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- Title
Distribution of PCDD/Fs and dioxin-like PCBs in sediment and plants from a contaminated salt marsh (Tejo estuary, Portugal).
- Authors
Nunes, Margarida; Vernisseau, Anaïs; Marchand, Philippe; Bizec, Bruno; Ramos, Fernando; Pardal, Miguel
- Abstract
Concentrations and profiles of 2,3,7,8-substituted polychlorinated dibenzo- p-dioxins, polychlorinated dibenzofurans (PCDD/Fs) and dioxin-like polychlorinated biphenyls (dl-PCBs) were investigated in sediment and plants collected from a salt marsh in the Tejo estuary, Portugal. The highest PCDD/F and dl-PCB concentrations were detected in uncolonized sediments, averaging 325.25 ± 57.55 pg g dry weight (dw) and 8,146.33 ± 2,142.14 pg g dw, respectively. The plants Sarcocornia perennis and Halimione portulacoides growing in PCDD/F and dl-PCB contaminated sediments accumulated contaminants in roots, stems, and leaves. It was observed that PCDD/F and dl-PCB concentrations in roots were significantly lower in comparison with stems and leaves. In general, concentration of ΣPCDD/Fs and Σdl-PCBs in H. portulacoides tissues were found to be twofold higher than those in S. perennis, indicating a difference in the accumulation capability of both species. Furthermore, congener profiles changed between sediments and plant tissues, reflecting a selective accumulation of low chlorinated PCDD/Fs and non- ortho dl-PCBs in plants.
- Subjects
TAGUS River (Spain &; Portugal); DIOXINS; POLYCHLORINATED biphenyls; SALT marshes; SOIL pollution; SEDIMENTS
- Publication
Environmental Science & Pollution Research, 2014, Vol 21, Issue 4, p2540
- ISSN
0944-1344
- Publication type
Article
- DOI
10.1007/s11356-013-2178-8