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  • Title: Sorption of pyrene on two paddy soils and their particle-size fractions.
    Author: Li JH, Pan GX.
    Journal: J Environ Sci (China); 2005; 17(6):962-5. PubMed ID: 16465887.
    Abstract:
    In the present study, the sorption of pyrene on two kinds of bulk paddy soils, Gleyic Stagnic Anthrosols, and Ferric accumulic Stagnic Anthrosols as well as their particle-size fractions was investigated. The sorption isotherms fitted well with Freundlich equation. For both soils, the clay fraction( < 2 microm) and coarse sand fraction(2000-250 microm) had higher sorption capacity than fine sand fraction(250-20 microm) and silt fraction(20-2 microm). The log Koc values obtained of each soil and its particle-size fractions were similar, proving that SOM content was a key factor affecting pyrene sorption. The Kd values showed a significant correlation with contents of dithionite-extractable Fe in both paddy soils and a good relationship with CEC in Gleyic Stagnic Anthrosols, indicating possible effects of surface properties of particle-size fractions on the sorption of pyrene.
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