Removal of a reactive dye and hexavalent chromium by a reusable bacteria attached electrospun nanofibrous web


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Keskin N. O. S. , Celebioglu A., Sarioglu O. F. , Ozkan A. D. , UYAR T., Tekinay T.

RSC ADVANCES, vol.5, no.106, pp.86867-86874, 2015 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 5 Issue: 106
  • Publication Date: 2015
  • Doi Number: 10.1039/c5ra15601g
  • Journal Name: RSC ADVANCES
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.86867-86874
  • Gazi University Affiliated: Yes

Abstract

A contaminant resistant Lysinibacillus sp. NOSK was isolated from a soil sample and its Reactive Black 5 (RB5) and Cr(VI) removal efficiencies were investigated as a function of changes in the initial pH values, temperature, static/shaking conditions, reactive dye and Cr(VI) concentrations. In this study, an electrospun polysulfone nanofibrous web (PSU-NFW) was found to be effective in attachment of bacterial cells. Bacteria attached PSU-NFWs (bacteria/PSU-NFW) have shown highly efficient removal of RB5, as 99.7 +/- 0.9% and 35.8 +/- 0.4% for the pristine PSU-NFW. Moreover, the highest Cr(VI) removal efficiencies measured were 98.2 +/- 0.6% for bacteria attached PSU-NFW and 32.6 +/- 0.6% for the pristine PSU-NFW. Simultaneous removal of RB5 and Cr(VI) were also investigated. Reusability test results indicate that, bacteria/PSU-NFW can be reused for at least 7 cycles with 28.1 +/- 0.6% and 66.7 +/- 0.8% removal efficiencies for RB5 and Cr(VI), respectively.