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Effect of adjuvants on kinetics of adsorption of atrazine

Włodarczyk M., Wybieralski J.

Chemia i Inżynieria Ekologiczna

2006

Vol. 13, nr 7

703-708

This study investigates the effect of adjuvants on the kinetics of adsorption of model substance atrazine, and the values of water/soil partition coefficients Kd and Koc. Laboratory experiments were conducted on three soils with different organic carbon content (Winna Gora Corg = 0.69 %, Lipnik Corg = 1.65 %, Slawoszewo Corg = 4.83 %). In the experiment two oil adjuvants: Adpros 85 SL, Olejan 85 EC (0.04% v/v) and surfactant Break-Thru S 240 (0.002 % v/v) were used. Two-phase adsorption was clearly observed for all mixtures in all three soils (the first, rapid - non-linear phase and the second, slower - linear phase). The data indicates that the adsorption behavior of atrazine in each soil in the presence of the adjuvants varies. Application of adjuvants resulted in an increase or a decrease in s-triazine adsorption.