MEASUREMENT OF RADIOACTIVITY IN WATER AND SEDIMENTS OF RIVER YOBE, NORTH EASTERN NIGERIA.
MEASUREMENT OF RADIOACTIVITY IN WATER AND SEDIMENTS OF RIVER YOBE, NORTH EASTERN NIGERIA.
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Date
2013-05
Authors
Abba, Habu Tela
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Abstract
Radioactivity measurement was carried out in water and sediments of river Yobe. Sediment
samples collected from areas of high fishing, farming, domestic/livestock and control area along
the river were analyzed using gamma-ray spectrometric technique. The average absorbed dose
rate of the samples was 50.00nGyh-1, 64.10nGyh-1, 46.79nGyh-1 and 40.12nGyh-1 for fishing,
farming, domestic/livestock and control zone respectively. Mean dose rate equivalent, external
and internal indices were also computed. The water samples were analyzed for gross alpha and
beta activity with an average values of 0.153±0.06, 0.638±0.06, 0.207±0.04 and 0.207±0.07
BqL-1 for gross alpha and 0.245±0.02, 0.679±0.05, 0.393±0.03 and 0.293±0.05 BqL-1 for gross
beta for the zones respectively. The overall results showed that activity concentrations of all
zones are within the typical world average values of 0.5Bq/L and 1Bq/L for alpha and beta
respectively, although some extreme values are obtained in the farming zone. Therefore the river,
have no significance radiological health burden on the environment and the populace.
Description
A Thesis submitted to the postgraduate school,
Ahmadu Bello University Zaria
In partial fulfilment for the award of the degree
Master of Science (Radiation Biophysics)
Keywords
MEASUREMENT, RADIOACTIVITY, WATER, SEDIMENTS, RIVER, YOBE, NORTH EASTERN, NIGERIA.