Selective recovery of Co(II) over Ni(II), Al(III), and Li(I) from ethylene glycol solution by solvent extraction and precipitation
Using “green solvents” like ethylene glycol (EG) to replace water in hydrometallurgical processes is increasingly popular because of its feasibility and environmental friendliness advantages. In this study, the selective recovery behavior of Co(II) over Ni(II), Al(III), and Li(I) from mixed EG and...
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Can Tho University Publisher
2025-03-01
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| Series: | CTU Journal of Innovation and Sustainable Development |
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| Online Access: | http://web2010.thanhtoan/index.php/ctujs/article/view/914 |
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| author | Viet Nhan Hoa Nguyen Quoc Vinh Ly Mong Nhu Y Huynh Van Hong Thien Doan Huynh Vu Thanh Luong Thi Hong Nguyen Man Seung Lee Thanh Tuan Tran |
| author_facet | Viet Nhan Hoa Nguyen Quoc Vinh Ly Mong Nhu Y Huynh Van Hong Thien Doan Huynh Vu Thanh Luong Thi Hong Nguyen Man Seung Lee Thanh Tuan Tran |
| author_sort | Viet Nhan Hoa Nguyen |
| collection | DOAJ |
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Using “green solvents” like ethylene glycol (EG) to replace water in hydrometallurgical processes is increasingly popular because of its feasibility and environmental friendliness advantages. In this study, the selective recovery behavior of Co(II) over Ni(II), Al(III), and Li(I) from mixed EG and H2O of HCl solution was studied by a combination of solvent extraction and stripping precipitation. The results showed that Co(II) from the EG-H2O solutions was selectively extracted over other metals by ionic liquids, in which ALi-SCN was more efficient than Aliquat 336. The presence of EG offered significant advantages in selectivity and efficiency for Co(II), whereas the effect of HCl concentration in the EG-H2O system was negligible. The selective extraction behavior of ALi-SCN for Co(II) is due to differences in the stability and speciation of metal complexes in the EG-H2O solution. Co(II) from the loaded ALi-SCN was directly precipitated to cobalt oxalate with above 99.9% purity under conditions: 60 min, O/A ratio of 1, and 1:2 of mole ratio of Co(II) to H2C2O4. ALi-SCN solutions after the Co(II) precipitation can be reused several times with selective Co(II) extraction capacity at high performance. Thus, Co(II) recovery from an EG-H2O system through continuous two steps of ALi-SCN extraction and precipitation is feasible.
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| format | Article |
| id | doaj-art-81285e366a0c4b26ac7798d33cfbe957 |
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| issn | 2588-1418 2815-6412 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Can Tho University Publisher |
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| series | CTU Journal of Innovation and Sustainable Development |
| spelling | doaj-art-81285e366a0c4b26ac7798d33cfbe9572025-08-20T02:34:39ZengCan Tho University PublisherCTU Journal of Innovation and Sustainable Development2588-14182815-64122025-03-01171Selective recovery of Co(II) over Ni(II), Al(III), and Li(I) from ethylene glycol solution by solvent extraction and precipitationViet Nhan Hoa Nguyen0Quoc Vinh LyMong Nhu Y HuynhVan Hong Thien DoanHuynh Vu Thanh LuongThi Hong NguyenMan Seung Lee1Thanh Tuan Tran2Faculty of chemical engineering, College of engineering, Can Tho University, VietnamDepartment of Advanced Materials Science & Engineering, Institute of Rare Metal, Mokpo National University, Chonnam 534-729, Republic of Koreaa:1:{s:5:"en_US";s:120:"Faculty of Chemical Engineering, Bio and Food Technology, Can Tho University of Technology, Can Tho City 900000, Vietnam";} Using “green solvents” like ethylene glycol (EG) to replace water in hydrometallurgical processes is increasingly popular because of its feasibility and environmental friendliness advantages. In this study, the selective recovery behavior of Co(II) over Ni(II), Al(III), and Li(I) from mixed EG and H2O of HCl solution was studied by a combination of solvent extraction and stripping precipitation. The results showed that Co(II) from the EG-H2O solutions was selectively extracted over other metals by ionic liquids, in which ALi-SCN was more efficient than Aliquat 336. The presence of EG offered significant advantages in selectivity and efficiency for Co(II), whereas the effect of HCl concentration in the EG-H2O system was negligible. The selective extraction behavior of ALi-SCN for Co(II) is due to differences in the stability and speciation of metal complexes in the EG-H2O solution. Co(II) from the loaded ALi-SCN was directly precipitated to cobalt oxalate with above 99.9% purity under conditions: 60 min, O/A ratio of 1, and 1:2 of mole ratio of Co(II) to H2C2O4. ALi-SCN solutions after the Co(II) precipitation can be reused several times with selective Co(II) extraction capacity at high performance. Thus, Co(II) recovery from an EG-H2O system through continuous two steps of ALi-SCN extraction and precipitation is feasible. http://web2010.thanhtoan/index.php/ctujs/article/view/914Cobaltethylene glycolgreen solventlithium batteriesprecipitation |
| spellingShingle | Viet Nhan Hoa Nguyen Quoc Vinh Ly Mong Nhu Y Huynh Van Hong Thien Doan Huynh Vu Thanh Luong Thi Hong Nguyen Man Seung Lee Thanh Tuan Tran Selective recovery of Co(II) over Ni(II), Al(III), and Li(I) from ethylene glycol solution by solvent extraction and precipitation CTU Journal of Innovation and Sustainable Development Cobalt ethylene glycol green solvent lithium batteries precipitation |
| title | Selective recovery of Co(II) over Ni(II), Al(III), and Li(I) from ethylene glycol solution by solvent extraction and precipitation |
| title_full | Selective recovery of Co(II) over Ni(II), Al(III), and Li(I) from ethylene glycol solution by solvent extraction and precipitation |
| title_fullStr | Selective recovery of Co(II) over Ni(II), Al(III), and Li(I) from ethylene glycol solution by solvent extraction and precipitation |
| title_full_unstemmed | Selective recovery of Co(II) over Ni(II), Al(III), and Li(I) from ethylene glycol solution by solvent extraction and precipitation |
| title_short | Selective recovery of Co(II) over Ni(II), Al(III), and Li(I) from ethylene glycol solution by solvent extraction and precipitation |
| title_sort | selective recovery of co ii over ni ii al iii and li i from ethylene glycol solution by solvent extraction and precipitation |
| topic | Cobalt ethylene glycol green solvent lithium batteries precipitation |
| url | http://web2010.thanhtoan/index.php/ctujs/article/view/914 |
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