Solid state fermentation of rice straw using Penicillium citrinum for chitosan production and application as nanobiosorbent. (June 2022)

• Record Type: Journal Article
• Authors: Namboodiri, M.M. Tejas; Paul, Tanushree; Medisetti, Raj Mohan Naidu; Pakshirajan, Kannan; Narayanasamy, Selvaraju; Pugazhenthi, G.
• Is Part Of: Bioresource technology reports. Volume 18(2022)
• Publication Date: 2022-06
• Subjects: Chitosan production -- Solid-state fermentation -- Nanobiosorbents -- Penicillium citrinum -- Heavy metal removal; Biomass energy -- Periodicals; Biotransformation (Metabolism) -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Waste products as fuel -- Periodicals; Waste products as fuel; Organic wastes; Factory and trade waste; Biotransformation (Metabolism); Biomass energy; Agricultural wastes; Periodicals; Electronic journals; 662.88
• DOI: 10.1016/j.biteb.2022.101005
• Languages: English
• ISSNs: 2589-014X

Abstract

Abstract: Chitosan production by Penicillium citrinum using rice straw was investigated by varying the moisture content (50–80%) and particle size of rice straw, and their optimum levels were found to be 70% and 4–5 mm, respectively. A lab scale tray fermenter was later employed to carry out the solid-state fermentation which yielded a maximum chitosan production of 9 g/kg of rice straw. Nanobiosorbents based on the fungal chitosan produced in this study was further prepared and evaluated for heavy metal removal. Magnetic iron (Fe3 O4 ) nanoparticles coated with chitosan and carboxymethyl chitosan (CMC) were used as the nano-biosorbents to remove Cr(VI) and Pb(II) from corresponding aqueous solutions. Maximum removal of Cr (VI) and Pb (II) were 42.43 and 178.2 mg/g with CMCNPs. Heavy metal removal kinetics by the nanobiosorbents followed the pseudo-second order kinetics. Furthermore, the nanobiosorbents were found suitable for reuse for up to three cycles of sorption-desorption. Graphical abstract: Unlabelled Image Highlights: Chitosan production by solid state fermentation of rice straw is reported. Microwave-alkali pretreatment of rice straw is found to be effective. Maximum chitosan titre of 9 g/kg is achieved using a tray fermenter. Chitosan based nanobiosorbents showed very high removal of Cr(VI) and Pb(II). The nanobiosorbents could be reused for heavy metal adsorption up to 3 cycles.