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.
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.
出处
《环境化学》
CAS
CSCD
北大核心
2008年第3期345-349,共5页
Environmental Chemistry
基金
国家自然科学基金(No20407013
No20577024)
教育部科学技术研究重点项目(No105044)
霍英东教育基金会高等院校青年教师基金项目(No101081)
天津市科学技术委员会(No06TXTJJC14000)
教育部留学回国人员科研启动基金
关键词
有机污染物
土壤
吸附
解吸
organic contaminants,meadow soil,sorption,desorption
