干旱区生态环境知识资源中心(Arid): Assessment of radiation hazards from phosphate rocks, Sibaiya area, central eastern desert, Egypt

Arid

DOI	10.1016/j.apradiso.2021.109734
	Assessment of radiation hazards from phosphate rocks, Sibaiya area, central eastern desert, Egypt
	Gaafar, Ibrahim; Hanfi, Mohamed; El-Ahll, Lina S.; Zeidan, Ibrahim
通讯作者	Hanfi, M (corresponding author), Nucl Mat Author, Cairo, Egypt.
来源期刊	APPLIED RADIATION AND ISOTOPES
ISSN	0969-8043
EISSN	1872-9800
出版年	2021
卷号	173
英文摘要	The present work used the integrated Carbone gamma-ray spectrometric data and HPGe gamma-ray spectrometer data to the prospect of radioactive zones at the Sibaiya area, Central Eastern Desert, Egypt. Carbone gamma-ray spectrometric survey revealed ten uranium anomalies distributed along the car traverse from west to east direction have values of 240, 104, 44, 34, 150, 124, 232, 132, 60, and 90 ppm, respectively. These significant anomalies are associated mainly with phosphates mines characterized by a substantial increase of eU/eTh and eU/K ratios. Ten phosphate samples were collected from the determining anomalies. They were analyzed using the HPGe detector gammaray spectrometer. It was found that the results of radioelement concentrations by carborne survey agree well with that obtained by HPGe. The average activity concentration for the Sibaiya phosphate samples under study is 152.5, 947, and 33.2 Bq/kg against the worldwide accepted limit of 412, 33, and 45 Bq/kg for K-40, U-238, and Th-232, respectively. The radium equivalent ranges from 499 to 3484.9 Bq/kg, which is higher than the recommended value 370 Bq/kg. The external hazard's (H-ex) calculated values range from 1.35 to 9.42 mGy/yr, and the internal hazard (H-in) ranges from 2.58 to 18.69. These indexes must be lower than unity to keep the radiation hazard insignificant. The value of the radioactivity level index (I gamma) is found to be more than unity, which varies between 1.68 and 11.63. The dose rate (D-R) ranges from 149.5 to 970 nGy/h, higher than the international mean value of 55 nGy/h. The annual effective dose ranges from 0.18 to 1.19 mSv, which less than unity in almost all values. Meanwhile, the values of activity of Ra-226 ranged from 454 to 3429 Bq/kg and the mean of mass radon exhalation rate (J(m)) is 6615 mBq kg(-1) h(-1) which is lower than the worldwide average.
英文关键词	HPGe detector Carborne survey Phosphates mines Radiation hazard Worldwide accepted limit Radium equivalent content
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000649746400008
WOS关键词	NATURAL RADIOACTIVITY ; BUILDING-MATERIALS ; INDUSTRIAL-WASTES ; HEAVY-METALS ; BEACH SANDS ; SAMPLES ; GRANITE ; SOIL ; RADIONUCLIDES ; FERTILIZERS
WOS类目	Chemistry, Inorganic & Nuclear ; Nuclear Science & Technology ; Radiology, Nuclear Medicine & Medical Imaging
WOS研究方向	Chemistry ; Nuclear Science & Technology ; Radiology, Nuclear Medicine & Medical Imaging
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/349497
作者单位	[Gaafar, Ibrahim; Hanfi, Mohamed; Zeidan, Ibrahim] Nucl Mat Author, Cairo, Egypt; [El-Ahll, Lina S.] Ain Shams Univ, Fac Women, Cairo, Egypt; [Hanfi, Mohamed] Ural Fed Univ, Mira St 19, Ekaterinburg 620002, Russia
推荐引用方式 GB/T 7714	Gaafar, Ibrahim,Hanfi, Mohamed,El-Ahll, Lina S.,et al. Assessment of radiation hazards from phosphate rocks, Sibaiya area, central eastern desert, Egypt[J],2021,173.
APA	Gaafar, Ibrahim,Hanfi, Mohamed,El-Ahll, Lina S.,&Zeidan, Ibrahim.(2021).Assessment of radiation hazards from phosphate rocks, Sibaiya area, central eastern desert, Egypt.APPLIED RADIATION AND ISOTOPES,173.
MLA	Gaafar, Ibrahim,et al."Assessment of radiation hazards from phosphate rocks, Sibaiya area, central eastern desert, Egypt".APPLIED RADIATION AND ISOTOPES 173(2021).