimidazole derivative of chitosan for silver sorption – Contribution of magnetite incorporation and sonication effects on enhanced metal recovery

Elwakeel

Al‐Bogami

Guibal

2021

Chemical Engineering Journal

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“…As expected, at pH 1.8, a complete removal is achieved at 0.1 g/L, while at 1 g/L the removal is 87.8%. Further in this study, the extraction of Zn(II) using [TOMA + ][Cl − ] in nitrate media will be explored for its practical application for nitrate leach solutions from industries such as spent silver oxide batteries [ 40 ] and waste printed circuit boards. [ 41 ] Additionally, this system has been less explored in the literature when compared to Zn(II) extraction with [TOMA + ][Cl − ] in chloride media.…”

Section: Resultsmentioning

confidence: 99%

Highly selective solvent extraction of Zn(II) and Cr(III) with trioctylmethylammonium chloride ionic liquid

et al. 2021

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This study investigates the recovery of Zn(II) and Cr(III) from aqueous solutions based on solvent extraction with trioctylmethylammonium chloride [TOMA+][Cl‐], commercialy named Aliquat 336. Single metal solutions and binary mixtures of both metals were considered. The effect of relevant operating conditions such as pH, contact time, initial concentration, O/A phase volumetric ratio, and temperature were evaluated. Additionally, loading capacity and stripping studies were performed. Results showed that [TOMA+][Cl−] is an effective extracting agent for Zn(II), reaching maximum removal capacity at pH 1.8 and demonstrating fast extraction kinetics. Extraction efficiencies above 99% were achieved at 0.5, 0.75, and 1.00 O/A volumetric phase ratios for 0.1 g/L initial Zn(II) concentration. At 1 g/L and 10 g/L concentration, for the same O/A ratios, approximately 88% of the initial Zn(II) was extracted. In contrast, it was found that negligible amounts of Cr(III) were transferred to the [TOMA+][Cl−] phase at the 1‐5 pH range. Selectivity studies showed that Zn(II) removal is boosted in the presence of Cr(III), although no Cr(III) is extracted. [TOMA+][Cl−] exhibited a high Zn(II) storage capacity, since after 25 loading cycles with 1 g/L, the loading capacity reached approximately 13.5 g/L, and after five loading cycles with 5 g/L, the capacity reached 19.4 g/L. Stripping tests revealed that NaOH is an efficient agent for the removal of Zn(II) from the ionic liquids, reaching 98.5% removal after two cycles, whereas HNO3 is not a suitable agent, reaching less than 40% removal after three cycles. [TOMA+][Cl−] revealed high potential for separating Zn(II) from Cr(III).

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“…Expensive equipment and precipitants (including flocculating agent) are inevitable for these methods 9) . Solvent extraction with various extractants, such as LIX63, D2EHPA, Cyanex471X, were also used to separate Zn and Ag from nitrate leachates of silver oxide batteries [10][11][12][13] . Compared with other metal separation/recovering methods, solvent extraction has an advantage on easy handing and high process efficiency 14,15) .…”

Section: Introductionmentioning

confidence: 99%

Separation of Ag and Zn from Nitrate Leachate of Spent Silver Oxide Batteries by Solvent Extraction with Cyanex272

Cho,

Seo,

Sun

2024

Resour. Recycl.

Self Cite

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The separation of Ag and Zn from the nitrate leachate of spent silver oxide batteries using Cyanex272 as an extractant was investigated. The extraction of Ag and Zn was affected by the concentrations of nitric acid and the extractant. Cyanex-272 selectively extracted Zn over Ag when the HNO 3 concentration was lower than 0.1 mol/L. The co-extracted Ag was removed by stripping with 1 mol/L thiourea. Stripping of Zn from the loaded Cyanex-272 was accomplished using 0.5 mol/L HNO 3 after the removal of Ag. The McCabe-Thiele diagrams for the extraction of Zn with Cyanex-272, the scrubbing tripping of Ag with thiourea, and the stripping of Zn with HNO 3 were constructed. The results were verified by simulated counter-current extraction and stripping experiments. Finally, a process for the separation of Ag and Zn from silver oxide batteries was proposed.

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Solvent Extraction Separation of Silver(I) and Zinc(II) from Nitrate Leach Solution of Spent Silver Oxide Batteries with D2EHPA

Cited by 8 publications

References 20 publications

2-Mercaptobenzimidazole derivative of chitosan for silver sorption – Contribution of magnetite incorporation and sonication effects on enhanced metal recovery

2-Mercaptobenzimidazole derivative of chitosan for silver sorption – Contribution of magnetite incorporation and sonication effects on enhanced metal recovery

Highly selective solvent extraction of Zn(II) and Cr(III) with trioctylmethylammonium chloride ionic liquid

Separation of Ag and Zn from Nitrate Leachate of Spent Silver Oxide Batteries by Solvent Extraction with Cyanex272

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