A combined system for radioactive aerosol size distribution measurements of radon decay products

Khalaf, Hyam Nazmy Bader; Mostafa, Mostafa; Zhukovsky, Michael

doi:10.1016/j.radphyschem.2019.108402

Cited by 11 publications

(7 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This was deployed to measure the number size distributions of particles from the nanometer to the micrometer size ranges (from 5 nm to 10 μm). Aerosol particle parameters like concentration, average particle surface area, number size distribution, and metrological parameters (temperature, humidity and pressure) were recorded and automatically saved every ~1 min [37,[49][50][51][52][53].…”

Section: Methodsmentioning

confidence: 99%

Attachment rate characteristics of different wide used aerosol sources in indoor air

Mostafa

Khalaf

Zhukovsky

2021

J Environ Health Sci Engineer

Self Cite

View full text Add to dashboard Cite

In this work, six different aerosol sources, used in everyday life, were investigated to analyze parameters such as concentration, size distributions, and dynamics: regular and electronic cigarettes, incense, candles, mosquito coils, and cooking. During the experiments, the aerosol particle count ranged from 200 to 2•10 5 cm −3 . The number, mass, and specific surface area of the aerosol size distributions were measured by a Model 2702 M diffusion aerosol spectrometer (DAS) with a range of 5 nm to 10 μm. The attachment rate of radon decay products to aerosol particles is calculated depending on their size distribution/ The use of household sources of aerosols (heat treatment of food, smoking, candles, etc.) result in an increase in the concentration of aerosol particles by more than an order of magnitude, mainly due to the generation of ultrafine aerosols with number median diameter 64-92 nm and GSD 1.45-1.84. The mass distribution is dominated by particles with a distribution maximum in the range of 2-5 μm. The attachment of radon decay products to aerosols is associated with ultrafine particles with diameter < 200 nm. The median diameter of the rate of attachment to aerosols is 130 nm.

show abstract

Section: Methodsmentioning

confidence: 99%

Attachment rate characteristics of different wide used aerosol sources in indoor air

Mostafa

Khalaf

Zhukovsky

2021

J Environ Health Sci Engineer

Self Cite

View full text Add to dashboard Cite

show abstract

“…As reviewed by Porstendörfer and Reineking [14], f u RnP differs substantially from place to place, and depending on the environmental conditions, its value ranges from 0.006 to 0.83. Generally, it is inversely proportional to the number concentration of aerosol particles [75][76][77][78], the relationship being approximated by Papastefanou [18], Porstendörfer [74], and Huet et al [79]:…”

Section: Fundamentals Of Radon and Thoron Productsmentioning

confidence: 99%

Radon and Its Short-Lived Products in Indoor Air: Present Status and Perspectives

Vaupotič

2024

Sustainability

View full text Add to dashboard Cite

Initially, basic equations are given to express the activity concentrations and concentrations of potential α-energies of radon (222Rn) and thoron (220Tn) and their short-lived products in indoor air. The appearance of short-lived products as a radioactive aerosol is shown, and the fraction of the unattached products is particularly exposed, a key datum in radon dosimetry. This fundamental part is followed by giving the sources of radon and thoron indoors, and thus, their products, and displaying the dependence of their levels on the ground characteristics, building material and practice, and living–working habits of residents. Substantial hourly, daily, and seasonal changes in their activity concentrations are reviewed, as influenced by meteorological parameters (air temperature, pressure, humidity, and wind speed) and human activity (either by ventilation, air conditioning and air filtration, or by generating aerosol particles). The role of the aerosol particle concentration and their size distribution in the dynamics of radon products in indoor air has been elucidated, focusing on the fraction of unattached products. Intensifying combined monitoring of radon short-lived products and background aerosol would improve radon dosimetry approaches in field and laboratory experiments. A profound knowledge of the influence of meteorological parameters and human activities on the dynamics of the behaviour of radon and thoron accompanied by their products in the air is a prerequisite to managing sustainable indoor air quality and human health.

show abstract

“…No doubt that the radon problem (Radon-222) is one of the daily health hazard problems as radon and its decay products ( 218 Po [t 1/2 =3 min], 214 Pb [t 1/2 =27 min], 214 Bi [t 1/2 =20 min], and 214 Po [t 1/2 =164 µs] are considered the second cause of lung cancer [1][2][3][4][5][6][7][8][9][10]. International scienti c organizations rated radon as carcinogenic and as a serious health issue [11,12].…”

Section: Introductionmentioning

confidence: 99%

Measurement of radon concentration in water within Ojo axis of Lagos State, Nigeria

Mostafa

Olaoye

Ademola

et al. 2022

Preprint

View full text Add to dashboard Cite

Background: Radon (Radon-222) in water is one of the daily health hazard problems. Therefore, continue check of radon contamination in different types of water is essential.in the present work, sixteen groundwater and surface-water samples (wells, boreholes, and sachets) were collected from six different locations within Ojo Local Government area in Nigeria. The water samples collected were stored in 75 cl bottles which were already sterilized with distilled water to avoid contamination. Water samples were then taken to the laboratory for analysis of radon using RAD-7, an active electronic device produced by the Durridge Company in the USA. Results: The radon level in water is higher than the safer limits of 11 Bq/l as per EPA regulations except one site of the six under study. The total annual effective doses from ingestion and inhalation for drinking and ground water is upper than the safe limit of 0.1mSv y-1 recommended by WHO and EU council. Conclusions: The obtained results promote the development and/or the update of databases of radon levels in drinking and ground water in Ojo Local Government area in Nigeria.

show abstract

A combined system for radioactive aerosol size distribution measurements of radon decay products

Cited by 11 publications

References 14 publications

Attachment rate characteristics of different wide used aerosol sources in indoor air

Attachment rate characteristics of different wide used aerosol sources in indoor air

Radon and Its Short-Lived Products in Indoor Air: Present Status and Perspectives

Measurement of radon concentration in water within Ojo axis of Lagos State, Nigeria

Contact Info

Product

Resources

About