Sediment water (interface) mobility of metal(loid)s and nutrients under undisturbed conditions and during resuspension.,Journal of Hazardous Materials

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Sediment water (interface) mobility of metal(loid)s and nutrients under undisturbed conditions and during resuspension.
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2020-03-19 , DOI: 10.1016/j.jhazmat.2020.122543
Henning Schroeder ₁ , Lars Duester ₁ , Anne-Lena Fabricius ₁ , Dennis Ecker ₁ , Vera Breitung ₁ , Thomas A Ternes ₁

Affiliation

The contribution of the release from sediments to the overall river Trave budget was evaluated with respect to 16 metal(loid)s, three non-metals and the ions PO43- and NH4+. To consider undisturbed conditions and sediment resuspension in-situ dialyses-based and ex-situ suction-based pore water sampling was complemented by sequential extraction and suspension reactor experiments. In the investigated sediments, representative for the study area, metal(loid) partitioning between the different geochemical fractions was very similar despite some higher contaminated spots. Pore water investigations emphasis that profiling and peeper based analyses are comparable and deliver an indication that sediment dwelling organisms are exposed to elevated metal(loid) concentrations. However, higher toxicity of the contaminated sediments compared to the sediment treated as background reference was not revealed. During resuspension only few metal(loid)s exceeded specified guideline values. The maximum amounts released, were only between 10-5 and 10-1% of the average daily load of the river Trave per ton of suspended sediment. Overall the "most pristine sediments" and not the potentially hazardous materials in the study area are found to be from highest concern. The results support requests to better include fractionation and speciation demands in legal assessments of sediments.

中文翻译：

在不受干扰的条件下和重悬过程中，金属（胶体）和养分的沉淀水（界面）迁移率。

针对16种金属，三种非金属以及离子PO43-和NH4 +，评估了沉积物释放对特拉弗河总预算的贡献。为了考虑不受干扰的条件和沉积物再悬浮，通过顺序萃取和悬浮反应器实验对原位基于透析液和异位抽吸的孔隙水采样进行了补充。在代表研究区域的被调查沉积物中，尽管有一些较高的污染点，但不同地球化学部分之间的金属（金属）分配却非常相似。孔隙水调查强调分析和基于窥探器的分析具有可比性，并表明沉积物生物体暴露于高浓度的金属（金属）中。然而，与作为背景参考的沉积物相比，受污染的沉积物没有更高的毒性。在重悬过程中，只有很少的金属（胶体）超过了规定的指导值。每吨悬浮泥沙的最大释放量仅为特拉夫河平均日负荷的10-5％至10-1％。总的来说，研究区域中“最原始的沉积物”而不是潜在危险的物质受到最高关注。结果支持要求更好地将分馏和形态要求纳入沉积物的法律评估中。每吨悬浮泥沙仅占特拉夫河日平均负荷的10-5％至10-1％。总的来说，研究区域中“最原始的沉积物”而不是潜在危险的物质受到最高关注。结果支持要求更好地将分馏和形态要求纳入沉积物的法律评估中。每吨悬浮泥沙仅占特拉夫河日平均负荷的10-5％至10-1％。总的来说，研究区域中“最原始的沉积物”而不是潜在危险的物质受到最高关注。结果支持要求更好地将分馏和形态要求纳入沉积物的法律评估中。

更新日期：2020-03-20

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