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Article

The Application of 2,6-Bis(4-Methoxybenzoyl)-Diaminopyridine in Solvent Extraction and Polymer Membrane Separation for the Recovery of Au(III), Ag(I), Pd(II) and Pt(II) Ions from Aqueous Solutions

1
Faculty of Chemical Technology and Engineering, UTP University of Science and Technology, 3 Seminaryjna Street, PL 85326 Bydgoszcz, Poland
2
Faculty of Chemistry, Adam Mickiewicz University in Poznań, 8 Uniwersytetu Poznańskiego Street, PL 61712 Poznań, Poland
3
Faculty of Chemistry, Nicolaus Copernicus University in Toruń, 7 Gagarin Street, PL 87100 Toruń, Poland
*
Author to whom correspondence should be addressed.
Academic Editors: Inmaculada Aranaz Corral and Florentina Niuris Acosta Contreras
Int. J. Mol. Sci. 2021, 22(17), 9123; https://doi.org/10.3390/ijms22179123
Received: 27 July 2021 / Revised: 17 August 2021 / Accepted: 19 August 2021 / Published: 24 August 2021
The work describes the results of the first application of 2,6-bis(4-methoxybenzoyl)-diaminopyridine (L) for the recovery of noble metal ions (Au(III), Ag(I), Pd(II), Pt(II)) from aqueous solutions using two different separation processes: dynamic (classic solvent extraction) and static (polymer membranes). The stability constants of the complexes formed by the L with noble metal ions were determined using the spectrophotometry method. The results of the performed experiments clearly show that 2,6-bis(4-methoxybenzoyl)-diaminopyridine is an excellent extractant, as the recovery was over 99% for all studied noble metal ions. The efficiency of 2,6-bis(4-methoxybenzoyl)-diaminopyridine as a carrier in polymer membranes after 24 h of sorption was lower; the percentage of metal ions removal from the solutions (%Rs) decreased in following order: Ag(I) (94.89%) > Au(III) (63.46%) > Pt(II) (38.99%) > Pd(II) (23.82%). The results of the desorption processes carried out showed that the highest percentage of recovery was observed for gold and silver ions (over 96%) after 48 h. The results presented in this study indicate the potential practical applicability of 2,6-bis(4-methoxybenzoyl)-diaminopyridine in the solvent extraction and polymer membrane separation of noble metal ions from aqueous solutions (e.g., obtained as a result of WEEE leaching or industrial wastewater). View Full-Text
Keywords: polymer membranes; solvent extraction; recovery of noble metal ions; 2,6-bis(4-methoxybenzoyl)-diaminopyridine; spectrophotometry polymer membranes; solvent extraction; recovery of noble metal ions; 2,6-bis(4-methoxybenzoyl)-diaminopyridine; spectrophotometry
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MDPI and ACS Style

Bożejewicz, D.; Witt, K.; Kaczorowska, M.A.; Urbaniak, W.; Ośmiałowski, B. The Application of 2,6-Bis(4-Methoxybenzoyl)-Diaminopyridine in Solvent Extraction and Polymer Membrane Separation for the Recovery of Au(III), Ag(I), Pd(II) and Pt(II) Ions from Aqueous Solutions. Int. J. Mol. Sci. 2021, 22, 9123. https://doi.org/10.3390/ijms22179123

AMA Style

Bożejewicz D, Witt K, Kaczorowska MA, Urbaniak W, Ośmiałowski B. The Application of 2,6-Bis(4-Methoxybenzoyl)-Diaminopyridine in Solvent Extraction and Polymer Membrane Separation for the Recovery of Au(III), Ag(I), Pd(II) and Pt(II) Ions from Aqueous Solutions. International Journal of Molecular Sciences. 2021; 22(17):9123. https://doi.org/10.3390/ijms22179123

Chicago/Turabian Style

Bożejewicz, Daria, Katarzyna Witt, Małgorzata A. Kaczorowska, Włodzimierz Urbaniak, and Borys Ośmiałowski. 2021. "The Application of 2,6-Bis(4-Methoxybenzoyl)-Diaminopyridine in Solvent Extraction and Polymer Membrane Separation for the Recovery of Au(III), Ag(I), Pd(II) and Pt(II) Ions from Aqueous Solutions" International Journal of Molecular Sciences 22, no. 17: 9123. https://doi.org/10.3390/ijms22179123

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