Arnold W R, Cotsifas J S, Corneillie K M
Copper Development Association, Inc., 260 Madison Avenue, New York, New York 10016, USA.
Environ Toxicol. 2006 Feb;21(1):65-70. doi: 10.1002/tox.20156.
A model was recently published that relates the toxicity of copper to the most sensitive taxa in the U.S. Environmental Protection Agency's criteria database (Mytilus sp.) with dissolved organic carbon concentrations in saltwater. This model was developed for potential use in risk assessment and in the development of site-specific criteria (SSC) for copper in saltwater environments where Mytilus sp. is considered an appropriate indicator species. This manuscript presents the results of a field validation study of that model. Effective concentration 50% (EC(50)) values (n = 21) for seven sites were all predicted by the model within the previously established range of acceptability. Slopes and intercepts of the two data sets were not significantly different. Consequently, the data were pooled, and new equations were developed. Dissolved copper EC(50) values were highly correlated (r(2) = 0.76, n = 75, P < 0.0001) across a wide range of sample dissolved organic carbon (DOC) concentrations (0.3-12 mg C/L) and were explained by the equation EC(50) = 11.22 DOC(0.60). Two updated equations are proposed for consideration as a means of estimating site-specific final chronic criteria (FCC) and final acute criteria (FAC) for copper in marine and estuarine environments (copper FCC(DOC) = 3.59 DOC(0.60); copper FAC(DOC) = 5.61 DOC(0.60)).
最近发表了一个模型，该模型将铜的毒性与美国环境保护局标准数据库中最敏感的分类群（紫贻贝属）相关联，并与咸水中的溶解有机碳浓度建立联系。该模型是为了在风险评估以及为紫贻贝属被视为合适指示物种的咸水环境中制定特定场地铜标准（SSC）时可能的应用而开发的。本手稿展示了该模型的现场验证研究结果。该模型对七个地点的半数有效浓度（EC(50)）值（n = 21）的预测均在先前确定的可接受范围内。两个数据集的斜率和截距没有显著差异。因此，将数据合并，并开发了新的方程。在广泛的样品溶解有机碳（DOC）浓度范围（0.3 - 12 mg C/L）内，溶解铜的EC(50)值高度相关（r(2) = 0.76，n = 75，P < 0.0001），并且可以用方程EC(50) = 11.22 DOC(0.60)来解释。提出了两个更新方程供考虑，作为估算海洋和河口环境中铜的特定场地最终慢性标准（FCC）和最终急性标准（FAC）的一种方法（铜FCC(DOC) = 3.59 DOC(0.60)；铜FAC(DOC) = 5.61 DOC(0.60)）。
