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1

One-year-long, comprehensive analysis of pm number and mass size distributions in Warszawa (Poland)

Bihałowicz Jan Stefan, Rogula-Kozłowska Wioletta, Rogula-Kopiec Patrycja, Świsłowski Paweł, Rajfur Małgorzata, Tomasz Olszowski

Ecological Chemistry and Engineering. S

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2023

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Vol. 30, nr 4

541--556

EN

The properties of particulate matter PM, including its impact on the environment and human health, depend mainly on the size (more precisely: size distribution) of the particles since the size is usually dependent on the processes/sources of the PM. This work presents the results of a one-year-long measurement campaign of PM. PALAS Fidas 200 from Airpointer air quality station was used. The PM was measured in Warsaw, Poland continuously from 1st May 2022 to 30th April 2023; size distribution was recorded with 120 s intervals and averaged in 3600 s periods. It was found, that the number and the mass size distribution varied depending on the averaging period (different hours of the day, different days of the week, and different months of the year). Additionally, the authors determined the periods of impact on selected sources (traffic emission, municipal emission, and industrial emission) on the number and mass size distributions of PM at the sampling site. Monitoring of number and mass size distributions of PM is a relatively easy and more cost-effective method than analysing the chemical composition of PM. Therefore, is crucial to develop a method of identifying sources of PM based on size distributions. It was found that such a method can be in the future as successful in source apportionment as in the analysis of chemical compositions.

2

Non-regulated emissions and particle number emissions of two passenger cars with diesel-butanol blends

Engelmann Danilo, Comte Pierre, Czerwinski Jan, Renz Stephan, Bonsack Peter

Combustion Engines

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2020

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R. 59, nr 4

29--38

EN

Biofuels represent one of the alternatives to obtain the CO2 - neutral propulsion of IC-engines. Butanol, which can be produced from biomass, is considered and was investigated in the last years due to the very advantageous characteristics of this alternative fuel. Butanol can be easily and irreversibly blended both with light (gasoline) and heavier (diesel) fuels. Comparing with ethanol it has the advantages of: higher calorific value, lower hygroscopicity and lower corrosivity. It can replace the aviation fuels. This paper presents the emission results obtained on two diesel passenger cars with different technology (Euro 2 and Euro 6c) and with addition of butanol to diesel fuel, as a part of the research project DiBut (diesel and butanol). Interesting results are given about some non-legislated (non-regulated) components, acetaldehyde (MeCHO) and formaldehyde (HCHO) and about the PN-emissions with/without DPF.

3

Effect of electronic cigarette (EC) aerosols on particle size distribution in indoor air and in a radon chamber

Khalaf Hyam Nazmy, Mostafa Mostafa Y. A., Zhukovsky Michael

Nukleonika

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2019

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Vol. 64, No. 1

31--38

EN

Particle size distribution is an important factor governing whether aerosols can be deposited in various respiratory tract regions in humans. Recently, electronic cigarette (EC), as the alternative of tobacco cigarette, has become increasingly popular all over the world. However, emissions from ECs may contribute to both indoor and outdoor air pollution; moreover, comments about their safety remain controversial, and the number of users is increasing rapidly. In this investigation, aerosols were generated from ECs and studied in the indoor air and in a chamber under controlled conditions of radon concentration. The generated aerosols were characterized in terms of particle number concentrations, size, and activity distributions by using aerosol diffusion spectrometer (ADS), diffusion battery, and cascade impactor. The range of ADS assessment was from 10–3 µm to 10 µm. The number concentration of the injected aerosol particles was between 40 000 and 100 000 particles/cm3. The distribution of these particles was the most within the ultrafi ne particle size range (0–0.2 µm), and the other particle were in the size range from 0.3 µm to 1 µm. The surface area distribution and the mass size distribution are presented and compared with bimodal distribution. In the radon chamber, all distributions were clearly bimodal, as the free radon decay product was approximately 1 nm in diameter, with a fraction of 0.7 for a clean chamber (without any additional source of aerosols). The attached fraction with the aerosol particles from the ECs had a size not exceeding 1.0 µm.

4

Monitoring of Indoor Ultrafine Particulate Matter at the Sites of the Czech Armed Forces

Kellnerova Eva, Vecera Zbynek, Kellner Josef, Zeman Tomas

Inżynieria Mineralna

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2019

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R. 21, nr 1

163--167

EN

Ultrafine particles and nanoparticles in the air are evaluated as a risk factor for the development of respiratory and other health symptoms due to their inhalation from the ambient air. The Czech Army professionals are expected to have frequent presence in a polluted environment and regular exposure to air with increased concentration of airborne pollutants. The report evaluates the presence of ultra-fine particles (in the range of about 7.6–299.6 nm) in rooms often used by soldiers during their working hours when they are not deployed. The purpose is to assess whether the presence of troops in these workplaces is safe and does not pose a risk of adverse health effects in itself. Testing took place in three military rooms (classroom 1, classroom 2 and exercise flight simulator room). Seven samples of air were analysed in time by the scanning mobility particle sizer in succession. Mean particle concentrations were found at 1.79×104, 7.53×103 and 8.39×103 N·cm-3 for the classroom 1, classroom 2 and exercise flight simulator room. Conclusions of the research have shown that particle concentrations in the places of the Czech Army can reach values that border the immission limits stated by the World Health Organisation.

