||Estimation of parameters for modeling the behavior of selected pesticides and orthophosphate /
Rao, P. S. C. ;
Berkheiser, V. E. ;
Ou, L. T.
||Florida Univ., Gainesville. Dept. of Soil Science.;Environmental Research Lab., Athens, GA. Technology Development and Applications Branch.
|| U.S. Environmental Protection Agency, Environmental Research Laboratory, Technology Development and Applications Brancy,
Organic phosphates ;
Farm crops ;
Mathematical models ;
Reaction kinetics ;
Environmental impacts ;
Path of pollutants
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||197 pages ; 28 cm
A 3-year laboratory study was conducted to determine sorption and degradation of selected pesticides as well as sorption of orthophosphorus on several U.S. agricultural soils. The data obtained in the study permit the estimation of sorption and degradation parameters required in predicting nonpoint source loadings of pesticides and phosphorus from croplands. Nine pesticides (six herbicides and three insecticides) representing a broad range of chemical classes were studied. The pesticide studies were conducted with seven soil types; P-sorption was measured on 36 soils that are distributed widely across the United States. Data suggest that sorption coefficient based on soil organic carbon is not only independent of soil type but also of soil particle size within a soil type. For all pesticides studied, microbial degradation rates followed first-order kinetics.
"Jan. 1984." PB84-148774. EPA-600/3-84-019. "Final report November 1977 - July 1981." Microform.