title: Radiological impact of natural radioactivity in Egyptian phosphate rocks, phosphogypsum and phosphate fertilizers.
abstract: In this study, the activity concentrations of the natural radionuclides in phosphate rocks and its products were measured using a high- purity germanium detector (HPGe). The obtained activity results show remarkable wide variation in the radioactive contents for the different phosphate samples. The average activity concentration of235U,238U,226Ra,232Th and40K was found as (45, 1031, 786, 85 and 765Bq/kg) for phosphate rocks, (28, 1234, 457, 123 and 819Bq/kg) for phosphate fertilizers, (47, 663, 550, 79 and 870Bq/kg) for phosphogypsum and (25, 543, 409, 54 and 897Bq/kg) for single super phosphate respectively. Based on the measured activities, the radiological parameters (activity concentration index, absorbed gamma dose rate in outdoor and indoor and the corresponding annual effective dose rates and total excess lifetime cancer risk) were estimated to assess the radiological hazards. The total excess lifetime cancer risk (ELCR) has been calculated and found to be high in all samples, which related to high radioactivity, representing radiological risk for the health of the population.
authors.affiliation: Nuclear Physics Laboratory, College for Women for Art, Science and Education, Ain Shams University, Cairo, Egypt.
authors.forename: S M
authors.initials: SM
authors.lastname: El-Bahi
authors.affiliation: Nuclear Physics Laboratory, College for Women for Art, Science and Education, Ain Shams University, Cairo, Egypt.
authors.forename: A
authors.initials: A
authors.lastname: Sroor
authors.affiliation: Experimental Nuclear Physics Department, Nuclear Research Center, Atomic Energy Authority, Post Office No. 13759, Cairo, Egypt. Electronic address: gg_yousef@yahoo.com.
authors.forename: Gehan Y
authors.initials: GY
authors.lastname: Mohamed
authors.affiliation: Nuclear Physics Laboratory, College for Women for Art, Science and Education, Ain Shams University, Cairo, Egypt.
authors.forename: N S
authors.initials: NS
authors.lastname: El-Gendy
keywords: Excess lifetime cancer risk (ELCR); Natural radioactivity; Phosphate rocks; Radiological hazards