Abstract

This study investigates the impact of the type of virgin granular activated carbon (GAC) media used to synthesize iron (hydr)oxide nanoparticle-impregnated granular activated carbon (Fe-GAC) on its properties and its ability to remove arsenate and organic trichloroethylene (TCE) from water. Two Fe-GAC media were synthesized via a permanganate/ferrous ion synthesis method using bituminous and lignite-based virgin GAC. Data obtained from an array of characterization techniques (pore size distribution, surface charge, etc.) in correlation with batch equilibrium tests, and continuous flow modeling suggested that GAC type and pore size distribution control the iron (nanoparticle) contents, Fe-GAC synthesis mechanisms, and contaminant removal performances. Pore surface diffusion model calculations predicted that lignite Fe-GAC could remove ~6.3Lg-1 dry media and ~4Lg-1 dry media of water contaminated with 30μgL-1 TCE and arsenic, respectively. In contrast, the bituminous Fe-GAC could remove only ~0.2L/g dry media for TCE and ~2.8L/g dry media for As of the same contaminated water. The results show that arsenic removal capability is increased while TCE removal is decreased as a result of Fe nanoparticle impregnation. This tradeoff is related to several factors, of which changes in surface properties and pore size distributions appeared to be the most dominant.

Original languageEnglish (US)
Pages (from-to)381-388
Number of pages8
JournalJournal of Hazardous Materials
Volume183
Issue number1-3
DOIs
StatePublished - Nov 2010

Fingerprint

Trichloroethylene
Arsenic
trichloroethylene
Iron oxides
Activated carbon
Nanoparticles
iron oxide
activated carbon
arsenic
Carbon
carbon
Pore size
Coal
Lignite
lignite
Water
ferric oxide
removal
nanoparticle
effect

Keywords

  • Adsorption
  • Arsenic
  • GAC
  • Iron (hydr)oxide
  • Nanoparticle
  • Trichloroethylene
  • Water treatment

ASJC Scopus subject areas

  • Health, Toxicology and Mutagenesis
  • Pollution
  • Waste Management and Disposal
  • Environmental Chemistry
  • Environmental Engineering

Cite this

The effect of carbon type on arsenic and trichloroethylene removal capabilities of iron (hydr)oxide nanoparticle-impregnated granulated activated carbons. / Cooper, Anne Marie; Hristovski, Kiril; Möller, Teresia; Westerhoff, Paul; Sylvester, Paul.

In: Journal of Hazardous Materials, Vol. 183, No. 1-3, 11.2010, p. 381-388.

Research output: Contribution to journalArticle

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