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- W2890166831 abstract "Abstract The structural investigation and the chromium adsorptive potential of an exopolysaccharide (EPS) released during the growth of an indigenous cyanobacterium, Oscillatoria trichoides Szafer, were investigated in a laboratory‐scale study. The results showed that, of the total EPS produced, 410.53 milligrams/gram (mg g −1 ) were released polysaccharides (RPS) and 11.36 mg g −1 were capsular polysaccharides (CPS). The sorption of hexavalent chromium (Cr 6+ ) by the RPS achieved a maximum amount of metal removal ( q max ) value of 76.92 mg g −1 of polysaccharide dry weight. The highest coefficient of determination (0.9742) for the Langmuir adsorption model indicates best fitness of the model in explaining the sorption as a unilayer process. Equilibrium studies indicated that 30 to 40 milligrams per liter initial chromium concentration and a pH of 2 were optimal for biosorption of chromium by the RPS. Scanning electron microscopy with energy‐dispersive X‐ray spectroscopy analysis of Cr 6+ ‐treated RPS showed the presence of 3.76% bound chromium. Compositional analysis of the EPS showed the presence of carbohydrates, proteins, pyruvic acid, and hexosamines. High‐performance liquid chromatography analysis demonstrated the presence of hexoses, as neutral sugars and glucuronic acid as an acidic sugar. The presence of carboxylic groups was also detected by infrared spectroscopy. The presence of these chemical constituents may serve as binding sites for the metal ions; therefore, the RPS of this species appears to be a promising biosorbent for Cr 6+ ." @default.
- W2890166831 created "2018-09-27" @default.
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- W2890166831 date "2018-09-01" @default.
- W2890166831 modified "2023-10-01" @default.
- W2890166831 title "Partial characterization of the exopolysaccharide from<i>Oscillatoria trichoides</i>Szafer and the role of released polysaccharide in sequestration of Cr<sup>6+</sup>" @default.
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- W2890166831 doi "https://doi.org/10.1002/rem.21576" @default.
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