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| Format: | Artículo científico |
| Language: | en |
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Universidad Autónoma de Baja California
1999
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| Online Access: | https://www.redalyc.org/articulo.oa?id=48025201 |
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| _version_ | 1866814279325319168 |
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| author | V. Sáenz |
| author_facet | V. Sáenz |
| contents | Thallium in the marine environment: first ecotoxicological assessments in the guadalquivir estuary and its potential adverse effect on the doñana european natural reserve after the... V. Sáenz A.M. Arias J. Blasco T. A. DelValls Ciencias de la Tierra Doñana thallium bioaccumulation Guadalquivir estuary field sediment toxicity Thallium (Tl) is an extremely toxic but little-studied element in the marine environment andpractically no information has been reported on the levels of Tl in marine organisms. After theAznalcóllar mining spill (April 1998), high levels of metals were put into the environment. This acidcontaminatedmedium was responsible for the initial pollution effects measured in the Guadiamar River,which is an affluent of the Guadalquivir River and very close to the biggest natural reserve in Europe(Doñana). Four different species were used in the monitoring from April to September 1998 and asediment field bioassay to check bioacumulation was performed. We present the first ecotoxicologicalevaluation of the mining spill in the Guadalquivir River, with reference to Tl, a little-known metal. Also,Pb and Cd data were compared to Tl during field sediment testing. Results show low levels of this metalin all of the organisms studied and they do not show any increase in the level of this metal, ranging from40 to 90 ng g-1, 80 to 210 ng g-1, 15 to 98 ng g-1 and 75 to 125 whole body dry weight for Scrobiculariaplana, Liza ramada (muscle), Crassostrea angulata and Uca tangeri, respectively. These are the firstfield data of Tl concentration measured using estuarine organisms. Field sediment toxicity test results confirm those obtained during the monitoring: Tl is not bioaccumulated by the organisms (C. angulata)used in the test. The sequence in bioaccumulation of metals was Cd > Pb > Tl. Both studies,bioaccumulation and sediment toxicity, should be maintained during the next few years to really evaluatethe potential effect of the mining spill on the ecosystem and society 1999 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48025201 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.2 Vol.25 |
| format | Artículo científico |
| id | redalyc_48025201 |
| language | en |
| publishDate | 1999 |
| publisher | Universidad Autónoma de Baja California |
| spellingShingle | Thallium in the marine environment: first ecotoxicological assessments in the guadalquivir estuary and its potential adverse effect on the doñana european natural reserve after the... V. Sáenz Ciencias de la Tierra Doñana thallium bioaccumulation Guadalquivir estuary field sediment toxicity Thallium in the marine environment: first ecotoxicological assessments in the guadalquivir estuary and its potential adverse effect on the doñana european natural reserve after the... V. Sáenz A.M. Arias J. Blasco T. A. DelValls Ciencias de la Tierra Doñana thallium bioaccumulation Guadalquivir estuary field sediment toxicity Thallium (Tl) is an extremely toxic but little-studied element in the marine environment andpractically no information has been reported on the levels of Tl in marine organisms. After theAznalcóllar mining spill (April 1998), high levels of metals were put into the environment. This acidcontaminatedmedium was responsible for the initial pollution effects measured in the Guadiamar River,which is an affluent of the Guadalquivir River and very close to the biggest natural reserve in Europe(Doñana). Four different species were used in the monitoring from April to September 1998 and asediment field bioassay to check bioacumulation was performed. We present the first ecotoxicologicalevaluation of the mining spill in the Guadalquivir River, with reference to Tl, a little-known metal. Also,Pb and Cd data were compared to Tl during field sediment testing. Results show low levels of this metalin all of the organisms studied and they do not show any increase in the level of this metal, ranging from40 to 90 ng g-1, 80 to 210 ng g-1, 15 to 98 ng g-1 and 75 to 125 whole body dry weight for Scrobiculariaplana, Liza ramada (muscle), Crassostrea angulata and Uca tangeri, respectively. These are the firstfield data of Tl concentration measured using estuarine organisms. Field sediment toxicity test results confirm those obtained during the monitoring: Tl is not bioaccumulated by the organisms (C. angulata)used in the test. The sequence in bioaccumulation of metals was Cd > Pb > Tl. Both studies,bioaccumulation and sediment toxicity, should be maintained during the next few years to really evaluatethe potential effect of the mining spill on the ecosystem and society 1999 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48025201 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.2 Vol.25 |
| title | Thallium in the marine environment: first ecotoxicological assessments in the guadalquivir estuary and its potential adverse effect on the doñana european natural reserve after the... |
| topic | Ciencias de la Tierra Doñana thallium bioaccumulation Guadalquivir estuary field sediment toxicity |
| url | https://www.redalyc.org/articulo.oa?id=48025201 |