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| Titel |
Use of bioassays for testing soils and/or sediments contaminated by mining activities |
| VerfasserIn |
C. Pérez-Sirvent, M. J. Martínez-Sánchez, M. L. García-Lorenzo, J. Molina |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250022335
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| Zusammenfassung |
| Ecotoxicity tests measure the bioavailability of the contaminants and the effects of the
chemically not measured toxic compounds on the members of the soil community. Therefore,
ecotoxicological testing may be a useful approach for assessing the toxicity as a complement
to chemical analysis. They are solid phase tests based on terrestrial methods and tests
performed on water extracts using aquatic test protocols. The extent and degree of heavy
metal contamination around mines may vary depending on geochemical characteristics, the
mineralization of tailings, physico-chemical conditions and the processes used to extract
metals.
Portman Bay was subject to mining from the time of the Roman Empire to 1991 when the
activity ceased. Since 1957, the wastes from mining operations were discharged directly
into the sea. These wastes mainly consisted of clay, quartz, siderite, magnetite,
remains of sphalerite, pyrite and galena and residues of the chemical reagents used in
floatation.
In our study two methods of environmental toxicological tests were compared and applied
to sediments of the Portman Bay (SE, Spain): the standardized toxicological test based on
inhibition of luminescence employing Microtox |
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