评估尼日利亚西南部三个城市废物倾倒场产生的过量终身癌症风险和放射性热

Q4 Medicine

International Journal of Low Radiation Pub Date : 2018-01-01 DOI:10.1504/IJLR.2018.10019602

E. Faweya, G. Adesakin, H. T. Akande, G. O. Olowomofe, T. Adewumi, G. Agunbiade

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引用次数: 2

摘要

利用高度屏蔽的堪培拉NaI (Tl)探测器，通过伽马射线光谱学评估了尼日利亚西南部三个城市周围各垃圾场的辐射暴露情况。40K的平均活性浓度分别为535±65、430±78、471±72和410±29、270±84、371±27 Bq kg−1;226Ra的平均浓度分别为66±4、47±3、11±1和57±10、49±13、59±17 Bq kg−1;abobeokuta、Akure和Osogbo指定和非指定地点的平均浓度分别为55±19、29±8、13±2和29±3、21±5、41±12 Bq kg−1。获得的最高平均吸收剂量率为86±17 nGy h−1。总超额终生癌症风险为1.28 ~ 3.22 × 10−3，相对高于世界平均水平。

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Assessment of excess lifetime cancer risk and radioactive heat production from waste dumpsites in three cities in Southwestern Nigeria

Radiation exposures at various dumpsites around three cities located in southwest Nigeria were assessed by gamma ray spectroscopy using a highly shielded Canberra NaI (Tl) detector. The average activity concentrations obtained for 40K were 535 ± 65, 430 ± 78, 471 ± 72 and 410 ± 29, 270 ± 84, 371 ± 27 Bq kg−1; the mean concentrations of 226Ra were 66 ± 4, 47 ± 3, 11 ± 1 and 57 ± 10, 49 ± 13, 59 ± 17 Bq kg−1; while the mean concentrations of 232Th were 55 ± 19, 29 ± 8, 13 ± 2 and 29 ± 3, 21 ± 5, 41 ± 12 Bq kg−1 for designated and undesignated sites in Abeokuta, Akure and Osogbo respectively. The highest mean absorbed dose rate obtained was 86 ± 17 nGy h−1. The total excess lifetime cancer risk ranged from 1.28 to 3.22 × 10−3 which is relatively higher than the world average.

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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.