Hidden ecological risks in reservoir sediments: grain-size dependent enrichment of toxic metals in the black sea basin
Koray Özşeker, Yahya Terzi, Coşkun Erüz, Neira Purwanty Ismail · 2026
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Description
Koray Özşeker and colleagues at Karadeniz Technical University studied toxic metals in reservoir sediments in northeastern Türkiye, publishing their findings in Environmental Geochemistry and Health in 2026. They took samples of the top sediment layer in three dam reservoirs: Borçka, Deriner, and Torul. Rather than testing each sample as one bulk mix, they split it into four grain-size fractions and measured five metals in each.
The finest particles held by far the most metal, with copper, lead, and zinc passing sediment safety thresholds in several cases. Levels fell steadily as grain size grew, and autumn samples ran higher than spring ones. Borçka was the most contaminated reservoir, a pattern the authors link to mining inputs nearby. They argue that bulk testing can miss these fine-grain hotspots, so risk checks should treat each fraction separately.
Catalog record
| CREATOR | Koray Özşeker, Yahya Terzi, Coşkun Erüz, Neira Purwanty Ismail |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 70 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |