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Chakraborty, R., Woo, H., Dehal, P., Walker, R., Zemla, M., Auer, M., and Hazen, T. C. 2017. Complete genome sequence of Pseudomonas stutzeri strain RCH2 isolated from a Hexavalent Chromium [Cr (VI)] contaminated site. Standards in Genomic Sciences, 12 (1): 23.‏

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Article

Effect of Potassium Dichromate on Properties and Biodegradation of Gum Arabic Based Bioplastic Membranes

1Department of Arid Land Agriculture, Faculty of Meteorology, Environment and Arid Land Agriculture, King Abdulaziz University, P.O. Box 80208, Jeddah-21589, Saudi Arabia

2Department of Microbiology, Faculty of Science, King Abdulaziz University

3Department of Physics, University of Jeddah, Saudi Arabia

4Department of Physics, Faculty of Science, Al-Faisaliah Campus, King Abdulaziz University


Nanoscience and Nanotechnology Research. 2017, Vol. 4 No. 2, 49-58
DOI: 10.12691/nnr-4-2-3
Copyright © 2017 Science and Education Publishing

Cite this paper:
Sherif S. Z. Hindi, Mona O. Albureikan, Attieh A. Al-Ghamdi, Haya Alhummiany, Sana M. Al-Sharabi. Effect of Potassium Dichromate on Properties and Biodegradation of Gum Arabic Based Bioplastic Membranes. Nanoscience and Nanotechnology Research. 2017; 4(2):49-58. doi: 10.12691/nnr-4-2-3.

Correspondence to: Sherif S. Z. Hindi, Department of Arid Land Agriculture, Faculty of Meteorology, Environment and Arid Land Agriculture, King Abdulaziz University, P.O. Box 80208, Jeddah-21589, Saudi Arabia. Email: shindi@kau.edu.sa

Abstract

Gum Arabic (GA) collected from Acacia senegal trees was used with polyvinyl alcohol (PVA) to prepare of a series of biodegradable membranes doped and non-doped with potassium dichromate (K2Cr2O7). Adding the K2Cr2O7 to the GA/PVA blends slightly decreased their crystallinity index (CI) by about 2 %. Increasing the PVA concentration in the chromated GA/PVA blends was responsible for increasing the CI. Adding the K2Cr2O7 to the pure GA solution modified its differential thermal behavior whereby the exothermic reactions occurred between 321°C and 433°C were disappeared. The K2Cr2O7 increased the heat change drastically for all the bioplastic blends with the highest increase for the pure GA. Adding K2Cr2O7 to the pure PVA increased the nanometric particle size (NPS) significantly. Increasing the PVA concentration in a blend had a greater effect than did the K2Cr2O7 on the NPS. The buried bioplastic membranes in the control soil had different count and species of microbial communities. The numbers of bacteria and fungi in the initial soil sample were lower than those for chromated GA membranes and were greater than those for the chromated PVA. All bacterial and fungi species had growth ability and are expected to be detoxification tools of chromium ion-doped blends of GA and PVA leading to a green environment.

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