Presence of uranium and thorium in zircon assemblages separated from beach sands of Cox’s Bazar, Bangladesh

Zaman, Md. Mashrur; Rajib, Mohammad; Kabir, Mohammad Zafrul; Deeba, Farah; Rana, Shruti; Hossain, Shahadat; Latif, Shaikh Abdul; Rasul, M.G.

doi:10.18801/jstei.030116.18

Cited by 15 publications

(5 citation statements)

References 12 publications

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“…The computed range of the absorbed dose rate was between 30.50 and 242.93 nGyh -1 , with an average value of 74.87 nGyh -1 . Zaman et al (2016) investigates the levels of uranium and thorium in zircon assemblages extracted from beach sands in Cox's Bazar, Bangladesh. The results indicate that zircon rocks, commonly present in the coastal sands of the region, may contain radioactive elements.…”

Section: Findings Of Earlier Studies and Discussionmentioning

confidence: 99%

A review of naturally occurring radioactive elements in coastal regions of Bangladesh

Arefin,

Suny,

Hassan

et al. 2024

Bangladesh J. of Nucl. Agri.

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Extensive and systematic study has been carried out globally to get a thorough understanding of the underlying dynamics of radionuclides in the environment. This study was aimed to examine the natural radioactivity level in coastal areas of Bangladesh by combining the main research carried out on environmental radioactivity, predominantly employing established nuclear methods and methodologies during the past. The concentrations of important radionuclides, including 226Ra, 232Th, 40K, 238U, and 235U, were measured in those investigations. Soil samples showed the highest concentration of 226Ra at Inani Beach, Cox's Bazar (21°8ʹ N latitude, 92°4ʹ E longitude), with a value of 61.66 Bqkg-1. On the other hand, Cox's Bazar Sea Beach has the lowest 226Ra concentration at 10.8 Bqkg-1. In contrast, Cox's Bazar had the highest 226Ra activity in the sand and silt samples (147.93 Bqkg-1), whereas Kuakata Sea Beach (21° 48ʹ N latitude and 90° 10ʹ E longitude) had the lowest (2.82 Bqkg-1). The research found that 226Th activity varied from 1085.99 Bqkg-1 to 27.4 Bqkg-1 in soil samples from Cox's Bazar Sea Beach. In Cox's Bazar, the sand and silt samples showed the highest 226Th activity at 1085.9 Bqkg-1. In contrast, Kuakata Sea Beach has the lowest radioactivity at 9.22 Bqkg-1. Soil samples showed that 40K content was highest at Inani Beach (21°13ʹ N latitude and 92°3ʹ E longitude), Cox's Bazar (1304.11 Bqkg-1) and lowest at Cox's Bazar Sea Beach (25.16 Bqkg-1). The sand and silt sample from Kuakata Sea Beach had the greatest 40K activity, measuring 852 Bqkg-1. However, the sample from Cox's Bazar Sea Beach had the lowest amount (21.9 Bqkg-1). Soil samples from Cox's Bazar Sea Beach showed 238U activity of 455.99 Bqkg-1 and 110.84 Bqkg-1, respectively. The highest 238U activity sand sample was found in Cox's Bazar, measuring 460.5 Bqkg-1. The Patenga region (22°14ʹ N latitude and 91°47ʹ E longitude) in Chattogram has the lowest radioactive level, 45.2 Bqkg-1. The study's findings have been meticulously recorded as crucial foundational knowledge for forthcoming investigations on radionuclides in this coastal area. A comprehensive evaluation of prior published analyses of naturally occurring radioactive elements in the coastal regions of Bangladesh has shown that the level of activity is completely non-hazardous. The experimental areas' soils are ideal for a variety of agricultural and other purposes. Bangladesh J. Nuclear Agric, 37(2): 135-152, 2023

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Section: Findings Of Earlier Studies and Discussionmentioning

confidence: 99%

A review of naturally occurring radioactive elements in coastal regions of Bangladesh

Arefin,

Suny,

Hassan

et al. 2024

Bangladesh J. of Nucl. Agri.

