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Environmental fate & pathways

Adsorption / desorption

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Description of key information

Based on calculations using water solubility data for TEL an estimated KOC values of 1 300 is quoted

Key value for chemical safety assessment

Koc at 20 °C:
1 300

Additional information

Based on physchem properties, the sorption of TEL to organic soil is very strong.

According to the U.S. EPA (1985) TEL is expected to adsorb to suspended particles and sediments in water, due to its relatively low water solubility. The water solubility for TEL of 9 ppm, gives an estimated KOC values of 1 300. According to Litz (1990) TEL is practically immobile in soils, which corresponds to very strong and strong sorption respectively, . In the presence of other solvents, the mobility of TEL may be increased significantly.

Volatilization from the soil is possible only on a limited basis (EPA, 1985). Robinson and Rhodes (1980) investigated the solubility of TEL in filtered and unfiltered sea water and came to the conclusion that it can be adsorbed to suspended sediment in the marine system and accumulate there. Since the water solubilities of di¿ and trialkyl¿ lead salts are quite high, low soil sorption is expected for these compounds, as was confirmed by the U.S. EPA (1985)