A demethylated series oxidation modified lignin-based cationic organic dye adsorbent and a preparation method and application thereof

Abstract

This invention provides a demethylated tandem oxidation-modified lignin-based cationic organic dye adsorbent, its preparation method, and its applications. Using industrial lignin as raw material, a large number of oxygen-containing functional groups are successfully constructed through demethylation tandem oxidation modification, enhancing the affinity and adsorption capacity of lignin for cationic organic dyes. This modified lignin adsorbent is suitable for various cationic dyes, including anionic malachite green, rhodamine B, and Victoria Blue B, exhibiting excellent adsorption performance. The preparation process is simple, the reaction conditions are mild, and it can achieve efficient removal of different dyes. The raw materials for this adsorbent are widely available and inexpensive, possessing good biocompatibility and environmental friendliness, and can be widely applied in the field of dyeing and printing wastewater treatment, demonstrating significant practical application and promotion value.

Images