Search results for "PM2.5"
showing 10 items of 21 documents
ATR–FTIR Spectral Analysis and Soluble Components of PM10 And PM2.5 Particulate Matter over the Urban Area of Palermo (Italy) during Normal Days and …
2019
Several epidemiological studies have shown a close relationship between the mass of particulate matter (PM) and its effects on human health. This study reports the identification of inorganic and organic components by attenuated total reflectance-Fourier-transform infrared spectroscopy (ATR-FTIR) analysis in PM10 and PM2.5 filters collected from three air quality monitoring stations in the city of Palermo (Sicily, Italy) during non-Saharan dust events and Saharan events. It also provides information on the abundance and types of water-soluble species. ATR-FTIR analysis identified sulfate, ammonium, nitrate, and carbonate matter characterized by vibrational frequencies at 603, 615, 670, and …
Study on ambient concentrations of PM10, PM10-2.5, PM2.5 and gaseous pollutants. Trace elements and chemical speciation of atmospheric particulates
2010
Abstract This study provides the first comprehensive report on mass concentrations of particulate matter of various sizes, inorganic and organic gas concentrations monitored at three sampling sites in the city of Palermo (Sicily, Italy). It also provides information on the water-soluble species and trace elements. A total of 2054 PM10 (1333) and PM2.5 (721) daily measurements were collected from November 2006 to February 2008. The highest mass concentrations were observed at the urban stations, average values being about two times higher than those at the suburban (control) site. Time variations in PM10 and also PM10–2.5 were observed at the urban stations, the highest concentrations being …
Estimates, trends, and drivers of the global burden of type 2 diabetes attributable to PM2·5 air pollution, 1990–2019: an analysis of data from the G…
2022
Background: Experimental and epidemiological studies indicate an association between exposure to particulate matter (PM) air pollution and increased risk of type 2 diabetes. In view of the high and increasing prevalence of diabetes, we aimed to quantify the burden of type 2 diabetes attributable to PM2·5 originating from ambient and household air pollution.Methods: We systematically compiled all relevant cohort and case-control studies assessing the effect of exposure to household and ambient fine particulate matter (PM2·5) air pollution on type 2 diabetes incidence and mortality. We derived an exposure–response curve from the extracted relative risk estimates using the MR-BRT (meta-regress…
Indoor air quality in schools of a highly polluted south Mediterranean area
2019
This study aimed at surveying lower secondary schools in southern Italy, in a highly polluted area. A community close to an industrial area and three villages in rural areas was investigated. Indoor temperature, relative humidity (RH), gaseous pollutants (CO 2 and NO 2 ), selected biological pollutants in indoor dust, and the indoor/outdoor mass concentration and elemental composition of PM 2.5 were ascertained. Temperature and RH were within, or close to, the comfort range, while CO 2 frequently exceeded the threshold of 1000 ppm, indicating inadequate air exchange rate. In all the classrooms, median NO 2 levels were above the WHO threshold value. Dermatophagoides p. allergen concentration…
Analysis of airborne particulate matter: application of Fourier Transform Infrared (FT-IR) spectroscopy and selected geochemical techniques
2010
Design of experiment approach for the optimization of polybrominated diphenyl ethers determination in fine airborne particulate matter by microwave-a…
2015
Abstract A sensitive and selective procedure for the determination of 12 polybrominated diphenyl ethers (BDE-28, BDE-49, BDE-47, BDE-66, BDE-100, BDE-119, BDE-99, BDE-155, BDE-154, BDE-153, BDE-139 and BDE-183) in airbone particulate matter (PM2.5) at trace level has been developed. The proposed method includes extraction PM2.5-bound PBDEs by microwave-assisted extraction (MAE) followed by gel permeation chromatography (GPC) clean-up and determination by GC-MS/MS using a programmed temperature vaporizer (PTV) in large volume injection (LVI) mode to introduce the sample to the chromatographic system. A design of experiment (DoE) approach was used for the optimization of large volume injectio…
Relationship between domestic smoking and metals and rare earth elements concentration in indoor PM2.5
2018
Cigarette smoke is the main source of indoor chemical and toxic elements. Cadmium (Cd), Thallium (Tl), Lead (Pb) and Antimony (Sb) are important contributors to smoke-related health risks. Data on the association between Rare Earth Elements (REE) Cerium (Ce) and Lanthanum (La) and domestic smoking are scanty. To evaluate the relationship between cigarette smoke, indoor levels of PM2.5 and heavy metals, 73 children were investigated by parental questionnaire and skin prick tests. The houses of residence of 41 "cases" and 32 "controls" (children with and without respiratory symptoms, respectively) were evaluated by 48-hours PM2.5 indoor/outdoor monitoring. PM2.5 mass concentration was determi…
Cieto daļiņu atmosfēras piesārņojuma mainība autotransporta ietekmes rezultātā Jēkabpilī
2018
Bakalaura darba ietvaros izvērtēts autotransporta radītais gaisa piesārņojums Jēkabpils pilsētā. Pētījums veikts, galvenokārt, lai novērtētu tranzīta radīto piesārņojumu un tā izplatību apbūvētās teritorijās. Darba mērķis ir izvērtēt gaisa piesārņojuma no autoceļiem galveno vides parametru transporta radīto cieto daļiņu (PM) koncentrāciju. Emisiju apjoma novērtēšanai izmantot manuāli satiksmes intensitātes mērījumi, vizuāli uzskaitot autotransporta līdzekļus. Iegūtie dati statistiski apstrādāti, izveidojot raksturīgos diennakts transporta plūsmu profilus dažādām automašīnu klasēm. Darbā izmantoti Latvijas Republikas Centrālās statistikas pārvaldes dati par transportlīdzekļu skaitu, autotran…
Atmosfēras piesārņojuma dozimetriskais novērtējums
2022
Bakalaura darba “Atmosfēras piesārņojuma dozimetriskais novērtējums” ir apkopota zinātniskā literatūra par atmosfēras piesārņojumu pilsētvidē, tā ietekmi uz cilvēku veselību, meteoroloģisko parametru ietekmi uz gaisa kvalitāti, maršruta izvēles nozīmi, lai mazinātu uzņemto gaisa piesārņojuma daudzumu. Darba praktiskajā daļā veikti mērījumi piesārņotājiem PM2.5, PM10, PM1 un gaistošajiem organiskajiem savienojumiem laika periodā no 03.10.2021. līdz 14.04.2022. dažādās nedēļas dienās un ekspozīcijas laikos. Mērījumi veikti, izmantojot personificētu gaisa piesārņojuma mērītāju dozimetru. Iegūtie piesārņojošo vielu koncentrāciju mērījumi analizēti, izmantojot korelāciju analīzi un dispersijas a…