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“…≤100 ppm. Zircon concentrates extracted from the Tista River should therefore have equivalent or lower radiogenic content than those from beach sand deposits that are conventionally mined for zircons, such as the Cox's Bazar region in Bangladesh (100-500 ppm Th, ∼100 ppm U in Zaman et al 2016) or the Murray Basin deposit in Australia (∼500 ppm Th, 500 ppm U, in Pownceby et al 2015).…”

Section: Mineral Abundance and Elemental Deportmentmentioning

confidence: 99%

Deciphering the Complex Mineralogy of River Sand Deposits through Clustering and Quantification of Hyperspectral X-Ray Maps

et al. 2020

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Alluvial mineral sands rank among the most complex subjects for mineral characterization due to the diverse range of minerals present in the sediments, which may collectively contain a daunting number of elements (>20) in major or minor concentrations (>1 wt%). To comprehensively characterize the phase abundance and chemistry of these complex mineral specimens, a method was developed using hyperspectral x-ray and cathodoluminescence mapping in an electron probe microanalyser (EPMA), coupled with automated cluster analysis and quantitative analysis of clustered x-ray spectra. This method proved successful in identifying and quantifying over 40 phases from mineral sand specimens, including unexpected phases with low modal abundance (<0.1%). The standard-based quantification method measured compositions in agreement with expected stoichiometry, with elemental detection limits in the range of <10–1,000 ppm, depending on phase abundance, and proved reliable even for challenging mineral species, such as the multi-rare earth element (REE) bearing mineral xenotime [(Y,REE)PO4] for which 24 elements were analyzed, including 12 overlapped REEs. The mineral identification procedure was also capable of characterizing mineral groups that exhibit significant compositional variability due to the substitution of multiple elements, such as garnets (Mg, Ca, Fe, Mn, Cr), pyroxenes (Mg, Ca, Fe), and amphiboles (Na, Mg, Ca, Fe, Al).

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“…Many studies have been carried out on different physical and chemical aspects like mineralogical composition of the beach sands of Cox's Bazar (Biswas, 1977), mechanism of heavy mineral concentration in the beach sands of Cox's Bazar (Biswas, 1981), presence of radioactivity in Cox's Bazar beach of Bangladesh (Schmidt and Asad, 1963), difference in grain size among heavy minerals of Cox's Bazar to Tekaf foredune deposit (Deeba, et al, 2009), the natural radioactivity of the beach sand and their associated mineralogical components (Zaman et al, 2016 and2012;Khan and Chowdhury, 2008;Rahman et al, 2008;Alam et al, 1999;Mitra et al, 1992;Kasim, 1988). Many researchers have worked on grain size and textural properties (Biswas, 1982 and1986;Samad and Hassan, 1982;Passega, 1964;Passega and Byramjee,1969), but very limited work on coastal plain sediments of the Moheshkhali and Kutubdia islands of Bangladesh has been carried out by earlier workers.…”

Section: Introductionmentioning

confidence: 99%

Geochemical Characterization and Presence of Rare Earth Elements in the Recent Depositions at the Islands of the Eastern Bay of Bengal, Bangladesh

Deeba

Rahman

Kabir

et al. 2020

IJEEG

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This study presents geochemical characterization, as well as, quantification of rare earth elements in the recent beach deposition at the two major islands of the eastern Bay of Bengal-Kutubdia and Moheshkhali. Placer sand samples from near surface depositions were analyzed by heavy mineral separation, mineralogical identification, chemical composition and elemental mapping. X-ray diffraction (XRD), X-ray fluorescence (XRF), Scanning Electron Microscopy with Energy Dispersive Spectroscopy (SEM-EDS) were used to obtain these results. The heavy mineral concentration in different raw sand samples resulted by heavy liquid separation technique revealed that the average abundance of heavy minerals is 69.67% in Kutubdia island and 9.32% in Moheshkhali island, respectively. The X-ray patterns of Kutubdia and Moheshkhali sand samples show the presence of zircon, quartz, hematite, magnetite, ilmenite, chromite, kyanite, anatase, rutile and garnet. Chemical composition of heavy mineral sands from Kutubdia and Moheshkhali islands were analyzed using X-ray fluorescence method (XRF) for major oxides and trace elements. The concentration is of Na2O, MgO, Al2O3, SiO2, P, K2O, CaO, TiO2, V2O5, Cr2O3, MnO, Fe2O3, CoO, ZnO, SrO, Y2O3 ZrO2, Nb2O5, MoO3, HfO2, WO3, ThO2, U3O8, CeO2, Nd2O and Er2O3 were determined. A significant amount of various rare earth elements (REEs) in the elemental composition of few samples was also identified. The study is expected to be useful in the baseline and environmental aspects of both the islands.

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Presence of uranium and thorium in zircon assemblages separated from beach sands of Cox’s Bazar, Bangladesh

Cited by 15 publications

References 12 publications

A review of naturally occurring radioactive elements in coastal regions of Bangladesh

A review of naturally occurring radioactive elements in coastal regions of Bangladesh

Deciphering the Complex Mineralogy of River Sand Deposits through Clustering and Quantification of Hyperspectral X-Ray Maps

Geochemical Characterization and Presence of Rare Earth Elements in the Recent Depositions at the Islands of the Eastern Bay of Bengal, Bangladesh

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