Triclosan, an antimicrobial compound used in personal care products, occurs in the aquatic environment due to residual concentrations in municipal wastewater treatment effluent. We evaluate triclosan-related risks to the aquatic environment, for aquatic and sediment-dwelling organisms and for aquatic-feeding wildlife, based on measured and modeled exposure concentrations. Triclosan concentrations in surface water, sediment, and biota tissue are predicted using a fugacity model parameterized to run probabilistically, to supplement the limited available measurements of triclosan in sediment and tissue. Aquatic toxicity is evaluated based on a species sensitivity distribution, which is extrapolated to sediment and tissues assuming equilibrium partitioning. A probabilistic wildlife exposure model is also employed, and estimated doses are compared to wildlife toxicity benchmarks identified from a review of published and proprietary studies. The 95th percentiles of measured and modeled triclosan concentrations in surface water, sediment, and biota tissues are consistently below the 5th percentile of the respective species sensitivity distributions, indicating that under most scenarios adverse affects due to are unlikely. © 2010 SETAC

中文翻译：

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地表水、沉积物和水生生物群组织中三氯生的概率风险评估

三氯生是一种用于个人护理产品的抗菌化合物，由于城市废水处理流出物中的残留浓度，会出现在水生环境中。我们根据测量和模拟的暴露浓度评估三氯生对水生环境、水生和沉积物栖息生物以及以水生为食的野生动物的风险。使用参数化以概率运行的逸度模型预测地表水、沉积物和生物群组织中的三氯生浓度，以补充沉积物和组织中三氯生的有限可用测量值。水生毒性是根据物种敏感性分布评估的，假设平衡分配，该分布外推到沉积物和组织。还采用了概率野生动物暴露模型，并将估计剂量与通过审查已发表和专有研究确定的野生动物毒性基准进行比较。在地表水、沉积物和生物群组织中测量和模拟的三氯生浓度的第 95 个百分位始终低于相应物种敏感性分布的第 5 个百分位，表明在大多数情况下不太可能产生不利影响。© 2010 SETAC