Distribution Characteristics of 7Be and 210Pb in Near-Surface Aerosols in Mianyang Area and Their Significance to O3 Tracer
Liu Yu-Hang,
Huang Ying,
Xie Hua,
Liu Cheng,
Du Yuan-Yuan,
Wang Rong,
Li Jiang-Bo,
Ji Yan-Ling
Issue:
Volume 9, Issue 1, March 2023
Pages:
1-7
Received:
2 January 2023
Accepted:
29 January 2023
Published:
27 February 2023
Abstract: In order to understand the quality of radiation environment in the near surface air in Mianyang area, to grasp the trend of its change, to explore the sources of aerosol substances near the surface and their significance in tracking the concentration of O3 near the ground, a detailed gamma spectrum analysis of aerosol samples from March 2018 to February 2019 in Anzhou District, Jiangyou City, Zitong County and Pingwu County was carried out. In general, the activity concentration of 7Be is higher in spring and autumn, while it is the lowest in summer. The annual average is 1.90-2.13mBq/m3, which is basically the same as the distribution characteristics of inland, mid-latitude, and low-altitude areas in the world. The activity concentration of 210Pb is a "U" type distribution feature throughout the year. It is the lowest in late spring or early summer and has an annual average of 1.24-1.66mBq/m3, which is a relatively high value of 210Pb activity concentration on global land. The correlation analysis between 7Be and 210Pb and O3 in near-surface aerosols showed that 7Be and O3 were weakly positively correlated, while the ratio of 7Be/210Pb was significantly positively correlated with O3, and 210Pb and O3 were significantly negatively correlated; The 7Be/210Pb ratio can be used as a good tracer of O3 sources in near-surface air. The O3 source in the near surface air in Mianyang area is greatly affected by the vertical convection activity of the atmosphere.
Abstract: In order to understand the quality of radiation environment in the near surface air in Mianyang area, to grasp the trend of its change, to explore the sources of aerosol substances near the surface and their significance in tracking the concentration of O3 near the ground, a detailed gamma spectrum analysis of aerosol samples from March 2018 to Feb...
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Radiation Dose Estimation to Adult Patients Undergoing Diagnostic Chest X-Rays Examinations in Kebbi State, North-Western Nigeria
Buhari Samaila,
Muhammad Danyaro Rilwanu
Issue:
Volume 9, Issue 1, March 2023
Pages:
8-12
Received:
3 February 2023
Accepted:
3 March 2023
Published:
20 March 2023
Abstract: The hyperconsciousness of radiation dose delivered to the patient during chest radiological X-ray procedures are prerequisite to negate menace of exposure. The pinpoint of this research is to inquest radiation doses received by the patient for routine individual radiological chest x-ray procedures in health care system associated to Kebbi State Government, Nigeria. Entrance Surface Dose and effective dose in accordance with the exposure factors collected for the real examinations were estimated by Cal Dose_X 5.0 software. Diagnostic reference levels [75th percentile] and other statistical parameters were calculated by the use of M. S excels spread sheet. The results obtained for ESD in this research work were 2.95mGy, 2.24mGy & 2.25mGy and 1.71mGy, 1.77mGy & 2.55mGy for Chest anteroposterior [AP], posteroanterior [PA] and lateral [LAT] respectively for Sir Yahaya Memorial Hospital (SYMH) and Federal Medical Centre (FMC), Birnin Kebbi. The effective doses were 0.68 mSv, 0.18 mSv& 0.09 mSv and 0.31 mSv, 0.13 mSv & 0.14 mSv for Chest AP, PA & LAT for SYMH and FMC respectively. Similarly, diagnostic reference level for chest AP, PA, & LAT were 2.34, 3.32 & 2.82, and 2.02, 1.88 & 3.19 respectively for SYMH and FMC. The results were compared with national and international studies. The ESD and DRLs reported in this research work for chest examinations were remarkably higher than that of the European Commission (2010), Australia (2017), NRPB (2000), UNSCEAR (2008), Iran (2008) and other research work reported elsewhere. For effective dose, the results were comparatively high except for few research work published in literatures. Therefore, the obtained results in this work revealed that the variations in the results among the two centres and other studies may likely be due to the improper selection of exposure parameters, patientbody sizes, and technical know-how of the staff. Finally, proper selection of radiological parameters and educational training to the staff can significantly reduce the risk of absorbed dose to patients.
Abstract: The hyperconsciousness of radiation dose delivered to the patient during chest radiological X-ray procedures are prerequisite to negate menace of exposure. The pinpoint of this research is to inquest radiation doses received by the patient for routine individual radiological chest x-ray procedures in health care system associated to Kebbi State Gov...
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