Sodium iodide modified-red mud for efficient adsorptive removal of methylene blue from wastewater: isotherm modeling and adsorption.

ABSTRACT: The discharge of synthetic dyes and the improper disposal of industrial red mud (RM) pose serious environmental challenges worldwide. This study introduces an innovative adsorbent, RMI, synthesized by functionalizing raw red mud with sodium iodide (NaI) to remove methylene blue (MB) from aqueous solutions effectively. Comprehensive characterization using XRD, TG, DTG, SEM, and BET analysis confirmed the enhanced structural and surface properties of the RMI composites. Batch adsorption experiments revealed that RMI-5 achieved a maximum MB removal capacity of 245.2 mg g^-1 under optimal conditions. The adsorption process followed pseudo-second-order kinetics (R ² = 0.99), suggesting that chemisorption is the dominant mechanism, while the Langmuir isotherm model be

SUBMITTER: Sarfraz M 

PROVIDER: S-EPMC12550888 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature