Siaka Yvette Flore Tchuente, Yakum Ntaw Susan Younui, S. Djepang, Saïdou-
{"title":"饮用水中的天然放射性测量和摄入剂量评估:喀麦隆波利含铀地区的案例","authors":"Siaka Yvette Flore Tchuente, Yakum Ntaw Susan Younui, S. Djepang, Saïdou-","doi":"10.1504/ijlr.2019.10024898","DOIUrl":null,"url":null,"abstract":"This study aimed at measuring radioactivity in drinking water and to assess corresponding ingestion dose to the public and the uranium toxicity. Twenty samples were collected in the uranium bearing region of Poli, Cameroon. α- and γ-spectrometry were used for radioactivity measurements. The range of activity concentrations for each radionuclide is 0.7 ± 0.3-3.5 ± 0.5 mBq.l−1 for 238U, 0.07 ± 0.03-2.1 ± 0.9 mBq.l−1 for 235U, 0.6 ± 0.2-5.1 ± 0.6 mBq.l−1 for 234U, 10 ± 1 mBq.l−1 for 226Ra, 10 ± 2-16.8 ± 2.2 mBq.l−1 for 210Po. Ingestion dose due to intake of 238U, 235U, 234U, 226Ra and 210Po in water was assessed for six age groups. The mean ingestion dose ranges from 8.8 μSv.yr−1 for adult to 123 μSv.yr−1 for infant, higher than the reference level of the committed effective dose (100 μSv.yr−1) recommended by the World Health Organisation (WHO). The uranium mass ranges between 0.014 μg.l−1 and 0.18 μg.l−1, below the reference mass which is 30 μg.l−1 showing that the uranium toxicity is low. 234U/238U isotopic ratio in water was observed with values near the equilibrium on 70% of collected samples and far from equilibrium reaching 3.09 in a borehole.","PeriodicalId":14141,"journal":{"name":"International Journal of Low Radiation","volume":" ","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2019-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":"{\"title\":\"Natural radioactivity measurements in drinking water and ingestion dose assessment: case of the uranium bearing region of Poli, Cameroon\",\"authors\":\"Siaka Yvette Flore Tchuente, Yakum Ntaw Susan Younui, S. Djepang, Saïdou-\",\"doi\":\"10.1504/ijlr.2019.10024898\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"This study aimed at measuring radioactivity in drinking water and to assess corresponding ingestion dose to the public and the uranium toxicity. Twenty samples were collected in the uranium bearing region of Poli, Cameroon. α- and γ-spectrometry were used for radioactivity measurements. The range of activity concentrations for each radionuclide is 0.7 ± 0.3-3.5 ± 0.5 mBq.l−1 for 238U, 0.07 ± 0.03-2.1 ± 0.9 mBq.l−1 for 235U, 0.6 ± 0.2-5.1 ± 0.6 mBq.l−1 for 234U, 10 ± 1 mBq.l−1 for 226Ra, 10 ± 2-16.8 ± 2.2 mBq.l−1 for 210Po. Ingestion dose due to intake of 238U, 235U, 234U, 226Ra and 210Po in water was assessed for six age groups. The mean ingestion dose ranges from 8.8 μSv.yr−1 for adult to 123 μSv.yr−1 for infant, higher than the reference level of the committed effective dose (100 μSv.yr−1) recommended by the World Health Organisation (WHO). The uranium mass ranges between 0.014 μg.l−1 and 0.18 μg.l−1, below the reference mass which is 30 μg.l−1 showing that the uranium toxicity is low. 234U/238U isotopic ratio in water was observed with values near the equilibrium on 70% of collected samples and far from equilibrium reaching 3.09 in a borehole.\",\"PeriodicalId\":14141,\"journal\":{\"name\":\"International Journal of Low Radiation\",\"volume\":\" \",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2019-10-25\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"4\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Journal of Low Radiation\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1504/ijlr.2019.10024898\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"Medicine\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Low Radiation","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1504/ijlr.2019.10024898","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"Medicine","Score":null,"Total":0}
Natural radioactivity measurements in drinking water and ingestion dose assessment: case of the uranium bearing region of Poli, Cameroon
This study aimed at measuring radioactivity in drinking water and to assess corresponding ingestion dose to the public and the uranium toxicity. Twenty samples were collected in the uranium bearing region of Poli, Cameroon. α- and γ-spectrometry were used for radioactivity measurements. The range of activity concentrations for each radionuclide is 0.7 ± 0.3-3.5 ± 0.5 mBq.l−1 for 238U, 0.07 ± 0.03-2.1 ± 0.9 mBq.l−1 for 235U, 0.6 ± 0.2-5.1 ± 0.6 mBq.l−1 for 234U, 10 ± 1 mBq.l−1 for 226Ra, 10 ± 2-16.8 ± 2.2 mBq.l−1 for 210Po. Ingestion dose due to intake of 238U, 235U, 234U, 226Ra and 210Po in water was assessed for six age groups. The mean ingestion dose ranges from 8.8 μSv.yr−1 for adult to 123 μSv.yr−1 for infant, higher than the reference level of the committed effective dose (100 μSv.yr−1) recommended by the World Health Organisation (WHO). The uranium mass ranges between 0.014 μg.l−1 and 0.18 μg.l−1, below the reference mass which is 30 μg.l−1 showing that the uranium toxicity is low. 234U/238U isotopic ratio in water was observed with values near the equilibrium on 70% of collected samples and far from equilibrium reaching 3.09 in a borehole.
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.