Fisheries and Illinois Aquaculture Center and Department of Zoology, Southern Illinois University, Carbondale, IL 62901, USA.
Chemosphere. 2010 Feb;78(7):814-21. doi: 10.1016/j.chemosphere.2009.11.052. Epub 2009 Dec 29.
Porewater and whole sediment toxicity identification evaluations (TIEs) were performed on contaminated Illinois River sediment and compared using two standardized toxicity-testing organisms (Ceriodaphnia dubia and Hyalella azteca). Results suggested that the choice of testing matrix (porewater versus whole sediment) significantly influenced characterization of toxicity. The porewater TIE suggested that ammonia was the major source of toxicity, while the whole sediment TIE indicated that non-polar organics, specifically polycyclic aromatic hydrocarbons, were the primary contributor to toxicity, with ammonia being a secondary contributor to toxicity. While the choice of test organism may have played a smaller role in the discordance between the TIEs, the data suggest that this factor alone could play a prevalent role in characterizing toxicity in other TIE assessments. Because porewater and whole sediment TIEs examine sediment toxicity differently, using both TIE approaches as part of a risk assessment may provide a more accurate risk estimate of sediment toxicity.
对受污染的伊利诺伊河沉积物进行了孔隙水和全泥沙毒性鉴别评价（TIE），并使用两种标准化毒性测试生物（大型溞和霍氏弧菌）进行了比较。结果表明，测试基质（孔隙水与全泥沙）的选择显著影响毒性特征。孔隙水 TIE 表明氨是毒性的主要来源，而全泥沙 TIE 表明非极性有机物，特别是多环芳烃，是毒性的主要贡献者，氨是毒性的次要贡献者。尽管测试生物的选择可能在 TIE 之间的不一致中起较小的作用，但数据表明，在其他 TIE 评估中，仅这一因素就可能在描述毒性方面发挥重要作用。由于孔隙水和全泥沙 TIE 以不同的方式检测沉积物毒性，因此在风险评估中同时使用这两种 TIE 方法可能会更准确地估计沉积物毒性的风险。
