Journal of Porous Materials

, Volume 19, Issue 1, pp 79–86 | Cite as

Adsorption of Imazamox herbicide onto Filtrasorb 400 activated carbon

  • Catherine Morlay
  • Etienne Quivet
  • Michaela Pilshofer
  • René Faure
  • Jean-Pierre Joly


Imazamox is an imidazolinone herbicide, a new class of pesticides, which can exist as cationic, anionic or neutral species in water. The adsorption isotherms of Imazamox onto Filtrasorb 400 (F400) activated carbon were determined varying the pH and the ionic strength of the aqueous medium. The results show that ionic strength has no significant effect on Imazamox uptake, contrary to pH, and that F400 has a high affinity for Imazamox. Moreover, it is found that Imazamox adsorbs onto F400 as its neutral form. The best fit of the experimental points is obtained with the Langmuir–Freundlich model, consistent with surface site heterogeneity. Finally, calculating Langmuir–Freundlich isotherms for various constant pH values, it is shown that the two plateaus observed in the experimental isotherms obtained at free pH are due to the variation of the pH along the isotherms.


Filtrasorb 400 activated carbon Imazamox herbicide Adsorption Langmuir–Freundlich equation 


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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Catherine Morlay
    • 1
    • 2
  • Etienne Quivet
    • 3
    • 4
  • Michaela Pilshofer
    • 1
    • 3
  • René Faure
    • 3
  • Jean-Pierre Joly
    • 1
  1. 1.Université de Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5256 (IRCELYON)Villeurbanne CedexFrance
  2. 2.University of Central Florida, NanoScience Technology CenterOrlandoUSA
  3. 3.Université de Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5180 (LSA)Villeurbanne CedexFrance
  4. 4.Universités d’Aix-Marseille I, II et III, CNRS UMR 6264 (LCP)Marseille Cedex 3France

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