Gross α and β Activity Concentration and Estimation of Adults and Infants Dose intake in Surface and Ground Water of Ten Oil Fields Environment in Western Niger Delta of Nigeria

Journal of Applied Sciences and Environmental Management

AGBALAGBA, EZEKIEL O.¹  AVWIRI, GREGORY O.¹  CHADUMOREN, YEHUWDAH E.¹ 

关键词: Gross alpha;    gross beta;    activity concentration;    dose intake;    oil field radioactivity;   

DOI  :  

学科分类：环境科学（综合）

来源: University of Port Harcourt * Department of Pure and Industrial Chemistry

【 摘 要 】

The oil and gas rich Niger Delta region of Nigeria is characterized byenvironmental degradation leading to environmental pollution from oil and gas activities.This study examined the gross α and β activity in thirty (river/stream, well and tap) watersamples collected from ten oil fields in the Western Niger Delta region of Nigeria. Thecounting system employed in this analysis is the Gas-flow proportional counter {EurisysMeasure IN20 low- background multiple (eight) channel counter}. Gross alpha activityconcentration range from 0.01±0.002 to 0.7±0.01 (0.15±0.003) Bql-1, 0.01±0.003 to0.5±0.01 (0.1±0.003)Bql-1 and 0.02±0.001 to 35.1±1.1 (4.1±0.1) Bql-1 while beta activityconcentration ranged from 1.1±0.04 to 13.2±0.1 (6.0±0.1) Bql-1, 0.7±0.1 to 54.7±1.3(8.9±0.2)Bql-1 and 0.7±0.03 to 151.2±1.8 (40.1±0.9)Bql-1 for well, tap and river watersrespectively. Correlation value between α and β activities in well, tap and river water is0.025, 0.047 and 0.512 respectively. The results show that except for the alpha activity inthe tap water samples, the average natural activity concentrations of α- and β-emittingradionuclides in the samples are slightly above the WHO recommended limit. For allsamples the gross β activities are higher than the corresponding gross α activities. The meaneffective equivalent dose intake per year due to alpha activity in the water samples foradults and infants are: 76.4±1.8 and 20.9±55μSvy-1, 54.6±1.3 and 14.9±0.4μSvy-1, and2118±70 and 584±19.2μSvy-1 in well, tap, and river water samples respectively. The resultsobtained for dose intake are below the WHO recommended reference level of 0.1mSvy-1,except for the water sample from Uzere river. This study indicates that the water sourcesevaluated, especially the rivers, are contaminated radiologically. @JASEM

【 授权许可】

Unknown