Naslov
Influence of the atmospheric organic aerosols on the surfaces in the environment

Autori
Vidović, Kristijan ; Frka, Sanja ; Orlović-Leko, Palma

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

Skup
5th EuCheMS Chemistry Congres

Mjesto i datum
Istanbul, Turska, 31.08.2014. - 04.09.2014

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Organic aerosols ; Surface active substances ; Stone surface of the historical buildings ; Black crusts

Sažetak
Organic particles are either emitted directly into the atmosphere by fossil fuel or biomass combustion thus forming primary organic aerosols or are formed by gas-to-particle conversion from gaseous precursors leading to secondary organic aerosols. Surface active substances (SAS) as atmospheric organic compounds contribute significantly their water soluble organic carbon (WSOC) pool [1, 2]. Atmospheric composition is of unquestionable importance in the study of the damage produced on building materials of artistic interest [3]. Thus, atmospheric aerosols are known to accumulate on the stone surfaces of the historical buildings forming black crusts. Newly formed layers tend to have higher concentrations of organic carbon (OC) than elemental carbon (EC) as a result of recent atmospheric increase in organics [4].This work is focused on investigation of organic carbon (OC) present in the black crust of historic buildings from two urban sites: Zagreb (Croatia) and Jajce (Bosnia and Herzegovina). The black crusts were analyzed for total organic carbon (TOC), and the sub–fractions: WSOC and SAS. Characterization of water soluble organic surfactants was carried out by adsorption study at the mercury electrode/solution interface using electrochemical methods (phase sensitive alternating current voltammetry). For quantification of the SAS content a calibration plot of the non-ionic surfactant Triton-X-100 was used. The results will be supported by data showing the temporal distributions of organic aerosols (PM10) over the urban site of Zagreb, Croatia during one year (2011-2012) were estimated. We found that the mean organic carbon (OC) concentrations in autumn, winter, spring and summer, were 11.29 ± 8.2, 9.10±.4.40, 4.03 ±1.58, and 3.41±1.42 μg C m−3, respectively. The average OC/EC ratio was 6.6. Results show that humic-like matter (HULIS) may be an important surface active matter in atmospheric aerosols during warm seasons. Moreover, the presence of HULIS was also detected in the investigated samples of the black crust.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

POVEZANOST RADA