초록
<P><B>ABSTRACT</B></P><P>Fed‐batch fermentation was used for biomass and fungal chitosan production by <I>Aspergillus terreus</I> (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 <I>A. terreus;</I> this implied that it was feasible to produce chitosan from industrial waste mycelia. Fungal chitosan derived from <I>A. terreus</I> 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 <I>A. terreus</I> 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 <I>A. terreus</I>. Fungal chitosan is an easy and cost‐effective material for the abatement of pollution. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. <B>2014</B>, <I>131</I>, 40436.</P>