Characterization and chromium biosorption potential of extruded polymeric substances from Synechococcus mundulus induced by acute dose of gamma irradiation

This study characterized the extruded polymeric substances (EPS) secreted from Synechococcus mundulus cultures under the effect of 2-KGy gamma irradiation dose. The EPS demonstrated seven monosaccharides, two uronic acids and several chemical functional groups: O–H, N–H, =C–H, C=C, C=O, COO–, O–SO 3...

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Bibliographic Details
Published in:Environmental science and pollution research international 2019-11, Vol.26 (31), p.31998-32012
Main Authors: Hussein, Mervat H., Hamouda, Ragaa A., Elhadary, Abdel Monsef A., Abuelmagd, Muhammad A., Ali, Shafaqat, Rizwan, Muhammad
Format: Article
Language:English
Subjects:
Adsorption
Aquatic Pollution
Atmospheric Protection/Air Quality Control/Air Pollution
Biosorption
Carbohydrates
Chromium
Chromium - chemistry
Degree of crystallinity
Earth and Environmental Science
Ecotoxicology
Environment
Environmental Chemistry
Environmental Health
Environmental science
Extrusion
Food irradiation
Functional groups
Gamma irradiation
Gamma rays
Irradiation
Monomers
Monosaccharides
Organic chemistry
Polymers - chemistry
Proteins
Radiation dosage
Research Article
Sulfur trioxide
Synechococcus
Synechococcus - radiation effects
Waste Water Technology
Water Management
Water Pollution Control
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Summary:This study characterized the extruded polymeric substances (EPS) secreted from Synechococcus mundulus cultures under the effect of 2-KGy gamma irradiation dose. The EPS demonstrated seven monosaccharides, two uronic acids and several chemical functional groups: O–H, N–H, =C–H, C=C, C=O, COO–, O–SO 3 , C–O–C and a newly formed peak at 1593 cm −1 (secondary imide). The roughness of EPS was 96.71 nm and only 28.4% total loss in weight was observed at 800 °C with a high degree of crystallinity quantified as CI DSC (0.722) and CI XRD (0.718). Preliminary comparative analyses of EPS exhibited high protein content in the radiologically modified (R-EPS) than control (C-EPS). Modified EPS were characterized with a high biosorption efficiency, which could be attributed to its high content of uronic acids, protein and sulphates as well as various saccharide monomers. Data revealed that 0.0213 mg L −1 h −1 is the maximum biosorption rate (SBR max ) of Cr(VI) for R-EPS, whereas 0.0204 mg L −1 h −1 SBR max for the C-EPS respectively.
ISSN:0944-1344
1614-7499
DOI:10.1007/s11356-019-06202-x