ASSESSMENT OF THE INSECTICIDE CARBOFURANS POTENTIAL TO CONTAMINATE GROUNDWATER THROUGH SOILS IN THE SUBTROPICS

Citation
Jh. Yen et al., ASSESSMENT OF THE INSECTICIDE CARBOFURANS POTENTIAL TO CONTAMINATE GROUNDWATER THROUGH SOILS IN THE SUBTROPICS, Ecotoxicology and environmental safety, 38(3), 1997, pp. 260-265
Citations number
19
Categorie Soggetti
Toxicology,"Environmental Sciences
ISSN journal
01476513
Volume
38
Issue
3
Year of publication
1997
Pages
260 - 265
Database
ISI
SICI code
0147-6513(1997)38:3<260:AOTICP>2.0.ZU;2-S
Abstract
The possible contamination of groundwater by the insecticide carbofura n was assessed with the behavior assessment model (BAM) and groundwate r pollution-potential model (GWP). Dissipation coefficients of this in secticide in two subtropical soils at different moisture contents and soil temperatures were studied by determining the degradation and adso rption of the herbicide in soils, Movement of carbofuran was studied b y leaching the insecticide in a soil column in the laboratory, Under 4 0% field capacity and at 25 degrees C, more than 80% of carbofuran res idue was found in both Luchu clay and Yuanlin silty clay loam after in cubation for 63 days, The results indicate that the higher the moistur e content in the soil, the less the carbofuran residue under the soil moisture below the field capacity, Carbofuran tends to dissipate more easily in Yuanlin soil than in Luchu soil, The distribution coefficien t (K-d) with r(2) of 0.69 and 0.92 for Luchu and Yuanlin soils, respec tively, was found using the first-order kinetics law, In leaching expe riment, carbofuran exhibited easier movement in Luchu than in Yuanlin soil. (C) 1997 Academic Press.