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Adsorption Effects on Kinetics of Aldicarb Degradation

Equilibrium Model and Application to Incubation and Transport Experiments

^a Dep. of Soil, Crop and Atmospheric Sciences, Cornell Univ., Ithaca, NY 14853 USA
^b Dep. of Environmental Sciences, Univ. of California, Riverside, CA 92521 USA

View larger version (13K): [in a new window]   Fig. 1 Kinetics of aldicarb adsorption measured in a Valois silt loam amended with various amounts of activated C (error bars represent one standard deviation)

View larger version (18K): [in a new window]   Fig. 2 Adsorption isotherm of aldicarb measured in a Valois silt loam amended with various amounts of activated carbon. Symbols denote measurements (error bars represent one standard deviation), and lines represent fitted linear Freundlich isotherms

View larger version (13K): [in a new window]   Fig. 3 Total soil respiration measured in a Valois silt loam amended with various amounts of activated carbon (error bars represent one standard deviation)

View larger version (22K): [in a new window]   Fig. 4 Decay of aldicarb in a Valois silt loam amended with various amounts of activated carbon. Symbols denote measurements (error bars represent one standard deviation), and lines are fitted first-order reactions

View larger version (13K): [in a new window]   Fig. 5 The Kd–µ relationship of aldicarb for incubation experiments

View larger version (24K): [in a new window]   Fig. 6 Measured breakthrough curves of aldicarb. The residual mass (Mr) for AC0 and AC1 was below method detection limit (<0.04 µg g-1). L is the length of the column, v is the pore water velocity, and T0 is the step pulse length in the unit of pore volume

View larger version (12K): [in a new window]   Fig. 7 The Kd–µ relationship of aldicarb in continuous-flow columns