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| Titel |
Mercury dispersion in soils of an abandoned lead-zinc-silver mine, San Quintín (Spain) |
| VerfasserIn |
José Maria Esbrí, T. Martín-Crespo, D. Gómez-Ortiz, C. I. Monescillo, S. Lorenzo, P. Higueras |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250044835
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| Zusammenfassung |
| The mine considered on this work, namely San Quintín, is a filonian field with hydrothermal
ores exploited during almost fifty years (1887-1934), producing 550.000Tm of galena,
550Tm of silver and 5.000 of sphalerite. Some rewashing works of tailings muds was
achieved in recent times (1973-1985), including flotation tests of cinnabar ore from
Almadén mines. The main problems remaining on the site are an active acid mine
drainage (with pH ~ 2) and heavy metal dispersion on soils including gaseous mercury
emissions.
We present here results of a survey including soils sampling with mercury analysis and
other pedological parameters, as well as determinations of mercury inmission in the
atmosphere, using a common sampling grid. Analysis of soils samples has been carried
out using an atomic absorption spectrometer AMA254, while air determinations
were made by the same technique, using a Lumex RA-915+. The maps have been
obtained by means of SURFER 8 software, as well as by ArcGIS software, and puts
forward dispersion of mercury from cinnabar ore dump (108 μg-
g-1) to nearby soils
(0.3 μg-
g-1 at 700 m of distance). The dispersion of mercury vapor exceed WHO
level for chronic exposure (200 ng-
m-3) in a small area (250 meters from cinnabar
dump). |
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