HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Aochi, Y. Articles by Farmer, W. J. Search for Related Content PubMed Articles by Aochi, Y. Articles by Farmer, W. J. Agricola Articles by Aochi, Y. Articles by Farmer, W. J.

Spectroscopic Evidence for a Copper-Picloram Complex on Cu(II)-Saturated and Cu(II)-Hydrous Oxide Coated Montmorillonite

Department of Soil and Environmental Sciences, Univ. of California, Riverside, CA 92521

*Corresponding author.

ABSTRACT

Deuteration and deconvolution techniques were applied to infrared investigations of bonding between the herbicide picloram (4-amino-3,5,6-trichloropicolinic acid) and mineral surfaces. Self-supporting clay films for infrared analysis were prepared from aqueous suspensions of picloram with Cu-treated montmorillonite or with montmorillonite coated with Cu hydrous oxides. The spectral data show clear evidence for a coordination type bonding between picloram and the Cu-treated mineral surfaces. Additional evidence is presented from infrared data confirming the presence of the monomeric acid on Al- and Fe-treated montmorillonite. Deuteration of the picloram-Cu-montmorillonite and of the picloram-Cu hydrous oxide-montmorillonite systems were both extremely slow, requiring several weeks to complete compared to a few hours for the Al- and Fe-systems.

Received for publication May 18, 1987.