Adsorption kinetics of Escherichia coli and Staphylococcus aureus on single-walled carbon nanotube aggregates

Venkata K K Upadhyayula, Shuguang Deng, Martha C. Mitchell, Geoffrey B. Smith, Vinod K. Nair, Soumitra Ghoshroy

Research output: Chapter in Book/Report/Conference proceedingChapter

31 Scopus citations

Abstract

Batch adsorption studies to determine adsorption kinetics of Escherichia coli (E.coli) K12 and Staphylococcus aureus (S.aureus) SH 1000 bacterial cells on single-walled carbon nanotube aggregates were performed at two different initial concentrations. The diffusivity of E. coli cells in single-walled carbon nanotube aggregates obtained was 6.54 × 10-9 and 8.98 × 10-9 cm2/s, whereas that of S. aureus was between 1.00 × 10-7 and 1.66 × 10-7 cm2/s respectively. In addition to batch adsorption studies, electron microscopy studies were also conducted. The results suggest that diffusion kinetics of bacterial cells is concentration dependent as well as bacteria dependent. Diffusivity of S. aureus is two orders of magnitude greater than E. coli cells. This proves to be beneficial from an adsorption perspective where it is desired to filter microorganisms (water pretreatment and wastewater post treatment) and from nanotube biosensor perspective where it is desired to simultaneously capture and detect biothreat agents in a shorter span of time.

Original languageEnglish (US)
Title of host publicationWater Science and Technology
Pages179-184
Number of pages6
Volume58
Edition1
DOIs
StatePublished - 2008
Externally publishedYes

Publication series

NameWater Science and Technology
Number1
Volume58
ISSN (Print)02731223

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Keywords

  • Carbon nanotubes
  • Diffusivity
  • Microbial adsorption
  • Ultramicrotomy
  • Water treatment

ASJC Scopus subject areas

  • Water Science and Technology

Cite this

Upadhyayula, V. K. K., Deng, S., Mitchell, M. C., Smith, G. B., Nair, V. K., & Ghoshroy, S. (2008). Adsorption kinetics of Escherichia coli and Staphylococcus aureus on single-walled carbon nanotube aggregates. In Water Science and Technology (1 ed., Vol. 58, pp. 179-184). (Water Science and Technology; Vol. 58, No. 1). https://doi.org/10.2166/wst.2008.634