scholarly journals Estimation of the Size Distribution of Suspended Particulate Matters in the Urban Atmospheric Surface Layer and Its Influence on Bronchopulmonary Pathology

Atmosphere ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 1010
Author(s):  
Lyudmila V. Veremchuk ◽  
Tatyana I. Vitkina ◽  
Lyudmila S. Barskova ◽  
Tatyana A. Gvozdenko ◽  
Elena E. Mineeva
Keyword(s):  
Air Pollution ◽  
Surface Layer ◽  
Size Distribution ◽  
Atmospheric Surface Layer ◽  
Particulate Matters ◽  
Technogenic Pollution ◽  
Suspended Particulate ◽  
High Level ◽  
The City ◽  
Suspended Particulate Matters

The surface layer of the urban atmosphere significantly affects human health. Its quality depends on the level of air pollution. The aim was to determine the size distribution of suspended particulate matters (SPMs) in the atmospheric surface layer of Vladivostok city and to assess the response of the blood immune and metabolic parameters of the population with bronchopulmonary pathology. Sampling of SPMs was conducted in the continental zone of the city with a high level of technogenic pollution (138 samples) and the island part of the city with an insignificant level of technogenic pollution (132 samples). The SPM fractional composition was analyzed by laser granulometry. We examined patients with bronchopulmonary pathology living in a one-kilometer zone centered on sampling area for at least 5 years (continental territory—220 patients, island territory—176 patients). We calculated the D% index characterizing the integral response of the blood immune and metabolic parameters to the exposure of dust fractions. It was found that PM > 10 (mainly of a natural origin) predominate in the island zone with insignificant level of technogenic pollution. The PM10 fraction prevails in the area with a high level of technogenic pollution. The response of the immune and metabolic systems to the exposure to microparticles in population living in the marine and forest/park zone of the island indicates a health-improving effect of the area. Low values of D% were detected for the patients living in the area with a high air pollution level, indicating a pathogenic reaction of immune and prooxidant-oxidative systems.

Inorganic and organic chemical characteristics and sources of suspended particulate matters in Ulaanbaatar, Mongolia

2020 ◽  
Vol 54 (4) ◽  
pp. 267-276
Author(s):  
Koshi Yamamoto ◽  
Yuta Suzuki ◽  
Gochoobazar Oyunjargal ◽  
Hiroyuki Fukuda ◽  
Munkhtsetseg Oidov ◽  
...  
Keyword(s):  
Organic Chemical ◽  
Chemical Characteristics ◽  
Particulate Matters ◽  
Suspended Particulate ◽  
Suspended Particulate Matters ◽  
Inorganic And Organic

scholarly journals Biophysical flocculation of suspended particulate matters in Belgian coastal zones

2018 ◽  
Vol 567 ◽  
pp. 238-252 ◽  
Author(s):  
Xiaoteng Shen ◽  
Erik A. Toorman ◽  
Byung Joon Lee ◽  
Michael Fettweis
Keyword(s):  
Particulate Matters ◽  
Coastal Zones ◽  
Suspended Particulate ◽  
Suspended Particulate Matters

Reduction Effects of Suspended Particulate Matters in Air by Thermal Moisture Swing Method

2011 ◽  
Author(s):  
Nagisa Onoda ◽  
Shota Ishiguchi ◽  
Osamu Nakabeppu
Keyword(s):  
Particle Size ◽  
Energy Consumption ◽  
Simple Model ◽  
Experimental Result ◽  
Particulate Matters ◽  
Removal Mechanism ◽  
Air Cleaning ◽  
Suspended Particulate ◽  
Suction Flow ◽  
Suspended Particulate Matters

We are studying the effects of thermal moisture swing air-cleaning method on removal of suspended particulate matter, SPM. This method continuously humidifies sample air with heating and dehumidifies it by cooling, in a channel. It was experimentally demonstrated that the thermal moisture swing method reduces SPM suspended in sample air. The experimental result showed reduction of SPM above 10 nm in particle size, and the removal ratio increased with intensifying the thermal moisture swing. The SPM removal mechanism of this method was theoretically estimated. The estimation suggests that the reasons for the SPM reduction are suction flow accompanying condensation and thermophoresis. These phenomena would transport SPM to cooling wall of the dehumidifier. Also, diffusional deposition and gravitational sedimentation would transport SPM to the wall of the channel. And, the transported particles are separated from the air with adhering on the wall. We estimated the effects of these phenomena on SPM removal using simple model and energy consumption. The estimation qualitatively agreed with the experimental result.

Variation in Size Distribution of Suspended Particulate Matters in Air With Humidity Swing Operation

2010 ◽  
Author(s):  
Nagisa Onoda ◽  
Osamu Nakabeppu
Keyword(s):  
Particulate Matters ◽  
Nuclear Condensation ◽  
Cleaning Method ◽  
Air Cleaning ◽  
Submicron Size ◽  
Suspended Particulate ◽  
Spm Concentration ◽  
Suction Flow ◽  
Nano Size ◽  
Suspended Particulate Matters

The aim of this study is to develop a new air cleaning method being applicable to suspended particulate matters (SPM) of wide sizes. We experimentally studied about the effects of a humidity swing operation where sample air is continuously humidified with heating and dehumidified with cooling. The total of SPM concentration of sample air decreased with the humidity swing operation; however, the concentration of SPM from 0.3 to 1 μm markedly increased. Suction flow accompanying condensation, cohesion and thermophoresis were considered as the SPM reduction effects. It would appear that the nano-size SPM grew to submicron size by nuclear condensation and submicron size SPM increased. The experimental results showed that the SPM concentration of 0.3 μm or less decreased by 89% and the total of that decreased by 80%. The applicability of the humidity swing operation to removal of SPM including nano size SPM was shown by the results. Also, exponential reduction of the SPM concentration was demonstrated with applying the repeated humidity swing operation in a circulation air-cleaning apparatus. This method is expected to become effective air cleaning method applicable to wide size range of SPM.

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