Heavy Metal Ions(II) Sorption by a Cellulose-Based Sorbent Containing Sulfogroups

This article concerns the effect of the chemical modification of short flax fiber on its sorption properties for heavy metal ions. The main purpose of the modification was to achieve the oxidation of flax cellulose with sodium metaperiodate to form dialdehyde cellulose. Additionally, the research shows the subsequent interaction of dialdehyde cellulose with 1-amino-8-hydroxynaphthalene-3,6-disulfonic acid and its transformation into a derivative capable of forming chelate complexes with heavy metal ions. Additionally, this article presents the results of equilibrium and kinetics studies of the sorption of Cu(II), Cd(II), and Fe(II) ions from aqueous solutions by primary and modified cellulose sorbents. SEM spectra indicate changes in the surface structure of the modified sorbents compared to the original one. IR spectra show the appearance of amino- and sulfogroups in short flax fibers in the process of their modification. The research revealed the efficiency of the method and the possibility of its use for the purification of aqueous solutions from heavy metal ions in industrial processes.

Automated summary

This article investigates the effect of chemical modification on the sorption properties of short flax fiber for heavy metal ions. The study shows that dialdehyde cellulose derived from the oxidation of flax cellulose can interact with 1-amino-8-hydroxynaphthalene-3,6-disulfonic acid and form chelate complexes with heavy metal ions. The research also reveals changes in surface structure and the presence of amino- and sulfogroups in the modified sorbents.