【摘要】 采用正交实验法研究了温度、pH、离子强度和溶解性有机质(DOC)对沉积物吸附菲和五氯酚(PCP)能力的影响.结果表明,上覆水温度和pH对个别沉积物的吸附能力有显著影响,其他因素及交互作用对菲和PCP的吸附无显著影响.沉积物对菲的吸附能力随温度升高而降低,对PCP在中温(20℃)时最小.pH对菲的吸附无显著影响,PCP的吸附量随pH升高而降低.DOC升高微弱地降低了菲和PCP的吸附,离子强度升高使PCP的吸附有微弱升高.沉积物对有机污染物的吸附能力主要由沉积物和有机污染物性质决定,受上覆水性质影响较小.更多还原

【Abstract】 By the method of orthogonal experiment,this paper studied the effects of overlying water temperature,pH,ion- ic strength,and dissolved organic carbon (DOC) on the sorption of phenanthrene and pentachlorophenol (PCP) in sediments.The results showed that temperature was the main factor affecting the sorption behavior of phenanthrene,with the trend of partition coefficient (Kd) decreased with temperature.For PCP,its Kd was the smallest at 20 ℃,and its sorption was decreased with pH.The DOC content of overlying water slightly decreased the Kd of phenanthrene and PCP,and ionic strength only increased the Kd of PCP slightly.The sorption capacity of organic pollutants in sediment was mainly determined by the properties of organic pollutants and sediments.更多还原