Waste-derived-lignin based hydrogel as a reusable adsorbent for efficient removal of dyes from aqueous solution

RSC Advances 2026 Open access

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Authors: Umme Toufika Jannat, Md. Anamul Haque, Sharuk Alam Aumi, Swapan Kumer Ray, Mohammad Moniruzzaman, S. A. Jahan, Md. Aftab Ali Shaikh, M. Q. Ehsan
DOI: 10.1039/d6ra01545j
Cited by: 3
References: 68

Abstract

for RhB. Isotherm analysis justified that adsorption followed the Freundlich isotherm model, suggesting multilayer adsorption on a heterogeneous surface, while kinetic studies revealed a pseudo-second-order nature. Thermodynamic analysis confirmed that the adsorption process is spontaneous and endothermic. The adsorption mechanism is governed by a combination of electrostatic interactions, hydrogen bonding, and π-π interactions. The hydrogel also demonstrated worthy reusability, maintaining performance over five adsorption-desorption cycles. Therefore, the lignin/PVA hydrogel could be a cost-effective, sustainable, and reusable adsorbent for dye removal from wastewater.

Fields of Study & Subjects

Adsorption and biosorption for pollutant removal Lignin and Wood Chemistry Advanced Cellulose Research Studies

Publication details

Journal / source
RSC Advances
Publisher
Royal Society of Chemistry (RSC)
Volume
16
Issue
28
Pages
25596–25613
Publication date
1 January 2026
Language
EN