TEMPO-oxidized cellulose beads for cationic dye adsorption

Toxic organic dyes present in wastewater should be removed before discharge. In this study, TEMPO-oxidized, regenerated cellulose beads were prepared using a simple falling ball technique for cationic methylene blue (MB) removal. The obtained characterized various analytical techniques. results indicated that TEMPO-oxidized displayed porous structures with high content of carboxylic acid groups. Thus, the negatively charged can effectively adsorb MB an adsorption capacity 495 mg/g at starting concentration 100 mg/L. This one-step process achieved near-complete removal pH 7, indicating strong electrostatic interactions between and oxidized beads. experimental data well described by Langmuir isotherm model Pseudo-second-order model. fabricated exhibit great potential practical application dye from wastewater.