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Article

Studies on the Mechanism of Cu(II) Ion Sorption on Purolite S 940 and Purolite S 950

1
Analytical Laboratory, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie Skłodowska University, Maria Curie Skłodowska Sq. 2, 20-031 Lublin, Poland
2
Department of Inorganic Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie Skłodowska University, Maria Curie Skłodowska Sq. 2, 20-031 Lublin, Poland
3
Institute of Agrophysics PAS, Doświadczalna 4 Str., 20-290 Lublin, Poland
4
Department of Materials Engineering, Mechanical Engineering Faculty, Lublin University of Technology, Nadbystrzycka 36 Str., 20-618 Lublin, Poland
5
Biolive Innovation, B. Dobrzańskiego 3 Str., 20-262 Lublin, Poland
*
Author to whom correspondence should be addressed.
Academic Editors: Andrea Petrella and Antonio Gil Bravo
Materials 2021, 14(11), 2915; https://doi.org/10.3390/ma14112915
Received: 18 March 2021 / Revised: 26 May 2021 / Accepted: 27 May 2021 / Published: 28 May 2021
(This article belongs to the Special Issue Adsorbents and Their Applications)
The aim of the presented research was to investigate the mechanism of sorption of Cu(II) ions on the commercially available Purolite S 940 and Purolite S 950 chelating ion exchangers with the aminophosphonic functional groups. In order to understand better the sorption mechanism, the beads were cut with an ultramicrotome before and after the Cu(II) ion sorption process. The cut beads were examined by scanning electron microscopy (SEM) with an EDX detector. The performed linear profiles of the elemental composition allowed us to examine the depth with which the sorbed metal penetrates into. For further investigations concerning the mechanism of the sorption process, the Fourier transform infrared spectroscopy (FTIR) analysis using the attenuated total reflectance (ATR) technique and the X-ray photoelectron spectroscopy (XPS) methods have been used. The comparison of FTIR and XPS spectra before and after the sorption of Cu(II) ions showed that free electron pairs from nitrogen and oxygen in the aminophosphonic functional groups participate in the process of copper ion sorption. In addition, the microscopic studies suggested that the process of ion exchange between Na(I) ions and sorbed Cu(II) ions takes place on the Purolite S 940 and Purolite S 950. This study concerning the in-depth understanding the of Cu(II) sorption mechanism, using modern analytical tools and research methods could be very useful for its further modifications leading to the improvement of the process efficiency. View Full-Text
Keywords: heavy metals; sorption mechanism; ion exchangers; copper; Purolite S 940; Purolite S 950 heavy metals; sorption mechanism; ion exchangers; copper; Purolite S 940; Purolite S 950
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MDPI and ACS Style

Sofińska-Chmiel, W.; Kołodyńska, D.; Adamczuk, A.; Świetlicki, A.; Goliszek, M.; Smagieł, R. Studies on the Mechanism of Cu(II) Ion Sorption on Purolite S 940 and Purolite S 950. Materials 2021, 14, 2915. https://doi.org/10.3390/ma14112915

AMA Style

Sofińska-Chmiel W, Kołodyńska D, Adamczuk A, Świetlicki A, Goliszek M, Smagieł R. Studies on the Mechanism of Cu(II) Ion Sorption on Purolite S 940 and Purolite S 950. Materials. 2021; 14(11):2915. https://doi.org/10.3390/ma14112915

Chicago/Turabian Style

Sofińska-Chmiel, Weronika; Kołodyńska, Dorota; Adamczuk, Agnieszka; Świetlicki, Aleksander; Goliszek, Marta; Smagieł, Radosław. 2021. "Studies on the Mechanism of Cu(II) Ion Sorption on Purolite S 940 and Purolite S 950" Materials 14, no. 11: 2915. https://doi.org/10.3390/ma14112915

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