Ecofriendly and low-cost bio adsorbent for efficient removal of methylene blue from aqueous solution

Abstract

A novel bio adsorbent was fabricated from turmeric, polyvinyl alcohol and carboxymethyl cellulose for MB dye removal. The physicochemical, antibacterial and biodegradable nature of the flm was evaluated using scanning electron microscopy, optical microscopy, universal testing machine, water contact angle, thermogravimetric analysis, Fourier transform infrared spectroscopy, X-ray difraction, agar disc difusion method and soil degradability. The inclusion of turmeric into PVA/ CMC flm improves the biodegradability, antibacterial activity and thermomechanical property of the flms. PVA/CMC/TUR flm displayed good MB adsorption capacity (qe: 6.27 mg/g) and maximum dye adsorption (R%; 83%) and was achieved at initial dye concentration of 10 mg/L with contact time 170 min at room temperature. The adsorption data of MB on PVA/CMC/TUR flm was evaluated using four models Langmuir, Freundlich, Temkin and D-R isotherms. The diferent kinetic of adsorption (pseudo-frst order, pseudo-second order and intraparticle difusion model) was also applied for adsorption of MB on the flms. The experimental result suggests that PVA/CMC/TUR flms are an alternate cheap adsorbent for water treatment.