Radioactivity in building materials used in and around Dhaka city

Roy, Sukanta; Alam, M. Shahid; Begum, Mahbuba; Alam, B.

doi:10.1093/rpd/nch471

Cited by 29 publications

(12 citation statements)

References 5 publications

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“…Although number of studies of NORM have been performed in Bangladesh for conventional building materials such as brick, sand, cement, gravel, gypsum, limestone and powdered lime, [8][9][10] information on the content of radioactivity from decorative building materials like granites, clay tiles and mosaic stone, etc. and their associated radiological hazards are still lacking.…”

Section: Introductionmentioning

confidence: 99%

Natural radioactivity levels and radiological assessment of decorative building materials in Bangladesh

Asaduzzaman

Khandaker

Amin

et al. 2014

Indoor and Built Environment

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The use of building covering media, largely for decorative purposes, presents an associated need for accurate evaluation of naturally occurring radioactive materials, crucial in assessing radiological risk. Radiological risks, assessed through investigation of decorative material samples, have been provided through key quantities, including radium equivalent activity (Ra eq ), external and internal hazard indices, gamma index, indoor and outdoor absorbed dose rates, as well as the corresponding annual effective doses. The concentrations of 232 Th and 40 K in all of the studied samples are higher than the respective world averages whereas for 226 Ra, only the clay tiles and a few other samples exceeded the world average value. The values for Ra eq for all samples were found to be <370 Bq kg À1 , recommended as the limiting dose below which safe use of bulk media can be assumed. For most samples, the internal and external hazard indices are well below the recommended limit of 1. The indoor absorbed dose rate has been observed to be higher than the population-weighted world average of 84 nGy h À1 , and the corresponding annual effective doses fall below the maximum dose limit of 1 mSv y À1 . The activity concentrations presented herein are expected to be useful in assessing the impact of future radiological loadings from use of decorative materials in dwellings.

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Section: Introductionmentioning

confidence: 99%

Natural radioactivity levels and radiological assessment of decorative building materials in Bangladesh

Asaduzzaman

Khandaker

Amin

et al. 2014

Indoor and Built Environment

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“…The study of the natural radioactivity levels in building materials is not only needed to assess the possible radiological hazards to human health but also to develop standards and guidelines for the use and management of these materials. 1 In recent years, there has been an increasing interest in the study of the radioactivity in various building materials, 2–25 although there are a few studies on the radioactivity of building materials used. Some cities in Turkey 26–29 require detailed information of the activity concentrations of 226 Ra, 232 Th and 40 K in building materials used but these are not available in literature.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of potential exposure risks of natural radioactivity levels emitted from building materials used in Adana, Turkey

Solak

Turhan

Uğur

et al. 2012

Indoor and Built Environment

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In this paper, the natural radioactivity levels in a total of 117 samples of 14 different building materials collected from building construction sites and from the retailers in Adana were studied by means of gamma-ray spectrometer with HPGe detector. The mean activity concentrations of 226 Ra, 232 Th and 40 K measured in the studied building material samples ranged from 2.1 to 88.2 Bq kg À1 , 1.8 to 52.7 Bq kg À1 and 68.1 to 847.5 Bq kg À1 for 226 Ra, 232 Th and 40 K radionuclide, respectively. The external and internal index, the indoor absorbed dose rate and the corresponding annual effective dose were evaluated for potential exposure risks from the usage of the building material samples. The evaluated values of the external and internal index were below the recommended upper level. All the values of effective annual dose determined were lower than recommended exemption level of 0.3 mSv. The results suggest that the use of the studied building material samples in the construction of buildings is unlikely to give rise to any significant radiation exposure to the residents.

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“…To date, a great attention has been paid to determining radionuclide concentrations in building materials in many countries [3] [9]- [19]. However, for Bangladesh, there is only a few experimental data [7] [20] [21] [22] available in literature regarding the radioactivity of building materials. Mollah et al [20] found a somewhat higher level of activity in building materials than in other countries.…”

Section: Introductionmentioning

confidence: 99%

“…The activity levels in brick samples were found to be consistent with some of that reported in literature. Recently, Asaduzzaman et al [7] and Roy et al [22] investigated some building materials (brick, sand and cement). The aim of the present research is not only the determination of natural radioactivity in some building materials but also the evaluation of the radiological hazard parameters such as Ra eq , D, D eff , H ex , H in , I γ , I α , AGDE and ELCR.…”

Section: Introductionmentioning

confidence: 99%

Natural Radioactivity Measurement and Assessment of Radiological Hazards in Some Building Materials Used in Bangladesh

Khatun¹,

Ferdous²,

Haque³

2018

JEP

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The radioactivity concentrations of 226 Ra, 232 Th and 40 K in 24 samples of natural and manufactured building materials commonly used in Bangladesh were measured using HPGe gamma ray spectrometer. The results in the present study were compared with the world average and also with the reported data available in literature. The radium equivalent activity, the absorbed dose rate, annual effective dose, external and internal hazard indices, gamma index, alpha index, annual gonadal dose equivalent and excess lifetime cancer risk were also evaluated to assess the potential radiation hazards associated with these building materials. All samples under investigation were found to be within the recommended safety limit and do not pose any significant radiation hazards. This study can be used as a reference for more extensive studies of the same subject in future.

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Radioactivity in building materials used in and around Dhaka city

Cited by 29 publications

References 5 publications

Natural radioactivity levels and radiological assessment of decorative building materials in Bangladesh

Natural radioactivity levels and radiological assessment of decorative building materials in Bangladesh

Evaluation of potential exposure risks of natural radioactivity levels emitted from building materials used in Adana, Turkey

Natural Radioactivity Measurement and Assessment of Radiological Hazards in Some Building Materials Used in Bangladesh

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