Journal of Radioanalytical and Nuclear Chemistry
Volume/Issue:
Volume 77: Issue 1
Thorium series disequilibrium and geochemical processes in estuarine sediments of Mandovi river
Authors:
L. Joshi Bhabha Atomic Research Centre Air Monitoring Section 400 085 Bombay (India)

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,
M. Zingde National Institute of Oceanography Bombay Regional Centre Versova 400 061 Bombay (India)

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, and
S. Abidi National Institute of Oceanography Bombay Regional Centre Versova 400 061 Bombay (India)

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Pages:
57–64
Online Publication Date:
09 Jan 2007
Publication Date:
01 Mar 1983
Article Category:
Research Article
DOI:
https://doi.org/10.1007/bf02525353
Restricted access

Abstract  

The measurements of natural radioactivity due to thorium isotopes have been carried out in estuarine sediments of Mandovi river (Goa). The geochemical behaviour of these sediments has been studied by leaching the samples with 5 % ethylenediaminetetraacetic acid at pH 3.0 in order to investigate the processes occurring on the surface of the sediment particles and the distribution of natural thorium in estuarine sediments. The228Th/232Th activity ratios have been found to be in the range of 2.00 to 2.12. This anomaly between232Th and228Th has been attributed to the preferential leaching of228Ra by water flowing over these sediments. The activities of228Ra on the surface labile layers of the sediments have also been determined. The230Th/232Th activity ratios have been found to be in the range of 0.94 to 1.04. These ratios are mainly dependent on the precipitation action of230Th on adjacent sediments.

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Cover Journal of Radioanalytical and Nuclear Chemistry
Journal of Radioanalytical and Nuclear Chemistry
Print ISSN:
0236-5731
Online ISSN:
1588-2780

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation		 1968
Volumes
per Year		 1
Issues
per Year		 12
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)

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