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• W3090366986 startingPage "115734" @default.
• W3090366986 abstract "Sediment serves as a sink for metals, thus it is critical to assess its contamination and associated risk. A typical riparian wetland close to a Zn-smelting operation in karst areas in southwest China was investigated. Sediment and reed plant (Phragmites australis) samples from wet and dry seasons were analyzed for total As, Cu, and Zn concentrations. Metal pollution in the sediment was assessed based on geoaccumulation index (Igeo). Further, metals in the sediment were fractionated into exchangeable, water and acid-soluble, reducible, oxidizable, and residual fractions based on the BCR sequential extraction. The results showed that the As, Cu, and Zn concentrations in the sediment were significantly higher than the background values (740–4081, 96–228, and 869–3331 vs. 10, 22, and 70 mg kg−1). With the Igeo being 10–17, the data indicate that the sediment was highly-polluted. While total As, Cu and Zn in the sediment increased from dry to wet season, their available concentrations decreased except Cu. With 62–94% of As, Cu, and Zn being in the residual fraction, metal availability in the sediment was low based on fractionation data. The data are consistent with low metal uptake by reed as their concentration ratios in plant roots to the sediment were 0.01–0.32. The results suggest that the riparian sediment was highly-polluted with As, Cu and Zn, but showing low metal availability and limited plant uptake." @default.
• W3090366986 created "2020-10-08" @default.
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• W3090366986 date "2021-01-01" @default.
• W3090366986 modified "2023-10-16" @default.
• W3090366986 title "Sequential fractionation and plant uptake of As, Cu, and Zn in a contaminated riparian wetland" @default.
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• W3090366986 doi "https://doi.org/10.1016/j.envpol.2020.115734" @default.
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• W3090366986 hasPublicationYear "2021" @default.
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