Sorption of pyrene on two paddy soils and their particle-size fractions
  • 【DOI】

    10.3321/j.issn:1001-0742.2005.06.017

  • 【摘要】

    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 investiga... 展开>>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 μm) and coarse sand fraction(2000-250 μm) had higher sorption capacity than fine sand fraction(250-20μm) and silt fraction(20-2 μm). The logKoc 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. 收起<<

  • 【作者】

  • 【作者单位】

    Institute of Resources

  • 【刊期】

    环境科学学报(英文版) ISTIC SCI 2005年6期

  • 【关键词】

    paddy soil  particle-size fraction  PAHs  sorption 

  • 【基金项目】

    国家自然科学基金