Sustainable cost-effective chemically modified banana leaf powder for methyl blue dye removal: kinetics, isotherm, thermodynamics and artificial intelligence-based analysis

Abstract

This study investigates cellulose-based adsorbents that are naturally occurring and have a unique, abundant supply for adsorbing organic dye. The effectiveness of chemically modified banana leaf powder (CMBLP) as a biodegradable and environmentally friendly adsorbent for extracting methyl blue (MB) dye from aqueous solutions was studied. Point-zero charge (pHpzc) analysis, scanning electron microscopy (SEM), X-ray energy dispersion (EDS), and Fourier transform infrared spectroscopy (FTIR) were used to characterize the CMBLP. At pH 6.0, 100 mg/L of dye, 50 min of contact time, and 300 K temperature, the maximum removal values were obtained. Under ideal circumstances, CMBLP displays 77.13215% removal rate. Langmuir and Freundlich models, along with pseudo-first- and pseudo-second-order kinetics equations, were used to investigate the equilibrium isotherm and kinetics of CMBLP. The acquired experimental data fit pseudo-second-order kinetics (R2 = 0.9986 and 0.9984) and the Langmuir isotherm (R2 = 0.9996) better. Utilizing the Langmuir isotherm model, the maximum adsorption capacity (qmax) of CMBLP has been identified to be 118.24 mg/g. At a temperature of 300 K, the adsorbent was also able to adsorb the maximum amount of methyl blue (MB). The thermal properties of methyl blue (MB) dye adsorption validate the spontaneous and exothermic nature of the adsorption process. The majority of statistical and artificial intelligence-based model (like KNN, SVM, ANN and LSTM) validate the superiority of MB removal onto CMBLP and support our experimental findings.