Adsorption of Imazamox herbicide onto Filtrasorb 400 activated carbon

    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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