Naslov
Trends of ozone concentrations in the air of Zagreb, Croatia

Autori
Pehnec, Gordana ; Vađić, Vladimira ; Čačković, Mirjana ; Žužul, Silva

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

Izvornik
15th International Union of Air Pollution Prevention and Environmental Protection Associations'(IUAPPA) World Clean Air Congress, Abstract Book / - Vancouver : Air & Waste Management Association, 2010

Skup
15th International Union of Air Pollution Prevention and Environmental Protection Associations' (IUAPPA) World Clean Air Congress

Mjesto i datum
Vancouver, Kanada, 12.09.2010. - 16.09.2010

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Ambient air; photochemical pollution; traffic; urban area

Sažetak
Ozone (O3) is a secondary pollutant formed through photochemical reactions of nitrogen oxides and volatile organic compounds. As a strong oxidant, it may cause harmful health effects and damage plants and a variety of materials. O3 concentrations have been measured continuously in Zagreb, Croatia from 1999. This paper presents the results of O3 measurements at three urban locations (north, centre, and south) with different traffic density for the period 1999-2008. The measuring method used in this work is based on active sampling of ozone in the absorption solution of sodium nitrite. Nitrite ion reacts with ozone and forms a nitrate, which is then determined by ion chromatography. Over the whole measuring period, average annual O3 concentrations in Zagreb ranged between 20 μg m-3 and 40 μg m-3 in the north, between 19 μg m-3 and 3 μg m-3 in the city centre, and between 7 μg m-3 and 35 μg m-3 in the south. Over the spring and summer months, daily averages occasionally exceeded the Croatian limit value of 110 μg m-3. The highest daily value of 196 μg m-3 was measured in the city centre. In general, over the ten-year period, ozone concentrations in the south increased, while in the north and in the centre they showed a slow decrease in annual averages and in the annual number of days with exceeded limit values

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Javno zdravstvo i zdravstvena zaštita

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