Sorption of Heavy Metal Ions by the “Cellulose–Carbon Nanotubes” Biocomposite

IF 1.1 4区材料科学 Q3 METALLURGY & METALLURGICAL ENGINEERING

Protection of Metals and Physical Chemistry of Surfaces Pub Date : 2025-02-18 DOI:10.1134/S2070205124702125

T. E. Nikiforova, D. A. Vokurova

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Abstract

This paper presents the development of a composite sorbent based on cellulose and carbon nanotubes and its sorption properties towards Cu(II) ions. Carbon nanotubes were sequentially modified with concentrated sulfuric acid, thionyl chloride, and ethylenediamine, and subsequently attached to cellulose pretreated with citric acid. The formation of new functional groups on the surface of the composite cellulose sorbent was confirmed through FTIR spectroscopy. Scanning electron microscopy revealed differences in the surface structure of cellulose-based sorbents before and after modification. The kinetics and equilibrium of Cu(II) ion sorption were investigated in a heterogeneous “aqueous solution–modified sorbent” system. The kinetic data were more accurately described using the pseudo-second-order kinetic model. Analysis of sorption isotherms using the Langmuir equation allowed determination of the maximum sorption capacity of the original sorbent and its composite derivative. It was found that the sorption capacity of the composite sorbent is approximately six times greater than that of unmodified cellulose.

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来源期刊

Protection of Metals and Physical Chemistry of Surfaces 工程技术-冶金工程

CiteScore

1.90

自引率

18.20%

发文量

审稿时长

4-8 weeks

期刊介绍： Protection of Metals and Physical Chemistry of Surfaces is an international peer reviewed journal that publishes articles covering all aspects of the physical chemistry of materials and interfaces in various environments. The journal covers all related problems of modern physical chemistry and materials science, including: physicochemical processes at interfaces; adsorption phenomena; complexing from molecular and supramolecular structures at the interfaces to new substances, materials and coatings; nanoscale and nanostructured materials and coatings, composed and dispersed materials; physicochemical problems of corrosion, degradation and protection; investigation methods for surface and interface systems, processes, structures, materials and coatings. No principe restrictions exist related systems, types of processes, methods of control and study. The journal welcomes conceptual, theoretical, experimental, methodological, instrumental, environmental, and all other possible studies.