Equilibrium and intra-particle diffusion of stabilized landfill leachate onto micro- and meso-porous activated carbon

Shrawan K. Singh, Timothy G. Townsend, David Mazyck, Treavor Boyer

Research output: Contribution to journalArticle

80 Citations (Scopus)

Abstract

Stabilized landfill leachate has previously been treated with activated carbon (AC); however, information on the selectivity of AC depending upon the pore size is minimal. Isotherm and kinetic experiments were conducted using three commercially available AC products, one micro-porous and two meso-porous. Equilibrium adsorption and intra-particle diffusion of organic matter from stabilized leachate was studied. Isotherm experimental data were fitted to Langmuir, Freundlich, and Redlich-Peterson isotherm models in non-linear forms. Of the three isotherm models, the Redlich-Peterson model provided the best fit to the experimental data and showed a similar organic matter adsorption capacity (approximately 0.2 g total organic carbon (TOC) g -1 AC) for both micro-porous and meso-porous AC. The organic matter effective intra-particle diffusion coefficients (D e) in both AC types were on the order of 10 -10 m 2 s -1 for AC particle sizes greater than 0.5 mm. Meso-porous ACs showed slightly higher D e compared to micro-porous AC. Rapid small-scale tests showed a maximum of 80% TOC removal from leachate by each AC investigated. Fluorescence spectroscopy showed a preferential adsorption of fulvic-type organic matter with an increase in empty bed contact time by each AC.

Original languageEnglish (US)
Pages (from-to)491-499
Number of pages9
JournalWater Research
Volume46
Issue number2
DOIs
StatePublished - Feb 1 2012
Externally publishedYes

Fingerprint

Land fill
Activated carbon
activated carbon
Biological materials
Isotherms
isotherm
organic matter
Organic carbon
adsorption
Adsorption
total organic carbon
leachate
particle
landfill leachate
fluorescence spectroscopy
Fluorescence spectroscopy
Pore size
Particle size
particle size
kinetics

Keywords

  • Adsorption
  • Fluorescence
  • Landfill leachate
  • Leachate treatment
  • Meso-porous activated carbon
  • Micro-porous activated carbon

ASJC Scopus subject areas

  • Water Science and Technology
  • Waste Management and Disposal
  • Pollution
  • Ecological Modeling

Cite this

Equilibrium and intra-particle diffusion of stabilized landfill leachate onto micro- and meso-porous activated carbon. / Singh, Shrawan K.; Townsend, Timothy G.; Mazyck, David; Boyer, Treavor.

In: Water Research, Vol. 46, No. 2, 01.02.2012, p. 491-499.

Research output: Contribution to journalArticle

Singh, Shrawan K. ; Townsend, Timothy G. ; Mazyck, David ; Boyer, Treavor. / Equilibrium and intra-particle diffusion of stabilized landfill leachate onto micro- and meso-porous activated carbon. In: Water Research. 2012 ; Vol. 46, No. 2. pp. 491-499.
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