WFRF:(Eriksson Christina)
Sökning: WFRF:(Eriksson Christina) > (2020-2024) > Physicochemical met...
Physicochemical metamorphosis of re-aerosolized urban PM2.5
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- Bergman, Fanny (författare)
- Lund University,Lunds universitet,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,LTH profilområde: Aerosoler,LTH profilområden,Lunds Tekniska Högskola,LTH profilområde: Cirkulär byggindustri,LU profilområde: Ljus och material,Lunds universitets profilområden,Department of Clinical Sciences, Lund,Faculty of Medicine,LTH Profile Area: Aerosols,LTH Profile areas,Faculty of Engineering, LTH,LTH Profile Area: Circular Building Sector,Faculty of Engineering, LTH,LU Profile Area: Light and Materials,Lund University Profile areas,Lund University, Sweden
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- Eriksson, Axel C. (författare)
- Lund University,Lunds universitet,Metalund,Annan verksamhet, LTH,Lunds Tekniska Högskola,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Ergonomi och aerosolteknologi,Institutionen för designvetenskaper,Institutioner vid LTH,MERGE: ModElling the Regional and Global Earth system,Centrum för miljö- och klimatvetenskap (CEC),Naturvetenskapliga fakulteten,LTH profilområde: Aerosoler,LTH profilområden,LTH profilområde: Nanovetenskap och halvledarteknologi,LTH profilområde: Energiomställningen,LU profilområde: Ljus och material,Lunds universitets profilområden,Other operations, LTH,Faculty of Engineering, LTH,Other operations, LTH,Faculty of Engineering, LTH,Ergonomics and Aerosol Technology,Department of Design Sciences,Departments at LTH,Faculty of Engineering, LTH,Centre for Environmental and Climate Science (CEC),Faculty of Science,LTH Profile Area: Aerosols,LTH Profile areas,Faculty of Engineering, LTH,LTH Profile Area: Nanoscience and Semiconductor Technology,Faculty of Engineering, LTH,LTH Profile Area: The Energy Transition,Faculty of Engineering, LTH,LU Profile Area: Light and Materials,Lund University Profile areas,Lund University, Sweden
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- Spanne, Marten (författare)
- City of Malmö, Sweden
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- Elsevier Ltd, 2024
- 2024
- Engelska.
- Ingår i: Journal of Aerosol Science. - : Elsevier Ltd. - 0021-8502 .- 1879-1964. ; 181
- Tidskriftsartikel (refereegranskat)
Abstract
Ämnesord
Stäng
- The toxicity of particulate matter (PM) is dependent on particle physical and chemical properties and is commonly studied using in vivo and in vitro approaches. PM to be used for in vivo and in vitro studies is often collected on filters and then extracted from the filter surface using a solvent. During extraction and further PM sample handling, particle properties change, but this is often neglected in toxicology studies, with possible implications for health effect assessment. To address the current lack of knowledge and investigate changes in particle properties further, ambient PM with diameter less than 2.5 μm (PM2.5) was collected on filters at an urban site and extracted using a standard methanol protocol. After extraction, the PM was dried, dispersed in water and subsequently nebulized. The resulting aerosol properties were then compared to those of the ambient PM2.5. The number size distribution for the nebulized aerosol resembled the ambient in terms of the main mode diameter, and >90 % of particle mass in the nebulized size distribution was still in the PM2.5 range. Black carbon made up a similar fraction of PM mass in nebulized as in ambient aerosol. The sulfate content in the nebulized aerosol seemed depleted and the chemical composition of the organic fraction was altered, but it remains unclear to what extent other non-refractory components were affected by the extraction process. Trace elements were not distributed equally across size fractions, neither in ambient nor nebulized PM. Change in chemical form was studied for zinc, copper and iron. The form did not appear to be different between the ambient and nebulized PM for iron and copper, but seemed altered for zinc. Although many of the studied properties were reasonably well preserved, it is clear that the PM2.5 collection and re-aerosolization process affects particles, and thus potentially also their health effects. Because of this, the effect of the particle collection and extraction process must be considered when evaluating cellular and physiological outcomes upon PM2.5 exposure.
Ämnesord
- NATURVETENSKAP -- Kemi -- Annan kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Other Chemistry Topics (hsv//eng)
- MEDICIN OCH HÄLSOVETENSKAP -- Hälsovetenskap (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Health Sciences (hsv//eng)
Nyckelord
- Air pollution
- Chemical speciation
- Inhalation toxicology
- Methanol extraction
- XANES
- Aerosols; Air pollution; Chemical speciation; Copper; Extraction; Iron; Size distribution; Sulfur compounds; Trace elements; Urban growth; Ambient particulate Matter; Ambients; Health effects; In-vitro; In-vivo; Inhalation toxicology; Methanol extraction; Particle properties; Particulate Matter; XANES; Zinc
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- Bergman, Fanny
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- Spanne, Marten
- Ohlsson, Lena
- Mahmutovic Perss ...
- Uller, Lena
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- Rissler, Jenny
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