Naslov
Relationship between polycyclic aromatic hydrocarbons and other pollutants in the air of Zagreb, Croatia

Autori
Pehnec, Gordana ; Šišović, Anica ; Bešlić, Ivan ; Jakovljević, Ivana ; Vađić, Vladimira

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Abstracts of the 4th International Symposium & IUAPPA Regional Conference "Air Quality Management at Urban, Regional and Global Scales / Incecik, Selahattin ; Kahya, Ceyhan - Istanbul : Istanbul Technical University (ITU) ; Turkish National Committee for Air Pollution and Control (TUNCAP), 2012

Skup
4th International Symposium & IUAPPA Regional Conference "Air Quality Management at Urban, Regional and Global Scales

Mjesto i datum
Istanbul, Turska, 10.09.2012. - 13.09.2012

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
meteorology; multiple linear regression; nitrogen dioxide; ozone; PM10

Sažetak
Polycyclic aromatic hydrocarbons (PAHs) are formed during incomplete combustion or pyrolysis of organic matter. In the atmosphere, PAHs with five or more aromatic rings are mostly bonded to particles. During summer, some PAHs engage in oxidation and photooxidation reactions, including reactions with ozone. In this study, concentrations of eight PAHs in PM10 particle fraction were measured together with ozone and nitrogen dioxide concentrations at an urban site. The aim of the paper was to find the relationship between the measured pollutants and selected meteorological parameters. The measuring site was in the northern, residential part of Zagreb, Croatia, with modest traffic density. PM10 particle fraction was collected by 24-hour sampling on quartz filters in the period 1 January – 31 December 2009. The samples were kept frozen in aluminium foil at -18 ºC until HPLC analysis with fluorescence detection and changeable excitation and emission wavelength. Nitrogen dioxide and ozone concentrations were measured using automatic devices based on chemiluminiscence and UV absorption, respectively. In 2009, daily ozone mass concentrations ranged from 3 to 98 μg/m3, and the limit value for 8-hour averages (120 μg/m3) was trespassed only once. Concentrations in spring and summer were statistically higher than in other seasons. 24-hour averages of NO2 mass concentrations ranged between 9 and 90 μg/m3 and were highest in winter. All PAHs showed seasonal variations with high concentrations in winter and very low concentrations during summer months. All eight PAHs were found to correlate well with each other (correlation coefficients between 0.79 and 0.99). Statistically significant negative correlation was found between all PAHs and ozone and PAHs and temperature, and positive correlation between PAHs and nitrogen dioxide and relative humidity. Multivariate regression analysis showed that measured variables accounted for 57 to 70 % of PAH variability.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Javno zdravstvo i zdravstvena zaštita

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