Abstract
The loss of pesticides in soil consists of biological degradation and nonbiological loss, while the nonbiological loss consists of chemical degradation and physical loss. This paper propounds a kinetic model describing the effect of temperature on pesticidal loss rate: where x is the concentration of pesticide at time t, k1 the first-order rate constant at absolute temperature T, k2 the second-order rate constant at T, c the minimum growth temperature for pesticide-degrading microorganisms, h the maximum growth temperature for the microorganisms, A1∗and A2∗ the constants relating to the pre-exponential factor of growth process of the microorganisms, E∗ the activation energy for growth process of the microorganisms, R the gas constant, A1 and A2 the constants relating to the pre-exponential factor of nonbiological loss process of the pesticide, and E the activation energy for nonbiological loss process of the pesticide.
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