The effect of atrazine on these organisms seems to be negligible. Photodegradation and volatilization are of little significance under most field conditions. Atrazine does not hydrolyze in soils when uncatalyzed even at elevated temperatures. However, the rate of hydrolysis was found to drastically increase upon small additions of sterilized soil, humic acid, and fulvic acid, indicating atrazine hydrolysis could be catalyzed. Atrazine was completely hydrolyzed within 3-4 days at extreme pHs.
Alkaline hydrolysis proceeds twice as rapid as acidic hydrolysis.
The average Koc value for 4 soils was determined to be 122. Based on the Koc values for soils, atrazine is expected to maintain a high to medium mobility class in soils. However atrazine may also strongly absorb to colloidal materials in the water column. The downward movement or leaching is limited by its adsorption to certain soil constituents. Experimental log BCF values of 2.0 to 0.3 have been reported for atrazine in six fish species.