|Blume, Elena - FED UNIV OF SANTA MARIA|
|Bischoff, Marianne - PURDUE UNIVERSITY|
|Turco, Ronald - PURDUE UNIVERSITY|
Submitted to: Journal of Agricultural and Food Chemistry
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: September 13, 2004
Publication Date: December 1, 2004
Citation: Blume, E., Bischoff, M., Moorman, T.B., Turco, R.F. 2004. Degradation and binding of atrazine in surface and subsurface soils. Journal of Agricultural and Food Chemistry. 52(24):7382-7388. Interpretive Summary: Atrazine is a herbicide that has been detected in groundwater supplies resulting from leaching through soil from agricultural use. Past research has described the binding and degradation of atrazine in surface soils. This research examined the binding and degradation of atrazine in subsurface soils. We found that atrazine degraded at rates that were much slower than surface soils. At 175 to 220 cm (7.2 ft) below the soil surface atrazine was degraded at a rate that was 3% as fast as the rate in the surface soil. Atrazine was also bound less tightly in the subsurface soil. Atrazine metabolites also followed this pattern. These findings show that once atrazine enters the subsurface environment it will persist longer and leach more quickly than in surface soil. This information will aid development of computer models that predict contamination of groundwater and in the improvement of herbicide application technology to reduce herbicide leaching.