Chapter 20
Assessment of Herbicide Transport and Persistence in Groundwater: A Review 1
Downloaded by UNIV OF TENNESSEE KNOXVILLE on November 14, 2016 | http://pubs.acs.org Publication Date: June 21, 1996 | doi: 10.1021/bk-1996-0630.ch020
S. K. Widmer and Roy F. Spalding Water Sciences Laboratory, University of Nebraska-Lincoln, 103 Natural Resources Hall, Lincoln, NE 68583-0844
The mobility and persistence of commonly-detected herbicides and herbicide degradates in groundwater were measured in a natural gradient field transport study. Retardation factors (Rs) were calculated by nonlinear regression of experimental breakthrough curves using two physical-chemical models. Butachlor was the most highly retained herbicide (R=1.7-1.9); all other compounds showed retardation
