中文摘要：

研究5种有机污染物在草甸土中的吸附和解吸行为.结果表明,污染物在土壤中的吸附主要受疏水性作用的影响,吸附数据基本符合传统的线性模型.解吸行为则表现出明显的滞后现象,解吸实验结果与“双元平衡解吸（DED）模型”的预测值相吻合.DED模型能够更加准确地定量描述疏水性有机污染物的解吸行为.

英文摘要：

Sorption and desorption behaviors of five common organic contaminants——naphthalene, phenanthrene, lindane, atrazine and fipronil in meadow soil were evaluated. Sorption of all the contaminants followed the conventional linear model well, indicating that sorption was driven primarily by hydrophobic partitioning.Desorption of the contaminants exhibited significant hysteresis, and desorption results could be well predicted with a dual-equilibrium desorption（DED）model.The DED model appears to be a more accurate desorption model for hydrophobic organic contaminants, and can be used as a quantitative tool for more accurate soil risk assessment and establishment of soil quality standards.