A mechanism study of methylene blue adsorption on seaweed biomass derived carbon: From macroscopic to microscopic scale

Biomass based active adsorbent can be prepared by activation process to adsorb dyes. In this study, using macroalgae as raw material, the biomass activated carbon material was NaOH method methylene blue. The with high specific surface area (1238.491 m2 g?1) characterized BET, XRD, FTIR and XPS. effects of impregnation ratio, amount adsorbent, pH contact time on adsorption activity biochar MB were evaluated. kinetics, molecular dynamics density functional theory discussed. maximum removal efficiency SWAC reached 98.56 % at 30 °C = 5 which is due its large mesoporous slit structure. MD simulation shows that molecules adsorbed layer through face-to-face stacking. DFT calculation subsequent electron structure analysis suggested a synergistic effect ?-? stacking, cation-? interaction, electrostatic interaction could help stabilize molecules. And an excellent capacity graphitic N sites for electronegativity.