Ispitivanje svojstava i utjecajnih faktora na koncentracije i veličinsku distribuciju ultrafinih lebdećih čestica tijekom zimskog razdoblja u gradu Zagrebu

master's thesis

• Title (english): Investigation of the properties and factors affecting concentrations and size distribution of ultrafine aerosol particles during winter in the city of Zagreb
• Author: Robert Horn
• Mentor: Sanja Frka Milosavljević (mentor)
• Committee member: Iva Juranović Cindrić (predsjednik povjerenstva)
• Committee member: Đani Škalamera (član povjerenstva)
• Committee member: Adriana Kenđel (član povjerenstva)
• Committee member: Mirta Rubčić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Chemistry); Zagreb
• Defense date and country: 2024-06-19, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Chemistry

Abstract

Ultrafine lebdeće čestice promjera manjeg od 100 nm (PM0,1) nastaju direktnom emisijom iz prirodnih/antropogenih izvora i/ili sekundarnim procesima iz plinova u atmosferi. Prvo ispitivanje ultrafinih lebdećih čestica u Zagrebu provedeno je u stvarnom vremenu primjenom skenirajućeg sustava za određivanje veličine čestica u razdoblju od 5. siječnja do 15. veljače 2024. Etalometar je omogućio mjerenja crnog ugljika u česticama (indikator izgaranja biomase i fosilnih goriva) u stvarnom vremenu dok su kaskadnim uzorkovačem sakupljene veličinske frakcije lebdećih čestica (od 10 nm do 32 μm) kojima je gravimetrijskom metodom određena masa te koncentracije organskog ugljika primjenom visokotemperaturne katalitičke oksidacije. Dobiveni podaci uspoređeni su s meteorološkim podacima te koncentracijama PM10, PM2,5, NO2, SO2 i O3. Statističkom obradom podataka omogućen je uvid u promjenjivost koncentracija ultrafinih čestica, uključujući njihove nukleacijske (PM0,02) i Aitkenove (PM0,02-0,1) frakcije te razlučivanje dominantnih utjecaja na njihovo stvaranje i starenje u gradu Zagrebu.

Abstract (english)

Ultrafine aerosol particles (diameter < 100 nm, PM0,1) are emitted directly from natural/anthropogenic sources and/or formed by secondary processes from gasses in the atmosphere. The first real time investigation of ultrafine particles in Zagreb was conducted using a Scanning Mobility Particle Sizer (SMPS) system from January 5 to February 15, 2024. Real time black carbon (indicator of biomass burning and fossil fuel combustion) was measured using an aethalometer, while aerosol size fractions (10 nm to 32 μm) collected using a cascade impactor were analysed by gravimetric methods to determine the mass and by high-temperature catalytic oxidation to determine the concentration of organic carbon. The data obtained were correlated with meteorological data and concentrations of PM10, PM2.5, NO2, SO2, and O3. Statistical analysis provided insights into the variability of ultrafine particle concentrations, including their nucleation (PM0.02) and Aitken (PM0.02-0.1) fractions, and enabled identification of dominant factors influencing their formation and aging in Zagreb.

• Keywords: crni ugljik; onečišćenje zraka; organska tvar; raspodjela izvora; ultrafine lebdeće čestice; urbana atmosfera
• Keywords (english): air pollution; black carbon; organic carbon; source apportionment; ultrafine particles; urban atmosphere
• Language: croatian
• URN:NBN: urn:nbn:hr:217:841548
• Project: Number: IP-2018-01-3105; Title: Biokemijski odgovori površinskog sloja oligotrofnog područja Jadranskog mora na atmosfersko taloženje; Acronym: BiREADI; Leader: Sanja Frka Milosavljević; Jurisdiction: Croatia; Funder: Hrvatska zaklada za znanost; Funding stream: Research Projects
• Study programme: Title: Graduate university studies in chemistry; specializations in: Graduate university studies in chemistry; Course: Graduate university studies in chemistry; Study programme type: university; Study level: graduate; Academic / professional title: sveučilišni/a magistar/magistra kemije (sveučilišni/a magistar/magistra kemije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Embargoed access; Embargo expiration date: 2026-06-19
• Created on: 2024-06-25 09:11:34