{"title":"尼日尔三角洲沉积有机岩石样品中的天然放射性核素","authors":"A. Akinlua, J. Fagbemi, F.O.I. Asubiojo, N. Torto","doi":"10.1504/IJLR.2014.060908","DOIUrl":null,"url":null,"abstract":"Thirty sedimentary organic rock samples were collected at different depths from three oil wells in the Niger Delta. The natural radionuclides in the samples were measured in order to determine their geochemical significance and radiological effect. The radionuclides were measured using gamma spectrometric technique. Natural occurring radionuclides identified were uranium, thorium and potassium. The average activity concentrations obtained were 2441.65±753.00, 28.31±8.83 and 14.49±4.46 Bq/kg for 40K, 232Th and 238U, respectively. The equivalent doses calculated from activity concentrations of the radionuclides ranged from 0.69–1.25, 0.89–1.18, and 1.19–1.38 mSv/year for Meji, Malu and Mefa oil wells, respectively. These values are slightly higher than the normal background radiation value of 1 mSv/year. The background radiation of 40K detected in these samples was high, the absorbed dose rate and equivalent dose was slightly high, which could pose intrinsically radiological health hazard because of their cumulative radiological effect in the environment.","PeriodicalId":14141,"journal":{"name":"International Journal of Low Radiation","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2014-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/IJLR.2014.060908","citationCount":"0","resultStr":"{\"title\":\"Natural radionuclides in Niger delta sedimentary organic rock samples\",\"authors\":\"A. Akinlua, J. Fagbemi, F.O.I. Asubiojo, N. Torto\",\"doi\":\"10.1504/IJLR.2014.060908\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Thirty sedimentary organic rock samples were collected at different depths from three oil wells in the Niger Delta. The natural radionuclides in the samples were measured in order to determine their geochemical significance and radiological effect. The radionuclides were measured using gamma spectrometric technique. Natural occurring radionuclides identified were uranium, thorium and potassium. The average activity concentrations obtained were 2441.65±753.00, 28.31±8.83 and 14.49±4.46 Bq/kg for 40K, 232Th and 238U, respectively. The equivalent doses calculated from activity concentrations of the radionuclides ranged from 0.69–1.25, 0.89–1.18, and 1.19–1.38 mSv/year for Meji, Malu and Mefa oil wells, respectively. These values are slightly higher than the normal background radiation value of 1 mSv/year. The background radiation of 40K detected in these samples was high, the absorbed dose rate and equivalent dose was slightly high, which could pose intrinsically radiological health hazard because of their cumulative radiological effect in the environment.\",\"PeriodicalId\":14141,\"journal\":{\"name\":\"International Journal of Low Radiation\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2014-05-23\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1504/IJLR.2014.060908\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Journal of Low Radiation\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1504/IJLR.2014.060908\",\"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.2014.060908","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"Medicine","Score":null,"Total":0}
Natural radionuclides in Niger delta sedimentary organic rock samples
Thirty sedimentary organic rock samples were collected at different depths from three oil wells in the Niger Delta. The natural radionuclides in the samples were measured in order to determine their geochemical significance and radiological effect. The radionuclides were measured using gamma spectrometric technique. Natural occurring radionuclides identified were uranium, thorium and potassium. The average activity concentrations obtained were 2441.65±753.00, 28.31±8.83 and 14.49±4.46 Bq/kg for 40K, 232Th and 238U, respectively. The equivalent doses calculated from activity concentrations of the radionuclides ranged from 0.69–1.25, 0.89–1.18, and 1.19–1.38 mSv/year for Meji, Malu and Mefa oil wells, respectively. These values are slightly higher than the normal background radiation value of 1 mSv/year. The background radiation of 40K detected in these samples was high, the absorbed dose rate and equivalent dose was slightly high, which could pose intrinsically radiological health hazard because of their cumulative radiological effect in the environment.
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.