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Radon sampling methodologies: A case for accurate, accessible measurements using household instruments.
J Air Waste Manag Assoc
July 2023
Department of Environmental Health, Harvard T.H. Chan School of Public Heath, Boston, Massachusetts, USA.
Radon is a prevalent carcinogenic gas and the leading cause of lung cancer in the United States besides smoking. As the residential environment is the primary source of radon exposure, accessible and accurate measurements of radon in this environment are essential. However, no radon monitors have been evaluated that are inexpensive enough for regular household use.
View Article and Find Full Text PDFZIF-95 as a filler for enhanced gas separation performance of polysulfone membrane.
RSC Adv
October 2021
Chemical Engineering Department, King Fahad University of Petroleum and Minerals Dhahran 31261 Saudi Arabia
Metal-organic frameworks (MOFs) are found to be promising porous crystalline materials for application in gas separation. Considering that mixed matrix membranes usually increase the gas separation performance of a polymer by increasing selectivity, permeability, or both (, perm-selectivity), the zeolitic imidazole framework-95 (ZIF-95) MOF was dispersed for the first time in polysulfone (PSF) polymer to form mixed matrix membranes (MMMs), namely, ZIF-95/PSF. The fabricated ZIF-95/PSF membranes were examined for the separation of various gases.
View Article and Find Full Text PDFGamma radiation and indoor radon concentrations in the western and southwestern regions of Saudi Arabia.
Heliyon
January 2019
Department of Physics, Faculty of Science, Al-Balqa Applied University, Salt 19117, Jordan.
The exposure of the population to natural gamma radiation in air and to indoor radon gas was investigated in Makkah, AlBaha, Assir, Jazan and Najran regions in the western and southwestern of Saudi Arabia. The survey was performed by using LiF:Mg,Cu,P thermoluminescence dosimeters (TLDs) for indoor and outdoor absorbed dose rates in air measurements in 885 locations, and a passive integrating ionizing system, equipped with an E-Perm Electret ion chamber, for radon concentration measurements in a total of 1119 dwellings. The ambient indoor rates vary from 54 to 191 nSv h, while it is in the range of 42-112 nSv h for the outdoor.
View Article and Find Full Text PDFRadon and Thoron In-air Occupational Exposure Study within Selected Wine Cellars of the Western Cape (South Africa) and Associated Annual Effective Doses.
Health Phys
January 2017
*Department of Physics, Stellenbosch University, Merensky Building, Merriman Avenue, Private Bag X1, Matieland, 7601, South Africa; †Department of Physics, University of Western Cape, Private Bag X17 Bellville 7535, South Africa; ‡Department of Nuclear Physics, NRF-iThemba LABS, PO Box 722, Somerset West 7129, South Africa.
This is the first known study of exposure of Rn (radon) and secondarily Rn (thoron) in-air activity concentrations assessed within nine selected wine cellars in four wine districts of the Western Cape (South Africa) and the associated annual occupational effective doses. E-PERM electret ion chambers (EIC) and RAD-7 α-detectors were used to perform these measurements. The radon in-air levels ranged from 12 ± 4 Bq m to 770 ± 40 Bq m within the nine selected wine cellars.
View Article and Find Full Text PDFRadon dose assessment in underground mines in Brazil.
Radiat Prot Dosimetry
July 2014
Nuclear Engineering Department, Federal University of Minas Gerais, Av. Antônio Carlos, Belo Horizonte 6621, Brazil.
Underground miners are internally exposed to radon, thoron and their short-lived decay products during the mineral processing. There is also an external exposure due to the gamma emitters present in the rock and dust of the mine. However, the short-lived radon decay products are recognised as the main radiation health risk.
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