利用伽马射线观测评估巴布亚新几内亚辛贝里金矿采矿废料样品中的剂量率

Q4 Environmental Science

Pollution Research Pub Date : 2023-01-01 DOI:10.53550/pr.2023.v42i01.002

David Kolkoma, F. PEREIRA B

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引用次数: 0

摘要

用NaI(Tl)射线能谱法测定了巴布亚新几内亚新爱尔兰省Simberi金矿采矿废土样品中天然放射性核素的比活度。Simberi土壤样品中238U和232Th同位素浓度分别为10.7和41.3 ppm，而世界平均值分别为2.64和11.1 ppm。辛贝瑞样品的平均镭当量活度为372.2±81.4 Bq/kg，高于370 Bq/kg的安全阈值。发现Simberi样品的平均内部危害指数为1.4，高于最大允许值1.0。Simberi的超额终身癌症风险(ELCR)计算值为0.00553±0.00122，而世界平均值为0.00145。发现辛贝里的辐射较高，这可能是因为辛贝里位于巴布亚新几内亚的火山地区

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ASSESSMENT OF DOSE RATE USING GAMMA RAY OBSERVATIONS IN THE MINING WASTE SAMPLES OF SIMBERI GOLD MINE IN PAPUA NEW GUINEA

The specific activity of natural radionuclides were measured by gamma ray spectrometry with NaI(Tl) detector in the mining waste soil samples collected from Simberi gold mine in New Ireland province of Papua New Guinea. The isotope concentrations of 238U and 232Th in Simberi soil samples are 10.7 and 41.3 ppm respectively whereas the world average values are 2.64 and 11.1 ppm respectively. The average Radium equivalent activity in Simberi samples is 372.2±81.4 Bq/kg which is observed to be higher than the threshold safe value of 370 Bq/kg. The average internal hazard index for Simberi samples is found to be 1.4 which is higher than the maximum permissible value of 1.0. The Excess Lifetime Cancer Risk (ELCR) is calculated to be 0.00553±0.00122 in Simberi whereas the world average value is 0.00145. Radiation in Simberi is found to be higher which may be because Simberi is situated in the volcanic region of Papua New Guinea

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Pollution Research Environmental Science-Water Science and Technology

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期刊介绍： POLLUTION RESEARCH is one of the leading enviromental journals in world and is widely subscribed in India and abroad by Institutions and Individuals in Industry, Research and Govt. Departments.