Assessment of Radionuclide Concentrations in Oil Producing Communities in Bayelsa West Senatorial District, Bayelsa State, Nigeria

Okevwemeke Moses Oghenerukevwe, Gregory O. Avwiri, Ezekiel O. Agbalaga
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Abstract

An assessment of radionuclide concentration in oil producing areas in Bayelsa West Senatorial District, Bayelsa State have been evaluated. In this study, a total of twenty five (25) soil, samples were collected for laboratory analysis. The survey was achieved using a factory calibrated Gamma Scout radiation meter and a Gamma Spectroscopy with Sodium Iodide (NA(TI) Detector used for counting and detection of radionuclide contentration of all samples. The results obtained in the study showed that the average concentrations for 40 K, 238 U and 232 Th in soil samples are valued at 520.888 ± 134.119 ???? ?1 , 18.495 ± 4.983 ???? ?1 and 11.463 ± 2.472 ???? ?1 respectively. The ?? ?? has an average value of 74.675 ± 16.934 ???? ?1 . The ? ?? has an average value of 0.21 ± 0.049 while the average value of ? ?? is 0.26 ± 0.064 which falls below the permissible level. The absorbed dose rate (D) due to 40 K, 238 U and 232 Th in soil samples has an average of 37.23 ± 8.692 ???? ?1 . This was also below the world average of 60???? ?1 . Annual effective dose equivalent (AEDE) has an average value of 45.66 ± 10.654 µ??? ?1 . This was also below the world average value. Annual Gonadal Equivalent Dose (AGED) and Representative Gamma Index (? ? ) were valued at 269.13 ± 63.095 ???? ?1 and 0.59 ± 0.117 respectively. Generally, the obtained value of 40 K was higher than the permissible level while 238 U and 232 Th where lower than the recommended standard value of 400 ???? ?1 , 33 ???? ?1 and 35 ???? ?1 (UNSCEAR, 2000). Therefore, the use of the soil for industrial and domestic poses no radiological threat to human health.
尼日利亚巴耶尔萨州巴耶尔萨西参议院区产油社区放射性核素浓度评估
对巴耶尔萨州巴耶尔萨西参议院区产油区的放射性核素浓度进行了评价。在本研究中,共收集了二十五(25)个土壤样品进行实验室分析。该调查是使用工厂校准的Gamma Scout辐射计和Gamma能谱仪实现的,该能谱仪带有用于计数和检测所有样品的放射性核素浓度的碘化钠(NA(TI)检测器。研究结果表明,土壤样品中40 K、238 U和232 Th的平均浓度为520.888±134.119 ????? 1,18.495±4.983 ?????1和11.463±2.472 ????分别? 1。的? ??? 平均值为74.675±16.934 ????? 1。的吗??? 平均值为0.21±0.049,平均值为??? 为0.26±0.064,低于允许水平。40 K、238 U和232 Th在土壤样品中的吸收剂量率(D)平均值为37.23±8.692 ????? 1。这也低于60人的世界平均水平????? 1。年有效剂量当量(AEDE)平均值为45.66±10.654µ??? 1。这也低于世界平均水平。年性腺当量剂量(AGED)和代表性γ指数(??)值为269.13±63.095 ?????1和0.59±0.117。一般来说,40 K的所得值高于允许值,238 U和232 Th低于400 ????的推荐标准值? 1,33 ?????1和35 ????1 (unscear, 2000)。因此,将土壤用于工业和家庭对人类健康不构成放射性威胁。
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