Fate and transport of silica nanoparticles in a fixed bed adsorber and its impact on removal of organic contaminants

George A. Sorial, Hafiz Hussein Mohamed Salih, Rajib Sinha, Radha Krishnan, Craig Patterson

Research output: Contribution to journalArticlepeer-review

Abstract

Adsorption isotherm, kinetics and column breakthrough experiments evaluating trichloroethylene (TCE) adsorption onto granular activated carbon (GAC) were conducted in the presence and absence of SiO2 nanoparticles (NPs). Zeta potential and pH of point of zero charge of the NPs and the GAC were measured. Particle size distribution (PSD) of the NPs dispersions were also obtained as a function of time. The surface area and the pore size distribution of the virgin and the exhausted GAC were obtained along with (Transmission Electron Microscopy (TEM), High Resolution Scanning Electron Microscopy (HRSEM), and Fourier Transform Infra Red Microscopy (FTIR) analysis. The effect of SiO2 on the TCE adsorption and their fate and transport in the GAC column was found to be a function of zeta potential, concentration, and PSD. A direct electrostatic attraction was observed between the SiO2 and GAC. The isotherms, breakthrough and the kinetic data showed a noticeable increase in the amount of TCE adsorbed in the presence of SiO2, suggesting that the SiO2 particles are providing additional surface area.

Original languageEnglish (US)
JournalACS National Meeting Book of Abstracts
StatePublished - 2010
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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