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Effects of Dissolved Organic Matter from Animal Waste Effluent on Chlorpyrifos Sorption by Soils

Department of Agronomy, Purdue Univ., West Lafayette, IN 47907-1150

View larger version (13K): [in a new window]   Fig. 1. Representative plots of apparent water solubility (S) of chlorpyrifos as a function of dissolved organic matter (DOM) source and concentration. Error bars represent standard deviations.

View larger version (14K): [in a new window]   Fig. 2. Correlation between pesticide–dissolved organic matter distribution coefficient (Ki-DOM) and C/(O + N) ratios. Error bars represent standard deviations.

View larger version (14K): [in a new window]   Fig. 3. Representative isotherms for sorption of dissolved organic matter (DOM) by Toronto soil. Error bars represent standard deviations.

View larger version (21K): [in a new window]   Fig. 4. Relationship between the measured and predicted soil–water distribution coefficient of an organic chemical in the presence of dissolved organic matter . Error bars for predicted values were estimated by propagation of errors.