Natural radionuclides and assessment of radiological hazards in MuongHum, Lao Cai, Vietnam

Duong, Nguyen Thanh; Hao, Duong Van; Bui, Van Loat; Duong, Duc Thang; Trinh, Phan Trong; Xuan, Hoan Le

doi:10.1016/j.chemosphere.2020.128671

Cited by 27 publications

(12 citation statements)

References 48 publications

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“…Previously, several studies were carried out for the estimation of radionuclide content in various parts of the world and hence for evaluating a baseline data for their country so that the authorities may take significant steps for the safety of their citizens [6][7][8][9][10][11][12][13][14]. In continuation, there were numerous studies carried out in various states/parts of India depending upon variability in its lithology and geology [15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of background radiation level and excess lifetime cancer risk in Doon valley, Garhwal Himalaya

Kandari¹,

Singh

Semwal

et al. 2021

J Radioanal Nucl Chem

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Radionuclides such as Ra-226, Th-232 & K-40 occurs naturally in the earth crust from its creation and are main contributor to the dose received by human beings. The present study was carried-out in the Doon valley which is outlined in the Main Boundary Thrust (MBT) region of Garhwal Himalaya in Uttarakhand, India. The collected soil/rock samples were analyzed by NaI(Tl) Gamma ray spectrometry for the analysis of radionuclides and hence measuring the various health hazard indices and Excess lifetime cancer risk. Radionuclide (226Ra, 232Th & 40K) content were found to vary from 47 ± 9 to 442 ± 50 Bq Kg−1, 45 ± 17 to 101 ± 16 Bq Kg−1 & 320 ± 281 to 947 ± 197 Bq Kg−1 respectively and were higher than the world average values which are 35 Bq Kg−1, 30 Bq Kg−1 and 400 Bq Kg−1 respectively. Higher radionuclide content contributes to higher amount of absorbed doses which was found to vary from 93 to 259.6 ηGyh−1 with a mean value of 112.5 ηGyh−1 and Gamma index which found to vary from 0.73 to 1.92 with a mean value of 0.96. Lastly, on the basis of annual effective doses received to humanoid, Excess lifetime cancer risk was measured which varies from 0.48 × 10–3 to 1.34 × 10–3 with an average value of 0.65 × 10–3 and was much below the world’s average value of 1.45 × 10–3.

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Section: Introductionmentioning

confidence: 99%

“…In continuation, there were numerous studies carried out in various states/parts of India depending upon variability in its lithology and geology [15][16][17][18][19][20][21]. These studies were necessary for estimation of various doses received to humanoid and hence analyzing the excess lifetime cancer risk [13,16,22,23].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of background radiation level and excess lifetime cancer risk in Doon valley, Garhwal Himalaya

Kandari¹,

Singh

Semwal

et al. 2021

J Radioanal Nucl Chem

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“…The absorbed dose rate in air one meter above ground level represents the dose received in the open air from the radionuclides 226 Ra, 232 Th and 40 K. The absorbed dose rate can be determined using Eq. 2 [18,20].…”

Section: Absorbed Gamma Dose Ratementioning

confidence: 99%

“…The external hazard index (H ex ) and internal hazard index (H in ) are calculated by Eqs. 4 and 5 [20,[24][25][26].…”

Section: Hazard Indexmentioning

confidence: 99%

Assessment of Radiological Hazards in Soil, Water and Plants Around Coal Power Plant

Murniasih¹,

Prabasiwi²,

Sukirno³

2022

Atom Indo.

