Table 5.14 Calculated values of the constants K1, K2 and K3 for the biodegradation experiments with pendimethalin and ioxynil conducted with and without particles Pesticide Ioxynil Pendimethalin Ioxynil Pendimethalin Locality Unit Lillebæk Odderbæk ktot hr^-1 0.00015 0.023 0.00032 0.028 Water volume L 0.1 0.1 0.1 0.1 Particle mass kg 0.0001 0.0001 0.0001 0.0001 Particle density kg/L 2.4 2.4 2.4 2.4 Particle volume L 4.2 10^-5 4.2 10^-5 4.2 10^-5 4.2 10^-5 Porosity L/L 0.9996 0.9996 0.9996 0.9996 Dry bulk density kg/L 0.001 0.001 0.001 0.001 Kd L/kg 5.9 224 19.2 2074 Retention 1.01 1.22 1.02 3.07 K3 hr-1 1 897 1 897 K2 hr-1 0.0000185 1.85E-05 0.0000185 1.85E-05 K3 hr-1 0.315 0.0309 0.733 0.185721