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• W2910905384 abstract "Toxic metals in the sediments of the Three Gorges Reservoir (TGR) in China are a conspicuous scientific issue. However, compared with the commonly monitored metals, the geochemical behavior and potential risk of antimony (Sb) in TGR sediments remains unclear. Here, sediment samples were collected from the entire TGR. Multiple assessment approaches (i.e., geochemical baseline concentration of Sb (GBCSb), grain size normalization, potential ecological risk, and health risk assessment) were used to evaluate the Sb status in sediments. The average Sb concentration was 1.14 ± 0.20 mg/kg, ranging from 1.10 to 1.19 mg/kg. The spatial distribution of Sb exhibited a tendency to accumulate from upstream to downstream. Normalization by fine grain size revealed that fine grain particles mainly influenced the Sb spatial distribution in TGR sediments. The temporal variation of Sb revealed that the mean content of Sb was higher in the dry season than in the wet season. Moreover, GBCSb (1.10 mg/kg) was higher than the background value of Sb in Yangtze River sediments. Determination of the anthropogenic contribution rate gave a mean value of 11.43% using the GBC model, indicating that the main contribution of Sb in TGR sediments originated from natural sources. According to sediment loads during 2015 and 2016, the anthropogenic input deposited 2.74 and 3.32 t of sediments in 2015 and 2016, respectively. In addition, the assessment results of the potential ecological risk index based on GBCSb suggested that Sb presented a low ecological risk in TGR sediments. Sb accumulation in fish caused by the sediment resuspension was calculated by the environmental impact assessment model. Further assessment of target hazard quotients demonstrated that Sb was at a safe level for fish consumption." @default.
• W2910905384 created "2019-01-25" @default.
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• W2910905384 date "2019-04-01" @default.
• W2910905384 modified "2023-10-03" @default.
• W2910905384 title "Geochemical and health risk assessments of antimony (Sb) in sediments of the Three Gorges Reservoir in China" @default.
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• W2910905384 doi "https://doi.org/10.1016/j.scitotenv.2019.01.014" @default.
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