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Smarter Sediment Screening: Effect-Based Quality Assessment, Chemical Profiling, and Risk Identification

机译：更智能的泥沙筛选：基于效果的质量评估，化学分析和风险识别

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摘要

Sediments play an essential role in the functioning of aquatic ecosystems but simultaneously retain harmful compounds. However, sediment quality assessment methods that consider the risks caused by the combined action of all sediment-associated contaminants to benthic biota are still underrepresented in water quality assessment strategies. Significant advancements have been made in the application of effect-based methods, but methodological improvements can still advance sediment risk assessment. The present study aimed to explore such improvements by integrating effect-monitoring and chemical profiling of sediment contamination. To this end, 28 day life cycle bioassays with Chironomus riparius using intact whole sediment cores from contaminated sites were performed in tandem with explorative chemical profiling of bioavailable concentrations of groups of legacy and emerging sediment contaminants to investigate ecotoxicological risks to benthic biota. All contaminated sediments caused effects on the resilient midge C. riparius, stressing that sediment contamination is ubiquitous and potentially harmful to aquatic ecosystems. However, bioassay responses were not in line with any of the calculated toxicity indices, suggesting that toxicity was caused by unmeasured compounds. Hence, this study underlines the relevance of effect-based sediment quality assessment and provides smarter ways to do so.
机译：沉积物在水生生态系统的功能中起着至关重要的作用，但同时保留了有害化合物。但是，考虑到所有与沉积物相关的污染物共同作用于底栖生物群的风险的沉积物质量评估方法在水质评估策略中仍然不足。基于效果的方法的应用已取得重大进展，但方法学上的改进仍可促进沉积物风险评估。本研究旨在通过整合效果监测和沉积物污染的化学分析来探索这种改进。为此，使用来自污染地点的完整完整沉积物岩心进行了28天的生命周期生物测定，使用了河豚草（Chironomus riparius），并对探索性和化学分析的生物可利用浓度的遗留和新兴沉积物污染物进行了组合研究，以调查底栖生物的生态毒理风险。所有受污染的沉积物都对有弹性的蚊虫C. riparius产生影响，强调沉积物污染无处不在，并且可能对水生生态系统有害。然而，生物测定反应与任何计算出的毒性指数均不符，表明毒性是由未测化合物引起的。因此，本研究强调了基于效果的沉积物质量评估的相关性，并提供了更明智的方法。

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