Author:
Romano D.,Magazù S.,Sabatino G.,Di Bella M.,Tripodo A.,Nania G.,Gattuso A.,Italiano F.
Abstract
Abstract
This paper presents analyses of 222Rn activity
concentration performed on groundwater samples collected from wells
and natural springs in 70 different sites of the crystalline area of
north-eastern Sicily (southern Italy), up to now poorly
studied. Alpha spectroscopy of the short-lived radon progeny was
used to measure the 222Rn activity concentration by means of
the Durridge RAD7 + H2O setup. Radon concentrations were
derived to be in the range of 1.6–57.5 Bq L-1. The higher
values were detected along fluvial valleys and in the crystalline
reliefs, whereas aquifers hosted in the alluvial plains show lower
radon concentrations. The annual effective dose due to intake of
radon by ingestion ranges from 4 to 146.8 μSv y-1. The
average value (56.5 μSv y-1) is below the recommended
limit of 100 μSv y-1 proposed by the World Health
Organization (WHO). In addition, all the measured radon values are
lower than the reference level of 100 Bq L-1 set by the
Italian legislative decree 28/2016 and by the European Directive
2013/51/Euratom. Therefore, all sampling sites are fully compliant
with the legislative requirements in terms of radon
levels. Moreover, results show that the radon levels measured in
groundwater from north-eastern Sicily are similar to those
determined for the adjacent area of southern Calabria, promoting the
assumption of a uniform radon signature in the crystalline domain of
southern Italy. However, further studies are needed to define better
the role of tectonic activity on the content of dissolved radon in
groundwater.
Subject
Mathematical Physics,Instrumentation
Cited by
3 articles.
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