Natural variation in 210Po and 210Pb activity concentrations in the urine of Finnish population groups

Abstract The constant rate of supply (CRS) of excess 210Pb model was successfully applied to assess 210Pb data of two sediment cores from the lake Qattinah, Syria. Gamma spectrometry was used to determine 137Cs and 210Pb activity concentrations. The bottom of the cores was 210Pb-dated to years 1907 and 1893. The accumulation rates were determined using 210Pb method and found to vary similarly in both cores from 0.10 ± 0.01 to 3.78 ± 0.57 kg m−2 y−1 during the past century. 137Cs was used as an in-dependent chronometer. The two distinct peaks observed on the 137Cs record of both cores, corresponding to 1965 and 1986, have allowed a successful validation of the CRS model.

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Activity concentrations of ²¹⁰Pb in the aerosol at Hanoi

Nuclear Science and Technology ◽

10.53747/jnst.v8i1.79 ◽

2021 ◽

Vol 8 (1) ◽

pp. 17-22

Author(s):

Duc Thang Duong ◽

Thu Bac Vuong ◽

Quang Long Nguyen ◽

Thu Ha Nguyen Thi ◽

Ngoc Quynh Nguyen ◽

...

Keyword(s):

Relative Humidity ◽

Glass Fiber ◽

High Activity ◽

Seasonal Variability ◽

Meteorological Parameters ◽

Correlation Coefficients ◽

Average Value ◽

Average Temperature ◽

Activity Concentrations ◽

210Pb Activity

In this study, aerosol samples at Hanoi, Vietnam from February 2017 to January 2018collected on the glass fiber filter were analyzed for 210Pb by using HPGe spectrometry. 210Pb weekly activity concentrations were in the range of 0.12 mBq.m-3 to 2.87 mBq.m-3 with an average value of 0.92 mBq.m-3 and 210Pb monthly activity concentrations were in the range of 0.99 mBq.m-3 to 9.24 mBq.m-3 with an average value of 4.01 mBq.m-3. The analysis of monthly averaged 210Pb activity concentrations revealed a dominant seasonal variability: high activity concentrations of 210Pb in winter and lower values in summer. The correlation between the activity concentrations of 210Pb in aerosoland the meteorological parameters (average temperature, precipitation and relative humidity) were observed and the obtained correlation coefficients are -0.95, -0.58 and -0.71, respectively.

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210Po and 210Pb Activity Concentrations in Cigarettes Produced in Vietnam and Their Estimated Dose Contribution Due to Smoking

Proceedings of the 12th Asia Pacific Physics Conference (APPC12) ◽

10.7566/jpscp.1.019002 ◽

2014 ◽

Cited By ~ 3

Author(s):

Thuy-Ngan N. Tran ◽

Cong-Hao Le ◽

Van-Tao Chau

Keyword(s):

Activity Concentrations ◽

210Pb Activity

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210Po and 210Pb concentration in zooplankton of the Syrian coastal waters (eastern Mediterranean Sea)

Mediterranean Marine Science ◽

10.12681/mms.19072 ◽

2019 ◽

Vol 20 (2) ◽

pp. 320 ◽

Cited By ~ 1

Author(s):

MOHAMMAD SAID AL-MASRI ◽

SAMER MAMISH ◽

MOHAMMAD ABDEL-HALEEM ◽

HANI HANI DURGHAM

Keyword(s):

Mediterranean Sea ◽

Coastal Waters ◽

Concentration Ratio ◽

Eastern Mediterranean ◽

Reference Database ◽

Eastern Mediterranean Sea ◽

Marine Zooplankton ◽

Activity Concentrations ◽

210Pb Activity ◽

Average Activity

210Po and 210Pb activity concentrations and their concentration ratio (CR) in marine zooplankton collected for the first time from the Syrian coastal waters (the eastern Mediterranean Sea) have been determined. The average activity concentrations of 210Po and 210Pb were 243±36 and 26.4±4.3 Bqkg-1 dw. The 210Po/210Pb activity ratio was found to be more than one in all zooplankton samples with an average of 9.2 (8.4 to 10), which indicates that the accumulation of 210Po in zooplankton does not come from the decay of the 210Pb only, and reflects a preferential bioaccumulation of 210Po over 210Pb. In addition, the Concentration Ratio (CR) for 210Po and 210Pb reached 104 and 103, respectively. This study will contribute to the radioecological reference database for zooplankton in the Mediterranean Sea.

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