【摘要】 运用区室模型对菲和五氯酚(PCP)在8种沉积物中的吸附行为进行了研究.将吸附系统分为液相、固相可逆吸附相、固相不可逆吸附相3个区室.结果表明,8种沉积物对菲和PCP的吸附均表现出相似的变化趋势,即在吸附初期,液相浓度迅速下降,在约10d时开始趋于稳定,可逆吸附相浓度在前10d迅速上升,随后开始下降,不可逆吸附相在整个吸附过程中一直保持上升.沉积物对菲的不可逆吸附占总吸附量的比例比PCP大.用实验数据对模拟不可逆吸附量进行验证表明,模拟值比实验值偏低,可能是由于实验方法差异造成的.吸附态目标物甲醇提取率随吸附时间延长而降低,有机质含量较高的沉积物提取率较低.更多还原

【Abstract】 Compartment model was applied to predict the sorption behavior of phenanthrene and pentachlorophenol (PCP) in eight sediments. Time-dependent interaction of phenanthrene with PCP was operationally described regarding to the reversible and irreversible sediment fractions in sediment. The results showed that the sorption behaviors of both phenanthrene and PCP were similar, i.e., the reversible fraction increased rapidly in the first 10 days, then decreased after 10 days, while irreversible fraction increased during the total sorption course. However, the percentage of irreversible sorption to the total for phenanthrene was higher than that for PCP. The predicted irreversible sorption was lower than the experimental ones, because of the deviations in experiments. The extraction efficiency using methanol ranged from 36% to 103% for phenanthrene and 65% to 101% for PCP, decreased with sorption time and increased with content of organic carbon.更多还原