Chelating, film-forming, and coagulating ability of the chitosan-glucan complex from Aspergillus niger industrial wastes.
Waste mycelia of Aspergillus niger from a citric acid production plant are simply treated with boiling 30-40% NaOH aqueous solutions for 4-6 hr to obtain the insoluble chitosan-glucan complex whose infrared, ESR, and x-ray diffraction spectra are reported. A number of transition- and post-transition-metal ions are chelated and collected by chitosan-glucan with higher yields than by animal chitosan. Immediate flocculation occurs upon mixing chitosan-glucan dispersions with alginate and polymolybdate solutions. Membranes are also obtained from chitosan-glucan dispersions in acetic acid or in chloral and dimethyl formamide mixtures.
D001234:Aspergillus niger / Q000032:analysis*; D002614:Chelating Agents; D055598:Chemical Phenomena; D011232:Chemical Precipitation; D002627:Chemistry, Physical; D002686:Chitin / Q000031:analogs & derivatives*; D048271:Chitosan; D005936:Glucans / Q000302:isolation & purification / Q000494:pharmacology*; D007221:Industry; D008567:Membranes, Artificial; D011134:Polysaccharides / Q000302:isolation & purification / Q000494:pharmacology*; D014866:Waste Products
D002614:Chelating Agents; D005936:Glucans; D008567:Membranes, Artificial; D011134:Polysaccharides; D014866:Waste Products; D002686:Chitin; D048271:Chitosan