公用水库沉积物中重金属和放射性核素含量对环境和放射性健康危害的评估

Q4 Business, Management and Accounting

International Journal of Environment and Health Pub Date : 2017-08-31 DOI:10.1504/IJENVH.2017.10007150

O. M. Isinkaye, J. I. Agbi, Y. Ajiboye, R. Obasi

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引用次数: 0

摘要

利用x射线荧光和γ射线光谱技术测量了尼日利亚Ondo州Awara和Osse水库沉积物中的重金属和天然放射性核素。两个储层中检测到的重金属有K、Ca、Ti、V、Cr、Mn、Fe、Ni、Cu、Zn、As、Ba、Pb和Th。阿瓦拉坝沉积物中重金属和微量元素的平均含量为Fe>K>Ca>Mn>Ti> Sr>Cr>V>Rb>Zn>Ni>Cu, Osse坝沉积物中重金属和微量元素的平均含量为Ba>K>Fe>Ca> Mn>Sr>Ti>V>Rb>Cr>Zn>Ni>Th>Pb>Cu。对两个储层的潜在毒性重金属含量进行地聚集指数和富集因子评价，表明两个储层均未受到有害重金属的污染。在两个储层中检测到的天然放射性核素(40K和232Th)高于其地壳平均值，而226Ra低于世界地壳平均值。这两个水库的沉积物几乎没有或根本没有生态或辐射风险。

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Assessment of environmental and radiological health hazards due to heavy metals and radionuclides contents in utility water reservoirs' sediments

Heavy metals and natural radionuclides in sediments of Awara and Osse reservoirs, Ondo State, Nigeria have been measured using X-ray fluorescence and γ-ray spectrometry techniques. Heavy metals detected in the two reservoirs include K, Ca, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, As, Ba, Pb and Th. The average concentrations of the measured heavy and trace metals in the sediment of Awara dam vary as Fe>K>Ca>Mn>Ti> Sr>Cr>V>Rb>Zn>Ni>Cu while those of Osse dam vary as Ba>K>Fe>Ca> Mn>Sr>Ti>V>Rb>Cr>Zn>Ni>Th>Pb>Cu. Geoaccumulation index and enrichment factor evaluation of potentially toxic heavy metal contents in both reservoirs revealed that the two reservoirs are uncontaminated with hazardous heavy metals. Naturally occurring radionuclides (40K and 232Th) detected in the two reservoirs show values that are higher than their mean crustal value, while 226Ra is lower than the world mean crustal value. There is little or no ecological or radiological risk associated with the sediment of the two reservoirs.

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来源期刊

International Journal of Environment and Health Business, Management and Accounting-Business, Management and Accounting (all)

CiteScore

0.30

自引率

0.00%

发文量

期刊介绍： The IJEnvH is a fully-refereed scientific journal that provides an international forum for the exchange of information and the advancement of knowledge in the multidisciplinary field of Environment and Health. The aim of the IJEnvH is to stimulate the discussion and communication among scientists, researchers and experts with different background and expertise, involved, at different levels, with the study of environment and health problems.