Evidence for concentration of anthropogenic mercury in salt marsh sediments
Sediment cores from two salt marshes, Rosário (Tagus estuary) and Laranjo (Ria de Aveiro), were analyzed for total Hg and Al, and for Fe and Mn extracted with a hydroxylamine-acetic acid solution. Both areas have been contaminated by industrial discharges during the last decades. Vertical distribut...
| Glavni autori: | , , , , , |
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| Format: | Članak |
| Jezik: | English |
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Universidad Autónoma de Baja California
2003-03-01
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| Serija: | Ciencias Marinas |
| Teme: | |
| Online pristup: | https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/171 |
| _version_ | 1827330905016893440 |
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| author | C Micaelo M Válega C Vale E Pereira A Duarte I Caçador |
| author_facet | C Micaelo M Válega C Vale E Pereira A Duarte I Caçador |
| author_sort | C Micaelo |
| collection | DOAJ |
| description |
Sediment cores from two salt marshes, Rosário (Tagus estuary) and Laranjo (Ria de Aveiro), were analyzed for total Hg and Al, and for Fe and Mn extracted with a hydroxylamine-acetic acid solution. Both areas have been contaminated by industrial discharges during the last decades. Vertical distributions of Hg in sediments colonized by Arthrocnemum fruticosum and Halimione portulacoides were compared to profiles in non-vegetated sediments. The same vertical distribution pattern was observed in all situations: Hg enriched in sediment layers with high root density. Mercury concentrations reached 9.3 and 29.1 nmol g–1 in Rosário, and 149.0 and 196.0 nmol g–1 in Laranjo. At both marshes, higher concentrations were found in sediments colonized by H. portulacoides. These values are one order of magnitude above the levels found in nonvegetated sediments. Mercury was enriched in sediment layers containing high concentrations of Fe extracted with a hydroxylamine-acetic acid solution, indicating the importance of Fe (and Mn) oxides formed in the rooting sediments for the retention of anthropogenic Hg.
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| first_indexed | 2024-03-07T16:25:14Z |
| format | Article |
| id | doaj.art-fb8344ec2f6e4a2cb89eb3e6acb9152d |
| institution | Directory Open Access Journal |
| issn | 0185-3880 2395-9053 |
| language | English |
| last_indexed | 2024-03-07T16:25:14Z |
| publishDate | 2003-03-01 |
| publisher | Universidad Autónoma de Baja California |
| record_format | Article |
| series | Ciencias Marinas |
| spelling | doaj.art-fb8344ec2f6e4a2cb89eb3e6acb9152d2024-03-03T19:17:20ZengUniversidad Autónoma de Baja CaliforniaCiencias Marinas0185-38802395-90532003-03-0129410.7773/cm.v29i4.171Evidence for concentration of anthropogenic mercury in salt marsh sedimentsC Micaelo0M Válega1C Vale2E Pereira3A Duarte4I Caçador5Instituto de Investigação das Pescas e do MarUniversidade de AveiroInstituto de Investigação das Pescas e do MarUniversidade de AveiroUniversidade de AveiroUniversidade de Lisboa Sediment cores from two salt marshes, Rosário (Tagus estuary) and Laranjo (Ria de Aveiro), were analyzed for total Hg and Al, and for Fe and Mn extracted with a hydroxylamine-acetic acid solution. Both areas have been contaminated by industrial discharges during the last decades. Vertical distributions of Hg in sediments colonized by Arthrocnemum fruticosum and Halimione portulacoides were compared to profiles in non-vegetated sediments. The same vertical distribution pattern was observed in all situations: Hg enriched in sediment layers with high root density. Mercury concentrations reached 9.3 and 29.1 nmol g–1 in Rosário, and 149.0 and 196.0 nmol g–1 in Laranjo. At both marshes, higher concentrations were found in sediments colonized by H. portulacoides. These values are one order of magnitude above the levels found in nonvegetated sediments. Mercury was enriched in sediment layers containing high concentrations of Fe extracted with a hydroxylamine-acetic acid solution, indicating the importance of Fe (and Mn) oxides formed in the rooting sediments for the retention of anthropogenic Hg. https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/171mercurysedimentsalt marsh |
| spellingShingle | C Micaelo M Válega C Vale E Pereira A Duarte I Caçador Evidence for concentration of anthropogenic mercury in salt marsh sediments Ciencias Marinas mercury sediment salt marsh |
| title | Evidence for concentration of anthropogenic mercury in salt marsh sediments |
| title_full | Evidence for concentration of anthropogenic mercury in salt marsh sediments |
| title_fullStr | Evidence for concentration of anthropogenic mercury in salt marsh sediments |
| title_full_unstemmed | Evidence for concentration of anthropogenic mercury in salt marsh sediments |
| title_short | Evidence for concentration of anthropogenic mercury in salt marsh sediments |
| title_sort | evidence for concentration of anthropogenic mercury in salt marsh sediments |
| topic | mercury sediment salt marsh |
| url | https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/171 |
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