Effect of moisture content on the 222Rn mass exhalation rates for different grain-size samples of red brick and cement mortar used in Qena city, Egypt

Din, Khaled Salahel; Saad, Nagwa Eid Sobhy

doi:10.1007/s10967-021-08165-1

Cited by 2 publications

(2 citation statements)

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“…Alpha-Guard Radon monitor, PQ 2000PRO, was used to measure 222 Rn concentrations from January 2015 to December 2015. The monitor is designed for long-term monitoring of radon gas concentration with a 0.56 L active volume cylindrical ionization chamber operated at + 750 V. It has a sensitivity of 4.5 CPM/100 Bq m −3 and can measure in the range of 2–20,00,000 Bq m −3 12 . The detector was placed in the open air and continuous measurements of 222 Rn concentration in diffusion mode were performed at 60-min intervals.…”

Section: Methodsmentioning

confidence: 99%

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222Rn and its relation with meteorological conditions and gaseous pollutants in the outdoor environment of Qena City South of Egypt

Abbady,

Din,

Saad

2023

Sci Rep

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In the outdoor environment of Qena city, located in southern Egypt, 222Rn concentrations were continuously measured from January 2015 to December 2015 using Alpha-Guard radon monitor, PQ 2000 PRO. Meteorological parameters (air temperature AT, relative humidity RH, and evaporation rate EV) and gaseous pollutants [ozone O3, nitrogen oxide NOx, and particulate matter that has a diameter of less than 10 µm (PM10)] data for the same period were collected from the meteorological station. This work aims to study the potential relationships between 222Rn and each of the meteorological parameters and gaseous pollutants. According to observational data, the yearly average concentrations of 222Rn were 19.35 ± 1.58 Bq/m3, 31.68 ± 1.97 µg/m3 for O3, 9.97 ± 2.27 µg/m3 for NOx, and 109.95 ± 6.48 µg/m3 for PM10. The concentration of 222Rn is positively correlated with relative humidity, nitrogen oxide, and particulate matter, whereas it is negatively correlated with air temperature, evaporation rate, and ozone. Descriptive statistical analysis revealed various distribution patterns for 222Rn, meteorological parameters, and gaseous pollutants.

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Section: Methodsmentioning

confidence: 99%

“…During the calibration, a standard radon gas generator (SRM 4968), which had an activity of 400 Bq 226 Ra and a 90% 222 Rn emanation fraction, was used to expose the Alpha-Guard. The exposure was conducted inside a gas-tight calibration chamber made of stainless steel 12 .…”

Section: Methodsmentioning

confidence: 99%