NDLI: Relation between "terra rossa" from the Apulia aquifer of Italy and the radon content of groundwater: Experimental results and their applicability to radon occurrence in the aquifer

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Relation between "terra rossa" from the Apulia aquifer of Italy and the radon content of groundwater: Experimental results and their applicability to radon occurrence in the aquifer

Hydrogeology Journal : Volume 6, Issue 2, August 1998

Hydrogeology Journal : Volume 6, Issue 1, June 1998

Hydrogeology Journal : Volume 5

Relation between "terra rossa" from the Apulia aquifer of Italy and the radon content of groundwater: Experimental results and their applicability to radon occurrence in the aquifer

Content Provider	Springer Nature Link
Author	Tadolini, T. Spizzico, M.
Copyright Year	1998
Abstract	The radon-222 ($^{222}$Rn) activity in groundwater of the Apulian karstic aquifer in southern Italy is as great as 500 Becquerel per liter (Bq/L) locally. Normal radium-226 ($^{226}$Ra) activity in the limestone and calcareous dolomites of the aquifer is not enough to explain such a high level. Laboratory investigations identified high $^{226}$Ra activity in the "terra rossa," the residuum occupying fissures and cavities in the bedrock, and also the relation between (1) $^{226}$Ra-bearing bedrock and "terra rossa" and (2) $^{222}$Rn in water. The "terra rossa" is the primary source of the radon in the groundwater. The experimental results show the need to characterize the "terra rossa" of Apulia on the basis of $^{226}$Ra activity and also to study the distribution and variations in $^{222}$Rn activity over time in the aquifer. L'activité du radon-222 ($^{222}$Rn) dans les eaux souterraines de l'aquifère karstique des Pouilles, dans le sud de l'Italie, atteint localement 500 Becquerel par litre (Bq/L). L'activité normale du radium-226 ($^{226}$Ra) dans les calcaires et dans les calcaires dolomitiques de l'aquifère n'est pas assez élevée pour expliquer des valeurs aussi élevées. Des analyses de laboratoire ont mis en évidence une forte activité en $^{226}$Ra dans la terra rossa, remplissage de fissures et de cavités de la roche, ainsi qu'une relation entre (1) la roche et la terra rossa contenant du $^{226}$Ra et (2) le $^{222}$Rn dans l'eau. La terra rossa est la source primaire de radon dans l'eau souterraine. Les résultats expérimentaux montrent qu'il est nécessaire de caractériser la terra rossa des Pouilles par son activité en $^{226}$Ra et d'étudier la distribution et les variations de l'activité en $^{222}$Rn au cours du temps dans l'aquifère. La actividad del radon-222 ($^{222}$Rn) en el agua subterránea del acuífero cárstico de Apulia, al sur de Italia, alcanza localmente los 500 Bq/L. La actividad normal del radio-226 ($^{226}$Ra) en las calcitas y dolomitas del acuífero no es suficiente para explicar estos niveles tan altos. Las investigaciones de laboratorio han identificado alta actividad de $^{226}$Ra en la "terra rossa", el material que rellena las fisuras y cavidades de la matriz rocosa, y han identificado también la relación entre (1) el $^{226}$Ra presente en la roca portante y la "terra rossa" y (2) el contenido de $^{222}$Rn en el agua. La "terra rossa" es, pues, la fuente principal de radón en las aguas subterráneas. Los resultados experimentales muestran la necesidad de caracterizar la "terra rossa" de Apulia sobre la base de la actividad de $^{226}$Ra, así como de estudiar la distribución y las variaciones en la actividad del $^{222}$Rn en el acuífero a lo largo del tiempo.
Starting Page	450
Ending Page	454
Page Count	5
File Format	PDF
ISSN	14312174
Journal	Hydrogeology Journal
Volume Number	6
Issue Number	3
e-ISSN	14350157
Language	English
Publisher	Springer-Verlag
Publisher Date	1998-10-21
Publisher Institution	International Association of Hydrogeologists
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Water Science and Technology

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