Isotherm and kinetic studies for the adsorption of methylene blue onto a novel Mn3O4-Bi2O3 composite and their antifungal performance

Metal oxide-based adsorbents are quite in for wastewater treatment because of their selectivity, stable structure and very low solubility aqueous systems. To explore the adsorption methylene blue (MB), Mn 3 O 4 -Bi 2 were made using a wet-impregnation technique with various concentrations . The presence contents on surface monoclinic Bi was confirmed through representative scanning electron micrographs. diffractions pertaining to cubic noticed XRD pattern 5% which confirm composite nature adsorbent. XPS analysis revealed existance 4f, 4d, 4p, Bi4s, 2p core levels study divulged highest efficiency (∼95% qe = ∼1.4 mgg -1 ) among other contestants removing 30 ppm MB at 28 ° C, pH 7 250 rpm. In addition determination ability, effect preliminary dye concentration (5, 10, 20, ppm) contact time (0.5–6 h) removal prepared also monitored. data from batch experiments evaluated Langmuir, Freundlich, Temkin, Dubinin-Radushkevich-Kaganer (DRK) isotherms pseudo 1 st nd -order kinetic models. fitting models formation adsorbate’s monolayer process chemisorption. Through FTIR measurement, onto effective adsorbent (5% confirmed. Moreover, TGA showed ∼1.5% weight loss by before whereas ∼2.6% after antifungal activity against fungi A. solani M. fructicola agar well diffusion technique. composites have exceptional characteristics compared , zone inhibition values 58.6 53.9 mm, respectively.