International Journal of Radiation Research
نشریه پرتو پژوه
Int J Radiat Res
Basic Sciences
http://ijrr.com
79
journal79
2322-3243
2345-4229
10.61186/ijrr
en
jalali
1399
1
1
gregorian
2020
4
1
18
2
online
1
fulltext
en
Evaluation of health hazards from radionuclides in soil and rocks of North Waziristan, Pakistan
Medical Physics
Medical Physics
تحقيق بديع
Original Research
<div style="text-align: justify;">Background: The aim & objective of this study is to evaluate the health hazards of the general public from the existence of the radioactive nuclides in soil of North Waziristan and to establish a reference line for future work on radioactivity concentration in this locality. Methods and Materials: A highly background radiation shielded HPGe system is used to measure radioactivity in the collected samples of the geographical study area. Results: The radioactivity concentration is found to be in the range 42.6–106.3 Bq/kg for Ra-226, 4.0–93.8 Bq/kg for Th-232, 49.9–645.5 Bq/kg for K-40, and 2.6–8.33 Bq/kg for Cs-137. The external and internal hazards indices (H<sub>ext </sub>& H<sub>int</sub>), absorbed γ- dose rate (ADR) and average effective dose (AED) are estimated from the computed activities and determined the average H<sub>ext</sub> ~ 0.75 and H<sub>int </sub>~ 0.94. The mean absorbed dose rate was found to be 101 nGy/h. The Radium equivalent activity of Datta Khel (422.081 Bq/kg), Khaisur forest (407.938 Bq/kg), Jani Khel (379.213) specific regions and the corresponding outdoor annual effective dose rate was found to be 0.15 mSv/yr, which is higher than the world’s mean value of 0.07 mSv/yr. Conclusion: A strong possitive correlation amongst the radioactive nuclides and, corresponding radiological variables at P ≤ 0.01confirmed that Ra-226 and Th-232 were the significant contributors to γ-radiation emission. Radioactivity concentrations and corresponding radiometric parameters were found to be higher in the specific areas of North Waziristan compared to the world’s mean values poses possible radiological risks for the residents of those areas.</div>
HPGe detector, Background Radioactivity, radiological hazards, soil.
243
253
http://ijrr.com/browse.php?a_code=A-10-2055-9&slc_lang=en&sid=1
I.U.
Khan
7900319475328460015278
7900319475328460015278
No
Key Lab of In-fiber Integrated Optics, Ministry Education of China, Harbin Engineering University, Harbin 150001
Z.
Qin
7900319475328460015279
7900319475328460015279
No
Key Lab of In-fiber Integrated Optics, Ministry Education of China, Harbin Engineering University, Harbin 150001
T.
Xie
7900319475328460015280
7900319475328460015280
No
Key Lab of In-fiber Integrated Optics, Ministry Education of China, Harbin Engineering University, Harbin 150001
Z.
Bin
7900319475328460015281
7900319475328460015281
No
Key Lab of In-fiber Integrated Optics, Ministry Education of China, Harbin Engineering University, Harbin 150001
H.
Li
7900319475328460015282
7900319475328460015282
No
Key Lab of In-fiber Integrated Optics, Ministry Education of China, Harbin Engineering University, Harbin 150001
W.
Sun
sunweimin@hrbeu.edu.cn
7900319475328460015283
7900319475328460015283
Yes
Key Lab of In-fiber Integrated Optics, Ministry Education of China, Harbin Engineering University, Harbin 150001
E.
Lewis
7900319475328460015284
7900319475328460015284
No
Optical Fibre Sensors Research Centre, University of Limerick, Castletroy, Limerick, Ireland