Synthesis, Structure and Adsorption Properties of Carbon Composites Based on Lignin and Iron Powder

Abstract:

This study presents the synthesis of carbon composites based on iron powder and hydrolysis lignin, both with and without the addition of oleic acid. The synthesized composites were characterized using X-ray diffraction, gas adsorption-desorption porosimetry, and magnetometry. In addition, the adsorption performance of the composites toward methylene blue and congo red dyes from aqueous solutions was investigated. It was found that the addition of oleic acid does not significantly alter the structural or magnetic properties of the synthesized composite. However, it does affect the composition of oxygen-containing surface groups on the carbon. Analysis of the adsorption isotherms revealed that the carbon composite synthesized with oleic acid is nearly equally effective in adsorbing both methylene blue and congo red dyes. Isotherm modeling demonstrated that the synthesized composites adsorb both dyes via a physisorption mechanism.

• Periodical: Key Engineering Materials (Volume 1027)
• Pages: 101-114
• DOI: https://doi.org/10.4028/p-6iF80n
• Online since: October 2025
• Authors: Ihor Bordun*, Myroslav Malovanyy, Nazar Nahurskyi, Anatoliy Borysiuk
• Keywords: Carbon Composite, Dye Adsorption, Iron Powder, Porous Structure, Specific Magnetisation, X-Ray Diffraction

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