Herbicides Temperature (K) Soil Kf (mg/Kg ) 1/n R2 Koc (mg/kg) Kom (mg/kg ) Simazine 298 A 1.1581 0.1496 0.9978 13.4662 8.4532 B 0.9138 0.3251 0.9868 43.5142 19.0357 308 A 0.8559 0.3293 0.9933 17.8312 6.2474 B 0.6039 0.4747 0.9925 28.7571 12.5812 Atrazine 298 A 1.0113 0.2121 0.9889 11.7593 7.3817 B 0.8395 0.2865 0.9811 39.9762 17.4896 308 A 0.8009 0.3598 0.9846 9.3128 5.8459 B 0.5898 0.3876 0.9942 28.0857 12.2875

Table 2: The adsorption parameters of simazine and atrazine in agricultural soils at different temperature. The values represent an average value of three independent experiments.