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The existence of a Coal-Fired Power Plant (CFPP) is suspected to affect the environment quality, especially the increment of natural radionuclides content which is found in coal as raw material. Therefore, systematic analysis of natural radionuclides ( 210 Pb, 234 Th, 238 U, 228 RA, 40 K, 226 RA and 232 Th) in water, soil, and plant were conducted to establish a database of environmental contamination in the area around a CFPP. This research was conducted in the area around Adipala Cilacap CFPP which operates with two towers. Samples were taken from three locations around the Adipala CFPP based on the secondary wind direction data from Indonesian Agency for Meteorological, Climatological, and Geophysics in the 2018 dry season. Samples were prepared in the Radiochemistry Laboratory, Center for Accelerator Science and Technology, BATAN. The concentration of radioactivity in environmental samples were analyzed using gamma spectrometry with a high purity germanium detector for 24hours after reaching its secular equilibrium. The result of samples analyses shown that the mean value of the radionuclides specific activities ( 210 Pb, 234 Th, 238 U, 228 RA, 40 K, 226 RA and 232 Th) for water, cassava leaves, grass, and soil were 0.789 Bq/L, 14.685 Bg/kg, 15.036 Bq/Kg, and 75.083 Bq/kg, respectively. The mean of radium equivalent activity (Ra eq ) for water, cassava leaves, grass, and soil were 1. 692, 30.792, 18.699 and 137.513 Bq/kg, respectively. The absorbed dose rate (ADR) for water, cassava leaves, grass, and soil were 0.775, 14.332, 8.627, and 64.135 nGy/h, respectively, whilst the annual effective dose rate (AEDR) were 0.004, 0.070, 0.042, and 0.315 mSv/y. The mean of external and internal hazard indices (H ex and H in ) for water, cassava leaves, grass, and soil were 0.005 and 0.006, 0.083 and 0.129, 0.050 and 0.078, and 0.371 and 0.554, respectively, while the mean of excess lifetime cancer risk (ELCR) wre 0.014×10 -6 , 0.246×10 -6 , 0.148×10 -6 , and 1.101×10 -6 . According to the calculation of radiation hazard index in this research, it was understood that all parameters of all samples were within acceptable limits by the world average value reported by the United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR).

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“…Bức xạ gamma từ các hạt nhân phóng xạ tự nhiên và các tia vũ trụ tạo thành sự phơi nhiễm chiếu xạ ngoài gây tác động đến sức khỏe và môi trường sinh thái [8,9]. Các hạt nhân phóng xạ tự nhiên 226 Ra, 238 U, 232 Th, 40 K và con cháu của chúng trong đất bề mặt gây ra liều bức xạ gamma trên mặt đất và đóng góp khoảng 80% liều hiệu dụng hàng năm tác động đến người dân sinh sống trong khu vực [1][2][3]. Các hạt nhân phóng xạ trong đất có thể được di chuyển vào cây cối và tích lũy trong cơ thể con người thông qua việc ăn lương thực và rau quả [4][5][6][7] Liều hiệu dụng hàng năm H eff , là tổng của liều chiếu ngoài và liều chiếu trong, được xác định theo công thức sau:…”

Section: Mở đầUunclassified

KẾT QUẢ QUAN TRẮC KHÍ RADON (222Rn; 220Rn) VÀ SUẤT LIỀU BỨC XẠ GAMMA THEO THỜI GIAN TẠI MỎ ĐẤT HIẾM MƯỜNG HUM, LÀO CAI

Văn¹,

Lan²,

Ngọc³

2022

SJ TTU

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Bài báo nghiên cứu đặc điểm biến động suất liều bức xạ gamma và nồng độ khí phóng xạ radon (222Rn; 220Rn) theo thời gian tại trạm quan trắc phóng xạ môi trường mỏ đất hiếm Mường Hum. Sử dụng phương pháp thống kê để xử lý số liệu suất liều gamma, nồng độ khí phóng xạ radon (222Rn; 220Rn) theo thời gian tại trạm quan trắc. Kết quả của nghiên cứu giúp điều chỉnh sự biến thiên ngày đêm và giá trị trung bình hàng năm của nồng độ khí phóng xạ và suất liều gamma khi tính toán liều hiệu dụng trung bình và liều hiệu dụng hàng năm. Kết quả khảo sát môi trường phóng xạ năm 2021 tại trạm quan trắc phóng xạ môi trường tại mỏ đất hiếm Mường Hum với số hiệu chỉnh của Radon, Thoron lần lượt là 1,65 và 1,97.

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Natural radionuclides and assessment of radiological hazards in MuongHum, Lao Cai, Vietnam

Cited by 27 publications

References 48 publications

Evaluation of background radiation level and excess lifetime cancer risk in Doon valley, Garhwal Himalaya

Evaluation of background radiation level and excess lifetime cancer risk in Doon valley, Garhwal Himalaya

Assessment of Radiological Hazards in Soil, Water and Plants Around Coal Power Plant

KẾT QUẢ QUAN TRẮC KHÍ RADON (222Rn; 220Rn) VÀ SUẤT LIỀU BỨC XẠ GAMMA THEO THỜI GIAN TẠI MỎ ĐẤT HIẾM MƯỜNG HUM, LÀO CAI

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