Efficiency of Adsorbents Containing Various Carbon Allotropes, Including Modified Carbon Nanotubes

The adsorption of toxic ions Be(II), Bi(III), Cd(II), Cr(III), and Pb(II), and also noble metals Ag(I), Au(III), and Pd(II), from aqueous solutions is studied using carbon nanotubes (CNTs), a magnetic nanosorbent composed of CNTs and magnetic nanoparticles (CNT@MNP), and activated carbon (AC). An ad...

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Bibliographic Details
Published in:Journal of analytical chemistry (New York, N.Y.) N.Y.), 2024-10, Vol.79 (10), p.1399-1407
Main Authors: Grazhulene, S. S., Zolotareva, N. I., Hodos, I. I.
Format: Article
Language:English
Subjects:
Activated carbon
Adsorbents
Adsorption
Allotropy
Analytical Chemistry
Aqueous solutions
Carbon
Carbon nanotubes
Chemical synthesis
Chemistry
Chemistry and Materials Science
Cobalt
Cost effectiveness
Gold
Iron
Lead
Liquid phases
Noble metals
Palladium
Solid phases
Subgroups
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Summary:The adsorption of toxic ions Be(II), Bi(III), Cd(II), Cr(III), and Pb(II), and also noble metals Ag(I), Au(III), and Pd(II), from aqueous solutions is studied using carbon nanotubes (CNTs), a magnetic nanosorbent composed of CNTs and magnetic nanoparticles (CNT@MNP), and activated carbon (AC). An advantage of CNT-based adsorbents over AC in terms of capacity was demonstrated, with an increase of approximately 1.5–2 times. The adsorption capacity of the synthesized magnetic adsorbent depends on the morphology of CNTs grown on iron subgroup catalysts: nickel (CNT(Ni)), cobalt (CNT(Co)), and iron (CNT(Fe)). CNT@MNP exhibited superior performance over other carbon adsorbents in magnetic solid-phase extraction, effectively separating solid and liquid phases. Additionally, composite adsorbents containing CNT(Co) and CNT(Fe) were noted for their cost-effectiveness, as they yielded satisfactory results, surpassed those obtained with the individual CNT-based adsorbents. Procedures were developed using these carbon adsorbents and their performance in the determination of elements in aqueous solutions by arc atomic emission spectrometry was estimated.
ISSN:1061-9348
1608-3199
DOI:10.1134/S106193482470076X