Assessment of radionuclides in the soil of residential areas of the Chittagong metropolitan city, Bangladesh and evaluation of associated radiological risk

被引：13
作者：
Rashed-Nizam, Quazi Muhammad [1 ]
Rahman, Md. Mashiur [1 ]
Kamal, Masud [2 ]
Chowdhury, Mantazul Islam [2 ,3 ]
机构：
[1] Univ Chittagong, Dept Phys, Chittagong 4331, Bangladesh
[2] Bangladesh Atom Energy Commiss, Radioact Testing & Monitoring Lab, Dhaka, Bangladesh
[3] Southern Univ, Chittagong, Bangladesh
来源：
JOURNAL OF RADIATION RESEARCH | 2015年 / 56卷 / 01期
关键词：
radionuclides; gamma ray spectrometry; BEGe detector; radiological hazard parameters; Excess of Lifetime Cancer Risk (ELCR); NATURAL RADIOACTIVITY; RIVER SEDIMENTS; SAMPLES; PROVINCE;
D O I：
10.1093/jrr/rru073
中图分类号：
Q [生物科学];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Soil samples from the three residential hubs of Chittagong city, Bangladesh were analyzed using gamma spectrometry to estimate radiation hazard due to natural radioactive sources and anthropogenic nuclide Cs-137. The activity concentration of Ra-226 was found to be in the range 11-25 Bq.kg(-1), Th-232 in the range 38-59 Bq.kg(-1) and K-40 in the range 246-414 Bq.kg(-1). These results were used to calculate the radiological hazard parameters including Excess of Lifetime Cancer Risk (ELCR). The estimated outdoor gamma exposure rates were 40.6-63.8 nGy.h(-1). The radiation hazard index (radium equivalent activity) ranged from 90-140 Bq.kg(-1). The average value of the ELCR was found to be 0.21 x 10(-3), which is lower than the world average. Sporadic fallout of Cs-137 was observed with an average value of 2.0 Bq.kg(-1).
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收藏
页码：22 / 29
页数：8
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