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  • Characteriszation of a second generation of European reference soils for sorption studies in the framework of chemical testing - Part 2: Soil adsorption behaviour of organic chemicals


In order to ensure the supply of European reference soils to laboratories engaged in soil sorption studies, the European Commisions' JRC introduced recently a second generation of EUROSOILS. In this paper the new EUROSOILS are compared to their precursors with regard to their adsorption behaviour of organic chemicals. To this end, the adsorption behaviour of 24 organic-chemicals belonging to 9 different substance classes were studied according to a procedure derived from the OECD test guideline 106 on adsorption/desorption. From the comparison of Freundlich isotherm data it was concluded that both versions of one reference soil feature the same adsorption behaviour. This is an agreement with the results presented in part one of this paper where chemical composition and pedological properties were compared. In case of EUROSOIL 1, 2 , 3 and 4 almost identical adsorption coefficients could be determined despite the fact, that analysis of soil organic carbonrevealed in some cases considerable differences in this parameter for both versions of one soil. EUROSOIL 5 showed a much higher adsorption potential than the previous version owing to a significantly higher organic carbon content - the only sorption relevant constituent in this soil. However, normalization by Corg lead to a good agreement of the derived Koc data for both soil versions. Based on these observations, the applicability of the widely used Koc-concept is discussed and the reference soil-set is proposed as a common basis for the achievement of a better comparison and of quality of soil sorption data within the framework of the chemical testing.

Additional information

Authors: GAWLIK B M, CCR Ispra (IT);MUNTAU H, CCR Ispra (IT);KETTRUP A, GSF Neuherberg (DE)
Bibliographic Reference: Article: Science of the Total Environment, 1998
Record Number: 199910703 / Last updated on: 1999-05-14
Original language: en
Available languages: en
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