Abstract
The work aims to study sorption properties of chitin-glucan (ChGC) and chitosan-glucan (CsGC) biopolymer complexes isolated from Aspergillus niger fungal mycelia biomass, a citric acid production waste. According to the obtained data, the sorption capacity of the diacetylated CsGC with primary amine groups is higher against Pb 2+ and Сu 2+ ions (130-140 mg/g) as compared with ChGC (50-80 mg/g). Langmuir and Freundlich equations govern adsorption isotherms with high correlation parameters (R 2 =0,998) and (Сu 2+ - R 2 =0,98, Pb 2+ - R 2 =0,95) correspondingly. X-ray structural analysis states the samples have a new phase of sorbed ions with functional groups. The study results show it is possible to obtain chitin-glucan and chitosan-glucan bio-complexes isolated from mycelia wastes with high sorption capacity and their application for copper, lead and other heavy metals ions removal has a great future.
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