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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
chemistry
Calculating pesticide sorption coefficients ( K
d
) using selected soil properties
Chemosphere, Volume 55, No. 2, Year 2004
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Description
Pesticide soil/solution distribution coefficients (Kd values), commonly referred to as pesticide soil sorption values, are utilized in computer and decision aid models to predict soil mobility of the compounds. The values are specific for a given chemical in a given soil sample, normally taken from surface soil, a selected soil horizon, or at a specific soil depth, and are normally related to selected soil properties. Pesticide databases provide Kd values for each chemical, but the values vary widely depending on the soil sample on which the chemicals were tested. We have correlated K d values reported in the literature with the reported soil properties for an assortment of pesticides in an attempt to improve the accuracy of a Kd value for a specific chemical in a soil with known soil properties. Mathematical equations were developed from regression equations for the related properties. Soil properties that were correlated included organic matter content, clay mineral content, and/or soil pH, depending on the chemical properties of the pesticide. Pesticide families for which Kd equations were developed for 57 pesticides include the following: Carboxy acid, amino sulfonyl acid, hydroxy acid, weakly basic compounds and nonionizable amide/anilide, carbamate, dinitroaniline, organochlorine, organophosphate, and phenylurea compounds. Mean Kd values for 32 additional pesticides, many of which had Kd values that were correlated with specific soil properties but for which no significant Kd equations could be developed are also included. © 2003 Elsevier Ltd. All rights reserved.
Authors & Co-Authors
Weber, Jerome B.
United States, Raleigh
Nc State University
Wilkerson, Gail G.
United States, Raleigh
Nc State University
Reinhardt, Carl Frederick
South Africa, Pretoria
University of Pretoria
Statistics
Citations: 194
Authors: 3
Affiliations: 2
Identifiers
Doi:
10.1016/j.chemosphere.2003.10.049
ISSN:
00456535
Research Areas
Environmental