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Catchment Soil Properties Affect Metal(loid) Enrichment in Reservoir Sediments of German Low Mountain Regions

Hahn, Jens ; Bui, Thanh ; Kessler, Mathias ; Weber, Collin J. ; Beier, Thomas ; Mildenberger, Antje ; Traub, Martina ; Opp, Christian (2022):
Catchment Soil Properties Affect Metal(loid) Enrichment in Reservoir Sediments of German Low Mountain Regions. (Publisher's Version)
In: Applied Sciences, 12 (5), MDPI, ISSN 2076-3417,
DOI: 10.26083/tuprints-00022526,
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Item Type: Article
Origin: Secondary publication service
Status: Publisher's Version
Title: Catchment Soil Properties Affect Metal(loid) Enrichment in Reservoir Sediments of German Low Mountain Regions
Language: English
Abstract:

Sediment management is a fundamental part of reservoir operation, but it is often complicated by metal(loid) enrichment in sediments. Knowledge concerning the sources of potential contaminants is therefore of important significance. To address this issue, the concentrations and the mobile fractions of metal(loid)s were determined in the sediments and the respective catchment areas of six reservoirs. The results indicate that reservoirs generally have a high potential for contaminated sediment accumulation due to preferential deposition of fine particles. The median values of the element-specific enrichment factor (EF) demonstrates slight enrichments of arsenic (EF: 3.4), chromium (EF: 2.8), and vanadium (EF: 2.9) for reservoir sediments. The enrichments of cadmium (EF: 8.2), manganese (EF: 3.9), nickel (EF: 4.8), and zinc (EF: 5.0) are significantly higher. This is enabled by a diffuse element release from the soils into the impounded streams, which is particularly favored by soil acidity. Leaching from the catchment soils partially enriches elements in stream sediments before their fine-grained portions in particular are deposited as reservoir sediment. We assume that this effect is of high relevance especially for reservoirs impounding small streams with forested catchments and weakly acid buffering parent material of soil formation.

Journal or Publication Title: Applied Sciences
Volume of the journal: 12
Issue Number: 5
Place of Publication: Darmstadt
Publisher: MDPI
Collation: 15 Seiten
Uncontrolled Keywords: reservoir, soil, catchment, sediment, metals, trace elements, enrichment, element mobility
Classification DDC: 500 Naturwissenschaften und Mathematik > 550 Geowissenschaften
Divisions: 11 Department of Materials and Earth Sciences > Earth Science > Department of Soil Mineralogy and Soil Chemistry
Date Deposited: 10 Nov 2022 13:09
Last Modified: 10 Nov 2022 13:09
DOI: 10.26083/tuprints-00022526
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-225260
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/22526
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