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Toward Validation of Toxicological Interpretation of Diffusive Gradients in Thin-films in Marine Waters Impacted by Copper.
Environmental Toxicology and Chemistry ( IF 3.6 ) Pub Date : 2020-03-04 , DOI: 10.1002/etc.4673
Jonathan Strivens 1 , Nicholas Hayman 2 , Gunther Rosen 2 , Allison Myers-Pigg 1
Affiliation  

Determination of the median effective concentration (EC50) of Cu, on Mytilus galloprovincialis larvae, by diffusive gradient in thin-films (DGT) has been shown to effectively reduce the need to consider dissolved organic carbon (DOC) concentration and quality. Standard toxicity test protocol was used to validate previously modelled protective effects, afforded to highly sensitive marine larvae by ligand competition, in five diverse site waters. The results demonstrate significant narrowing of M. galloprovincialis toxicological endpoints, where EC50s ranged from 3.74 - 6.67 μg/L as CDGT Cu versus 8.76 - 26.8 μg/L as CuDISS over a DOC range of 0.74 - 3.11 mg/L; Strongylocentrotus purpuratus EC50s were 10.5 - 19.3 μg/L as CDGT Cu versus 22.7 - 67.1 μg/L as CuDISS over the same DOC range. Dissolved organic carbon quality was characterized by fluorescence excitation and emission matrices. The results indicate that the heterogeneity of competing Cu binding ligands, in common marine waters, minimizes the need for class determinations toward explaining the degree of protection. Using conservative assumptions, an M. galloprovincialis CDGT Cu EC50 of 3.7 µg/L and corresponding CMC CDGT Cu of 1.8 µg/L, for universal application by regulatory compliance-monitoring programs, are proposed as a superior approach toward both integration of dynamic water quality over effective exposure periods and quantification of biologically-relevant trace Cu speciation. This article is protected by copyright. All rights reserved.

中文翻译:

旨在验证受铜影响的海水中薄膜中扩散梯度的毒理学解释。

通过薄膜中的扩散梯度(DGT)确定在Mytilus galloprovincialis幼虫上的Cu的中位有效浓度(EC50)已显示有效减少了考虑溶解有机碳(DOC)浓度和质量的需要。使用标准毒性测试方案验证了先前建模的保护作用,该作用是通过在五个不同场所的水中通过配体竞争为高度敏感的海洋幼虫提供的。结果表明,在0.74-3.11 mg / L的DOC范围内,CDGT Cu的EC50范围为3.74-6.67μg/ L,而CuDISS的EC 50范围为3.76-2.67μg/ L;而Mall galloprovincialis的毒理学终点显着缩小。在相同的DOC范围内,CDGT Cu的紫僵菌(EC)的EC50为10.5-19.3μg/ L,而CuDISS为22.7-67.1μg/ L。溶解的有机碳质量通过荧光激发和发射矩阵来表征。结果表明,在常见的海水中,竞争性的Cu结合配体的异质性使解释保护程度的类别确定的需要最小化。根据保守的假设,建议通过监管合规性监测计划普遍应用鸡血支原体CDGT Cu EC50为3.7 µg / L,相应的CMC CDGT Cu为1.8 µg / L,作为动态水质整合的一种卓越方法有效暴露时间段内以及与生物学相关的痕量铜形态的定量分析。本文受版权保护。版权所有。在常见的海水中,可以最大程度地减少对确定防护等级进行等级确定的需要。根据保守的假设,建议通过监管合规性监测计划普遍应用鸡血支原体CDGT Cu EC50为3.7 µg / L,相应的CMC CDGT Cu为1.8 µg / L,作为动态水质整合的一种卓越方法有效暴露时间段内以及与生物学相关的痕量铜形态的定量分析。本文受版权保护。版权所有。在常见的海水中,可以最大程度地减少对确定防护等级进行等级确定的需要。在保守的假设下,建议通过监管合规性监测计划普遍应用鸡血支原体CDGT Cu EC50为3.7 µg / L和相应的CMC CDGT Cu为1.8 µg / L,作为动态水质综合的一种较好方法有效暴露时间段内以及与生物学相关的痕量铜形态的定量分析。本文受版权保护。版权所有。提出了一种有效的方法,既可以对有效暴露时间段内的动态水质进行积分,也可以对生物相关的痕量铜形态进行量化。本文受版权保护。版权所有。提出了一种有效的方法,既可以对有效暴露时间段内的动态水质进行积分,也可以对生物相关的痕量铜形态进行量化。本文受版权保护。版权所有。
更新日期:2020-04-22
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