Advancing eco-friendly adsorption: a sustainable approach for rapid and efficient methylene blue removal
Aslı Erdem Yayayürük, Nevin Çankaya, Onur Yayayürük
Abstract
Abstract Synthetic dyes, particularly methylene blue (MB), pose significant environmental challenges due to their persistent presence in water bodies. This study introduces a sustainable polymer adsorbent, poly(LIM- co -DVB- co -AcM), synthesized using d -limonene and 4-acryloylmorpholine. Comprehensive characterization using FTIR, SEM, TGA, and BET analysis revealed its thermal stability, surface morphology, and adsorption properties. Adsorption experiments demonstrated optimal MB removal at pH 7.0 with a 20 mg dosage and a 60-min contact time. The Langmuir isotherm model showed monolayer adsorption with a capacity of 54.2 mg g −1 , while kinetic studies confirmed the suitability of the pseudo-second-order model. Thermodynamic analysis indicated a spontaneous and exothermic process. The polymer achieved over 99% MB removal efficiency across diverse water matrices, highlighting its potential as a scalable and eco-friendly solution for water purification.