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Environmental fate & pathways

Adsorption / desorption

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Description of key information

43<koc<202 at 20°C for soil with an organic matter of 0.2 - 3 % (organic carbon)

Key value for chemical safety assessment

Koc at 20 °C:
202

Additional information

Koc of 1,2,4 -triazole for various soils ranged from 43 to 202 with organic matter from 0.2 to 3% (Hawkins, 1988). The average of Koc for these soils was found to be 112 ± 53. Based on this value, one must expect triazole to have a certain mobility in soil. This mobility may not be as great as one might predicted based on the adsorption results due to the presence of some irreversible adsorption which was observed during the desorptions. Similarly, the Freundlich adsorption constants k determined for 1,2,4-triazole varied between 0.19 and 3.35 µg per g of soil demonstrating that the compound was less strongly adsorbed on soil particles than the pesticides compared (Keller, 1983). Desorption occurred at a slower rate than adsorption which is shown by the higher desorption coefficients determined in two 24 hours desorption steps.

[LogKoc: 2.3]