Air pollution is currently the most significant environmental factor posing a threat to the health and lives of European residents. It is a key cause of poor health, particularly respiratory and cardiovascular diseases. The primary aim of the study was to numerically determine the impact of the air purifier model's geometry on the distribution of air within a room and to conduct experimental tests on the filtration efficiency and preliminary antibacterial activity of filtration composites. The scope of the work included designing an air purifier model in the form of a pendant lamp and performing computer simulations in Ansys software to identify the optimal shape. The experimental research focused on developing filtration composites consisting of nonwoven fabric with an active hydrosol layer, meltblown nonwovens and a carbon filter. The study results showed that the SMMS composite with 50% thyme and carbon nonwoven exhibited the highest filtration efficiency for both small and large particles.
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http://dx.doi.org/10.3390/ma17204969 | DOI Listing |
Small
December 2024
School of Energy and Environment, Southeast University, Nanjing, Jiangsu, 210096, China.
Submicron particulate matter (PM) can penetrate deeply into human tissue, posing a serious threat to human health. However, the electrostatic charge of commercial respirators is easily dissipated, making it difficult to maintain long-term filtration. Herein, a hierarchically porous filter based on nanofibers with accessible porosity and particulate-attractive surfaces, achieving significant filtration performance is developed through polarity-driven interactions.
View Article and Find Full Text PDFSe Pu
January 2025
School of Public Health, Wuhan University, Wuhan 430071, China.
Industrialization has led to significant increases in the types and quantities of pollutants, with environmental pollutants widely present in various media, including the air, food, and everyday items. These pollutants can enter the human body via multiple pathways, including ingestion through food and absorption through the skin; this intrusion can disrupt the production, release, and circulation of hormones in the body, resulting in a range of illnesses that affect the reproductive, endocrine, and nervous systems. Consequently, these pollutants pose substantial risks to human health.
View Article and Find Full Text PDFSci Total Environ
December 2024
Department of Chemistry and Biochemistry, Brigham Young University (BYU), Provo, UT, USA, 84602. Electronic address:
The Great Salt Lake (Utah, USA) is reducing in size, which raises several ecological concerns, including the effect of an increasing area of dry playa exposed by the retreating lake. This study focuses solely on concerns about the toxicity of metals in the dust blowing off the playa. Although considerable efforts have been made to understand aeolian dust in urban areas along the Wasatch Front, located just east and south of the Great Salt Lake, there is still a need to consolidate existing research and to conduct a compositional analysis of the dust found in these urban areas.
View Article and Find Full Text PDFMin Metall Explor
November 2024
Department of Environmental Health Sciences, University of California, Los Angeles, Los Angeles, CA USA.
Unlabelled: This assessment was designed to explore and characterize the airborne particles, especially for the sub-micrometer sizes, in an underground coal mine. Airborne particles present in the breathing zone were evaluated by using both (1) direct reading real-time instruments (RTIs) to measure real-time particle number concentrations in the workplaces and (2) gravimetric samplers to collect airborne particles to obtain mass concentrations and conduct further characterizations. Airborne coal mine particles were collected via three samplers: inhalable particle sampler (37 mm cassette with polyvinyl chloride (PVC) filter), respirable dust cyclone (10 mm nylon cyclone with 37 mm Zefon cassette and PVC filter), and a Tsai diffusion sampler (TDS).
View Article and Find Full Text PDFJ Environ Manage
December 2024
Appalachian State University, Department of Economics, Boone, NC, USA. Electronic address:
This paper investigates individuals' averting behavior that utilizes a durable good, high-functioning air purifiers, to reduce risk from exposure to coarse (PM) and fine (PM) particulate matter, to estimate a value of statistical life (VSL) for use in benefit-cost analysis in South Korea. We present an interactive risk ladder, developed specifically for this study, to 1218 respondents in a national web-based contingent valuation survey to elicit their perceived risks from the exposure to PM and PM with and without the use of high-functioning air purifiers (i.e.
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