PL

Najdrobniejsze cząstki i nanocząsteczki w powietrzu są oceniane jako czynnik ryzyka dla dróg oddechowych i innych objawów zdrowotnych spowodowanych ich wdychaniem z otaczającego powietrza. Oczekuje się, że specjaliści z czeskiej armii będą często obecni w zanieczyszczonym środowisku i będą regularnie narażeni na kontakt z powietrzem o zwiększonej koncentracji zanieczyszczeń. Raport ocenia obecność ultradrobnych cząstek (w zakresie około 7,6–299,6 nm) w pomieszczeniach często używanych przez żołnierzy w godzinach pracy. Celem jest ocena, czy obecność wojsk w tych miejscach pracy jest bezpieczna i sama w sobie nie stwarza ryzyka negatywnych skutków zdrowotnych. Testowanie odbyło się w trzech pomieszczeniach wojskowych (sala 1, sala 2 i sala do ćwiczeń). Siedem próbek powietrza analizowano w czasie przez separator cząstek. Stwierdzone średnie stężenia cząstek 1,79 × 104, 7,53 × 103 i 8,39 × 103 [N · cm-3] w sali lekcyjnej 1, klasie 2 i sali do ćwiczeń. Wnioski z badań wykazały, że stężenia cząstek w wybranych pomieszczeniach czeskiej armii mogą osiągnąć wartości graniczące z limitami imisji podanymi przez Światową Organizację Zdrowia.

5

Transmission of ultrafine particles through separating systems of dust samplers

Skubacz K.

Journal of Sustainable Mining

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2018

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Vol. 17, iss. 2

48--55

EN

In underground mines there is a radiation hazard associated with natural radioactive nuclides. The main sources of radiation exposure in Polish mines are short-lived radon decay products, radioactive mine water containing radium and the sediments precipitated from these waters. For miners, the most common hazard is usually the short-lived radon decay products. Aspirators, equipped with separation systems, are mostly used in order to control this hazard. Inside these aspirators there are meters which measure the radiation emitted by radioactive aerosols collected on the filter. The purpose of these systems is to remove particles from the air stream that do not form the respirable fraction. At the same time, however, a deposition of small-size aerosols takes place in them because of the high values of their corresponding diffusion coefficients. This excludes the possibility of their proper detection by radiation meters. In this paper, the transmission of particles up to 100 nm in size by the separating systems is evaluated. The evaluated transmission ranged from about 60% for sizes of 7 nm, reaching up to 95% at the boundary values of the tested range. The influence of the particle distribution of the aerosols on the radiation calibration coefficients was also investigated in a radon chamber, through their exposure to conditions where the air contained low aerosol concentrations of about 4.0×108 particles/m3 and also when it was nearly 100-times higher. In the first case, the measured sensitivity of the meters was about 20-30% lower, which was probably due to a higher number of small aerosols and, as a result, particle transmission decreased. However, at higher aerosol concentrations, the sensitivity of the meters remained practically the same, regardless of whether the air reached the filters by the separation systems or if they were omitted.

6

Measurements of aerosol size distribution in urban areas of Upper Silesia

Skubacz K.

Archives of Environmental Protection

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2009

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Vol. 35, no. 4

23-34

EN

Deposition of aerosols in the respiratory tracts depends on their size distribution. Investigation of such distribution has therefore great meaning for appropriate assessment of risk caused by hazardous pollutants that appear in environment both as a result of human activities like industry, emission from motor vehicles, municipal emission due to house furnaces and natural phenomena. The results of screening measurements of size distribution performed in several places located on highly populated areas in Upper Silesia, Poland are described in this paper. The applied equipment makes it possible to cover the range from several nanometers up to 20 žm, practically all particles that belong to the respirable class. Obtained results prove that a lot of particles having a size of the order of submicrons are produced close to high density traffic roads. This concentration strongly changed in time.

PL

Depozycją aerozoli w układzie oddechowym zależy od rozkładu ziarnowego aerozoli. Badanie rozkładu ma zatem duże znaczenie dla właściwej oceny zagrożenia spowodowanego przez szkodliwe substancje pojawiające się w środowisku bądź to w następstwie ludzkiej aktywności takiej jak produkcja przemysłowa, komunikacja i paleniska domowe bądź też w wyniku naturalnych procesów. W pracy opisano i oceniono wyniki pilotażowych pomiarów rozkładów ziarnowych aerozoli wykonanych w kilku miejscach zlokalizowanych na terenach zurbanizowanych. Zastosowana aparatura pomiarowa umożliwiała wykonanie badań rozkładów ziarnowych w szerokim zakresie od kilku nanometrów do 20 žm obejmującym praktycznie całą frakcję cząstek respirabilnych. Uzyskane rezultaty wskazują, że w miejscach położonych blisko dróg o dużym natężeniu ruchu pojawiają się duże liczny nanometrowych aerozoli, których liczba ulega w czasie dużym wahaniom