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2 results on '"Fahmida Parvin"'

1. Cyanobacteria mediated heavy metal removal: a review on mechanism, biosynthesis, and removal capability

Author

Joydeep Chakraborty, Fahmida Parvin, Yong Ick Kim, and Abdullah Al-Amin

Subjects
Cyanobacteria, Environmental Engineering, biology, Chemistry, Mechanism (biology), biology.organism_classification, Pollution, Metal, Human health, chemistry.chemical_compound, Bioremediation, Biosynthesis, Wastewater, visual_art, Bioaccumulation, Environmental chemistry, visual_art.visual_art_medium, Waste Management and Disposal, Water Science and Technology
Abstract

Heavy metal in wastewater is a crucial concern due to its toxicological manifestations on human health, particularly in developing countries. Compared to different conventional heavy metal removal ...

Published
2021
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2. Preparation and Characterization of Gelatin-Based PVA Film: Effect of Gamma Irradiation

Author

M. Masud Billah, Kamol Dey, Nusrat Sharmin, Asmj Chowdhury, Sushanta Ghoshal, Mubarak A. Khan, Shamsun Nahar, Mushfiqur Rahman, Fahmida Parvin, Ruhul A. Khan, Bapi Sarker, and Haydar U. Zaman

Subjects
Thermogravimetric analysis, Materials science, food.ingredient, Aqueous solution, Polymers and Plastics, General Chemical Engineering, Gelatin, Polyvinyl alcohol, Analytical Chemistry, chemistry.chemical_compound, food, Monomer, chemistry, Polymer chemistry, Ultimate tensile strength, Methanol, Irradiation, Nuclear chemistry
Abstract

Gelatin-based polyvinyl alcohol (PVA) films were prepared (using a casting process) by mixing aqueous solutions of gelatin and PVA in different ratios. Monomer 1, 4-butanediol diacrylate (BDDA) was dissolved in methanol. Films containing 95% gelatin + 5% PVA were soaked in 3% BDDA monomer (w/w). These films were then irradiated under gamma radiation (60Co) at different doses (50–500 krad) at a dose rate of 350 krad/h. The physico-mechanical and thermal properties of these films were evaluated. It was evident that 5% PVA-containing gelatin blend film exhibited the highest tensile strength (TS) value at 50 krad (51 MPa), which was 46% higher than that of non-irradiated blend films. It was also found that incorporation of PVA significantly reduced the TS value of the blend films compared to the raw film, whereas elongation at break (Eb) value was increased. A significant improvement of the blend films was also confirmed by thermogravimetric analysis (TGA) and thermo-mechanical analysis (TMA) when the acrylat...

Published
2011
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