Water-stable metal–organic frameworks (MOFs), which possess unique porous structures, have attracted attention from scientists exploring novel and efficient methods for the elimination of phenol compounds from aqueous media.
a b s t r ac tThe main goal of this work was to investigate a possible application of woody biomass fly ash (WBFA) as a low-cost sorbent for the removal of ionic, toxic and carcinogenic diazo dye (Congo red [CR]) from aqueous solutions. Biomass fly ash is a by-product generated during mixed wood biomass combustion in the 1 MW electric power facility in Udbina, Croatia. Batch sorption experiments were carried out to evaluate the influence of experimental parameters, such as initial dye concentration, contact time and temperature on the sorption process. The experimental data were analyzed using different isotherm and kinetic models. The best fit was achieved by the Langmuir isotherm equation (R 2 > 0.9904). Results of the kinetic studies showed that the CR dye sorption onto the WBFA was best described by the pseudosecond-order kinetic model. The Weber-Morris intraparticle diffusion model indicated that the intraparticle diffusion is not the rate-limiting step, while the Boyd model suggested that the film diffusion might be rate-limiting. The calculated thermodynamic parameters (ΔG°, ΔH° and ΔS°) showed that the sorption of CR is feasible, spontaneous and endothermic. Experimental results confirmed that the WBFA had the potential to be utilized as a low-cost sorbent material for the removal of CR dye from aqueous media.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.