Production and isolation of chitosan from Aspergillus terreus and application in tin(II) adsorption

Abstract

Fed‐batch fermentation was used for biomass and fungal chitosan production by Aspergillus terreus (BCRC 32068) grown in a potato dextrose agar medium. The polysaccharides were extracted by an alkali–acid treatment, and structural investigations by X‐ray diffraction, Fourier transform infrared analysis, and viscosity and thermal analysis were done. A high level of chitosan was extracted from A. terreus; this implied that it was feasible to produce chitosan from industrial waste mycelia. Fungal chitosan derived from A. terreus showed the highest adsorption capacity for Sn(II). The order of Sn(II) adsorption capacity for these chitosanaceous materials was Fungal chitosan > Chitin > Biomass. Fungal chitosan derived from A. terreus was well correlated with Langmuir's isotherm model. The maximum capacity for Sn(II) sorption deduced from the use of the Langmuir isotherm equation was 303 mg/g; this was significantly higher than that of A. terreus. Fungal chitosan is an easy and cost‐effective material for the abatement of pollution. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40436.

ANTIFUNGAL ACTIVITY OF CHITOSAN AGAINST Rhizopus stolonifer

“…The current study established the biocidal potential of chitosan against R. stolonifer and reported that the application of this natural fungicide can enhance the shelf life of tomato fruits. Due to its non-toxicity, biodergardable, and organic nature chitosan derivatives have been successfully used for the management of fungal diseases and enhancing fruit self-life (Cheng et al, 2014).…”

Innovative chitin-glucan based material obtained from mycelium of wood decay fungal strains

“…In recent years, fungi have been deeply investigated for industrial applications as bio-based materials [ [14] , [15] , [16] ]. The extraction of chitin from non-animal sources as fungi is possible [ [17] , [18] , [19] ] and it can be particularly attractive because it has no impact on animals [ 20 ]. Few cultivated edible species of fungi were already tested as chitin sources, with the aim of recycling waste parts.…”

Innovative Chitin-Glucan Based Material Obtained from Mycelium of Wood Decay Fungal Strains

“…In recent years, fungi have been deeply investigated for industrial applications as bio-based materials [14][15][16]. The extraction of chitin from non-animal sources as fungi is possible [17][18][19] and it can be particularly attractive because it has no impact on animals [20]. Few cultivated edible species of fungi were already tested as chitin sources, with the aim of recycling waste parts.…”