Protein mediated textile dye filtration using graphene oxide-polysulfone composite membranes
Mokkapati, Raghu Sarma and Köseoğlu İmer, Derya Yüksel and Yılmaz, Nurmiray and Özgüz, Volkan Hüsnü and Koyuncu, İsmail (2015) Protein mediated textile dye filtration using graphene oxide-polysulfone composite membranes. RSC Advances, 5 (87). pp. 71011-71021. ISSN 2046-2069 (Print) 2046-2069 (Online)
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Official URL: http://dx.doi.org/10.1039/c5ra13131f
Here we report graphene oxide (GO) concentration dependent protein binding (BSA) and dye filtration (RO-16) capabilities of polysulfone-GO composite membranes under different pH conditions (2, 7 and 10). The membranes were fabricated with different GO concentrations (1, 2, 4 and 8% w/w) and were successfully characterized for their physical and chemical properties, as well as for their performance ability. The best BSA binding and dye rejection rates were observed with 2% GO membrane at pH = 10, which were 95% and 78.26% respectively, suggesting that 2% is the optimal concentration. Further, considering the fact that RO-16 dye is acidic friendly, contact time studies were carried out with 2% GO membranes at pH = 2 and pH = 10. It was observed that 2% GO-polysulfone membrane at pH = 2 shows the highest dye rejection rate of 87.4%, supporting the importance of contact time in filtration technology.
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