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Dispersion of radionuclides from coal-fired brick kilns and concomitant impact on human health and the environment
Radiation Physics and Chemistry ( IF 2.9 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.radphyschem.2020.109165
M.J. Abedin , M.R. Karim , Mayeen Uddin Khandaker , M. Kamal , S. Hossain , M.H.A. Miah , D.A. Bradley , M.R.I. Faruque , M.I. Sayyed

Abstract Realizing the probable health implications via the exposures to radionuclides released from coal-fired brick kilns, concentrations of terrestrial radionuclides in feed coal, fly- and bottom ash collected from some major coal-fired brick kilns of Southern region in Bangladesh were measured using HPGe γ-ray spectrometry. Respective mean activity concentrations (Bq kg−1) for 226Ra, 232Th and 4 K were found to be 36.3 ± 1.8, 26.2 ± 2.1 and 314 ± 18 in feed coal; 60.8 ± 3.9, 36.6 ± 3.9 and 338 ± 19 in fly ash; 54.9 ± 4.0, 39.7 ± 4.6 and 311 ± 18.0 in bottom ash samples. As a result of the combustion process, radionuclide concentration enhancements have been observed in proceeding from feed coal to fly- and bottom-ash. The calculated values of air absorbed dose-rates for fly- and bottom-ash are greater than the world average of 55 nGy/h reported by UNSCEAR, and the Lifetime Cancer Risk (LCR) approaches towards the safe limit recommended by the ICRP. As such, this does flag up a potential concern for those dwelling in nearby areas, especially for the coal workers who normally do not take any protective measures against exposure to ash dust. Multivariate statistical analysis has been used in examining for correlations between the origins of the radionuclides and their influence on the calculated radiological parameters. The measured data indicate significance for human health, also for the scientific community, and could be used for modeling studies in the region.

中文翻译:

燃煤砖窑放射性核素的扩散及其对人类健康和环境的影响

摘要 通过暴露于燃煤砖窑释放的放射性核素可能对健康产生影响,使用 HPGe 测量了从孟加拉国南部地区一些主要燃煤砖窑收集的进料煤、飞灰和底灰中的陆地放射性核素浓度。 γ射线光谱法。发现进料煤中 226Ra、232Th 和 4 K 的平均活性浓度 (Bq kg-1) 分别为 36.3 ± 1.8、26.2 ± 2.1 和 314 ± 18;粉煤灰中 60.8 ± 3.9、36.6 ± 3.9 和 338 ± 19;在底灰样品中为 54.9 ± 4.0、39.7 ± 4.6 和 311 ± 18.0。作为燃烧过程的结果,在从进料煤到飞灰和底灰的过程中观察到放射性核素浓度增加。飞灰和底灰的空气吸收剂量率的计算值大于联合国辐射科委报告的 55 nGy/h 的世界平均水平,并且终生癌症风险 (LCR) 接近 ICRP 推荐的安全限值。因此,这确实表明居住在附近地区的人们可能会担心,特别是对于通常不采取任何保护措施防止接触灰烬的煤炭工人。多变量统计分析已被用于检查放射性核素的来源与其对计算出的放射学参数的影响之间的相关性。测量数据表明对人类健康和科学界的重要性,并可用于该地区的建模研究。和终生癌症风险 (LCR) 接近 ICRP 推荐的安全限值。因此,这确实标志着居住在附近地区的人们的潜在担忧,特别是对于通常不采取任何保护措施防止接触灰烬的煤炭工人。多变量统计分析已被用于检查放射性核素的来源与其对计算出的放射学参数的影响之间的相关性。测量数据表明对人类健康和科学界的重要性,并可用于该地区的建模研究。和终生癌症风险 (LCR) 接近 ICRP 推荐的安全限值。因此,这确实表明居住在附近地区的人们可能会担心,特别是对于通常不采取任何保护措施防止接触灰烬的煤炭工人。多变量统计分析已被用于检查放射性核素的来源与其对计算出的放射学参数的影响之间的相关性。测量数据表明对人类健康和科学界的重要性,并可用于该地区的建模研究。多变量统计分析已被用于检查放射性核素的来源与其对计算出的放射学参数的影响之间的相关性。测量数据表明对人类健康和科学界的重要性,并可用于该地区的建模研究。多变量统计分析已被用于检查放射性核素的来源与其对计算出的放射学参数的影响之间的相关性。测量数据表明对人类健康和科学界的重要性,并可用于该地区的建模研究。
更新日期:2020-12-01
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