Title

Adsorption of Imazamox herbicide onto Filtrasorb 400 activated carbon

Authors

Authors

C. Morlay; E. Quivet; M. Pilshofer; R. Faure;J. P. Joly

Comments

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Abbreviated Journal Title

J. Porous Mat.

Keywords

Filtrasorb 400 activated carbon; Imazamox herbicide; Adsorption; Langmuir-Freundlich equation; IONIZATION MASS-SPECTROMETRY; Chemistry, Applied; Chemistry, Physical; Materials Science, ; Multidisciplinary

Abstract

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.

Journal Title

Journal of Porous Materials

Volume

19

Issue/Number

1

Publication Date

1-1-2012

Document Type

Article

Language

English

First Page

79

Last Page

86

WOS Identifier

WOS:000301187400010

ISSN

1380-2224

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