Low-cost Bio-Adsorbent Based on Amorphous Carbon Thin Film/ Chitosan Composite for Removal of Methylene Blue Dye from Aqueous Solutions: Kinetic and isotherm

Abstract

IN this article, we focused on using low-cost bio-adsorbents such as chitosan from shrimp & crabs shells waste, and amorphous carbon thin film ACTF from microcrystalline cellulose waste, to prepare a new composite (ACTF/C) for removal of methylene blue (MB) dye from aqueous solution. ACTF/C composite was prepared via a novel ultrasonic co-precipitation method instead of traditional chemical vapor deposition (CVD) method. The morphological and structural descriptions are performed using XRD, FTIR, TEM, TGA, SAED and SEM analysis. The analysis results showed that the ACTF/C composite was prepared successfully. The effects of several parameters such as adsorbent doses (0.05–0.2 g/100 ml), temperatures (25–45 oC), initial solution pH of solution (3–9), dye concentrations (10,25, 50, and 100 ppm) and contact time (20-80 min) on the adsorption process were examined. The kinetics, thermodynamic analyses, and adsorption isotherm models were examined to estimates the empirical results. The empirical facts are properly equipped with the Langmuir isotherm (R2 = 0.997), giving an absorption capacity of more than 85mg/g. From kinetic details, we found that adsorption of methylene blue day across ACTF/C composite is represented by the pseudo-second-order model. In general, these outcomes suggest that the new ACTF/C composite provides great potential to get rid of methylene blue dye from contaminated water.