Comparative analysis of whole sediment and porewater toxicity identification evaluation techniques for ammonia and non-polar organic contaminants

摘要: Porewater and whole sediment toxicity identification evaluations (TIEs) were performed on contaminated Illinois River compared using two standardized toxicity-testing organisms (Ceriodaphnia dubia Hyalella azteca). Results suggested that the choice of testing matrix (porewater versus sediment) significantly influenced characterization toxicity. The porewater TIE ammonia was major source toxicity, while indicated non-polar organics, specifically polycyclic aromatic hydrocarbons, primary contributor to with being a secondary While test organism may have played smaller role in discordance between TIEs, data suggest this factor alone could play prevalent characterizing other assessments. Because TIEs examine differently, both approaches as part risk assessment provide more accurate estimate