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Authors: D'Alessandro, W.*
Vita, F.*
Title: Groundwater radon measurements in the Mt. Etna area
Title of journal: Journal of Environmental Radioactivity
Series/Report no.: 65(2003)
Publisher: Elsevier
Issue Date: 2003
DOI: 10.1016/S0265-931X(02)00096-6
Keywords: Groundwater
Mount Etna
Active volcanic areas
Abstract: Radon levels were measured in 119 groundwater samples collected throughout the active volcanic area of Mt. Etna by means of a portable Lucas-type scintillation chamber. The measured activity values range from 1.8 to 52.7 Bq l 1. About 40% of the samples exceed the maximum contaminant level of 11 Bq l 1 proposed by the USEPA in 1991. The highest radon levels are measured in the eastern sector of the volcano, which is the seismically most active zone of the volcano. On the contrary the south-western sector, which is both seismically active and a site of intense magmatic degassing, display lower radon levels. This is probably due to the formation of a free gas phase (oversaturation of CO2) that strips the radon from the water. Comparison of the data gathered at Mt. Etna with those of other areas indicates that 222Rn activity in groundwater is positively correlated with both the content of parent elements in the aquifer rocks and the temperature of the geothermal systems that interacts with the sampled aquifers.
Appears in Collections:03.02.06. Water resources
05.08.01. Environmental risk
03.04.07. Radioactivity and isotopes
04.08.06. Volcano monitoring
03.02.03. Groundwater processes
03.04.03. Chemistry of waters
Papers Published / Papers in press

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