尼日利亚西南部拉各斯Ifako-Ijaye地区地下水的放射性和元素评价

Q4 Medicine

International Journal of Low Radiation Pub Date : 2020-01-01 DOI:10.1504/IJLR.2020.10036044

S. Alausa, Bashiru O. Rabiu, N. Adebisi, A. Ibikunle, A. Taiwo, O. Olúbòmęhìn

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引用次数: 0

摘要

本研究在Ifako-Ijaiye采集了20个钻孔(BH)和15个手挖井(HD)水样。采用NaI (TI)检测器和BUCK200原子吸收光谱法对样品进行放射性分析。根据40K、238U和232Th的活性浓度计算有效剂量率(EDR)和过量终身癌症风险(ELCR)。活性与元素浓度具有统计学相关性。BH水中40K、238U和232Th的平均活度浓度分别为8.77±8.40 Bq/L、1.03±0.19 Bq/L和0.93±0.15 Bq/L;在HD水中分别为10.12±0.07 Bq/L、0.94±0.34 Bq/L和0.89±0.10 Bq/L。在这项研究中，婴儿的EDR和ELCR高于托儿所和成人。BH水中的元素浓度高于世界卫生组织(WHO)建议的限值。研究中的ELCR高于USEPA的限值;因此，不建议饮用该地区未经处理的水。

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Radiometric and elemental assessment of groundwater from Ifako-Ijaye area in Lagos, Southwestern Nigeria

Twenty borehole (BH) and 15 hand-dug wells (HD) water samples were collected from Ifako-Ijaiye for this study. The samples were analysed using NaI (TI) detector for radioactivity and BUCK200 AAS for elemental concentrations. The Effective Dose Rates (EDR) and Excess Lifetime Cancer Risks (ELCR) were calculated from activity concentrations of 40K, 238U and 232Th. The activity and elemental concentrations were statistically correlated. The mean activity concentrations of 40K, 238U and 232Th in the BH water were 8.77±8.40 Bq/L, 1.03±0.19 Bq/L and 0.93±0.15 Bq/L, respectively; and 10.12±0.07 Bq/L, 0.94±0.34 Bq/L and 0.89±0.10 Bq/L, respectively in the HD water. The EDR and ELCR in the study were higher in the infant than either creche or adult. The elemental concentrations in BH water were higher than the World Health Organisation (WHO) recommended limits. The ELCR in the study is higher than the USEPA limit; therefore, drinking untreated water from the area should be discouraged.

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来源期刊

International Journal of Low Radiation Environmental Science-Health, Toxicology and Mutagenesis

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期刊介绍： The IJLR is a peer-reviewed journal dedicated to the publication of research articles, review papers and technical notes in all domains related to low-dose radiation, among which are the biological and health effects in humans and the biota, in vitro and in vivo research on low radiation effects, regulatory and policy aspects, risk estimation and public perception.