Page Banner

United States Department of Agriculture

Agricultural Research Service

Title: Sorption of Imidacloprid on Soil Clay Mineral and Organic Components

Authors
item Cox, Lucia - UNIVERSITY OF MINNESOTA
item Koskinen, William
item Yen, Pau - BAYER CORPORATION
item Celis, Rafael - CSIC-IRNAS, SPAIN

Submitted to: American Chemical Society Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: April 14, 1997
Publication Date: N/A

Technical Abstract: Soil clay mineral and organic components are responsible for pesticide sorption controlling transport in runoff and to ground water. This study assessed the influence of different components of soil clay fractions, montmorillonite, iron oxide, and humic acid and binary and ternary associations on sorption of imidacloprid. Sorption on soil clay fractions increased with increased percent OC and surface area. This indicates a contribution of surfaces of mineral components of soil clay for sorption. Imidacloprid sorbed on montmorillonite and humic acid, but sorption was low on iron oxide. Sorption Kd on montmorillonite increased when pH decreased, suggesting protonation of the imidazol ring. Sorption on binary and ternary associations of sorbents indicated that organic matter is the most important single component affecting sorption of imidacloprid.

Last Modified: 10/23/2014