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• W2804260143 abstract "The present study evaluated the content and distribution of several trace elements (Li, Be, Al, V, Cr, Co, Ni, Cu, Zn, Se, Mo, Ag, Cd, Sb, Ba, Tl, Pb, and U) in the Douro River estuary. For that, three matrices were collected (water, sediments and native local flora) to assess the extent of contamination by these elements in this estuarine ecosystem. Results showed their occurrence in estuarine water and sediments, but significant differences were recorded on the concentration levels and pattern of distribution among both matrices and sampling points. Generally, the levels of trace elements were higher in the sediments than in the respective estuarine water. Nonetheless, no correlation among trace elements was determined between water and sediments, except for Cd. Al was the trace element found at highest concentration at both sediments and water followed by Zn. Pollution indices such as geo-accumulation (Igeo), enrichment factor (EF) and contamination factor (CF) were determined to understand the levels and sources of trace elements pollution. Igeo showed strong contamination by anthropogenic activities for Li, Al, V, Cr, Ni, Cu, Zn, Ba and Pb at all sampling points while EF and CF demonstrated severe enrichment and contamination by Se, Sb and Pb. Levels of trace elements were compared to acceptable values for aquatic organisms and Sediment Quality Guidelines. The concentration of some trace elements, namely Al, Pb and Cu, were higher than those considered acceptable, with potential negative impact on local living organisms. Nevertheless, permissible values for all trace elements are still not available, demonstrating that further studies are needed in order to have a complete assessment of environmental risk. Furthermore, the occurrence and possible accumulation of trace elements by local plant species and macroalgae were investigated as well as their potential use as bioindicators of local pollution and for phytoremediation purposes." @default.
• W2804260143 created "2018-06-01" @default.
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• W2804260143 date "2018-10-01" @default.
• W2804260143 modified "2023-10-17" @default.
• W2804260143 title "Distribution and environmental assessment of trace elements contamination of water, sediments and flora from Douro River estuary, Portugal" @default.
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• W2804260143 doi "https://doi.org/10.1016/j.scitotenv.2018.05.234" @default.
• W2804260143 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/29929302" @default.
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