Adsorption and desorption of metolachlor and metolachlor metabolites in vegetated filter strip and cultivated soil

Journal of Environmental Quality
L Jason KrutzDennis Tierney

Abstract

Previous studies have indicated that dissolved-phase metolachlor [2-chloro-N-(2-ethyl-6-methylphenyl)-N-(methoxy-1-methylethyl) acetamide] transported in surface runoff is retained by vegetative filter strips to a greater degree than either metolachlor oxanilic acid 12-[(2-ethyl-6-methylphenyl) (2-methoxy-1-methylethyl)amino]-2-oxo-acetic acid] (OA) or metolachlor ethanesulfonic acid [2-[(2-ethyl-6-methylphenyl) (2-methoxy-1-methylethyl-1)amino]-2-oxoethanesul-fonic acid] (ESA), two primary metabolites of metolachlor. Adsorption-desorption of ESA and OA in vegetated filter strip soil (VFSS) has not been evaluated, yet these data are required to assess the mobility of these compounds in VFSS. The objective of this experiment was to compare metolachlor, ESA, and OA adsorption and desorption parameters between VFSS and cultivated soil (CS). Adsorption and desorption isotherms were determined using the batch equilibrium procedure. With the exception of a 1.7-fold increase in organic carbon content in the VFSS, the evaluated chemical and physical properties of the soils were similar. Sorption coefficients for metolachlor were 88% higher in VFSS than in CS. In contrast, sorption coefficients for ESA and OA were not different between ...Continue Reading

Citations

Apr 24, 2020·Environmental Science and Pollution Research International·Pauline SidoliNicole Baran
Aug 12, 2008·Journal of Environmental Quality·Katy E SmithJohn M Clark
Oct 3, 2015·Ecotoxicology·Yingna XingXin Chen
May 6, 2008·Journal of Environmental Quality·Tracy C HancockJack E Barbash
Feb 14, 2021·Environmental Research·Jesús M Marín-BenitoM Sonia Rodríguez-Cruz
May 20, 2019·Journal of Contaminant Hydrology·Jeanne DollingerShibu Jose
Aug 6, 2009·Journal of Agricultural and Food Chemistry·Sharon K PapiernikScott R Yates

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