Naslov
Determination of the atmospheric deposition of polycyclic aromatic hydrocarbons and polychlorinated biphenyls

Autori
Šimić, Iva ; Mendaš Starčević, Gordana ; Pehnec, Gordana

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

Izvornik
26. hrvatski skup kemičara i kemijskih inženjera / Galić, Nives ; Rogošić, Marko - Zagreb : Hrvatsko društvo kemijskih inženjera i tehnologa (HDKI), 2019, 230-230

ISBN
978-953-6894-67-3

Skup
26. hrvatski skup kemičara i kemijskih inženjera (26HSKIKI) ; 4. simpozij Vladimir Prelog

Mjesto i datum
Šibenik, Hrvatska, 09.04.2019. - 12.04.2019

Vrsta sudjelovanja
Poster

Vrsta recenzije
Domaća recenzija

Ključne riječi
PAHs ; PCBs ; solid‐phase extraction

Sažetak
Atmospheric deposition represents an important removal mechanism from the atmosphere to the aquatic and terrestrial systems, and therefore is of great environmental concern. The presence of polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) in bulk atmospheric deposition (wet and dry) represents a significant portion of waterbody contamination. The PAHs have gained much attention due to their mutagenic and carcinogenic potentials and have therefore been included in the European Union and United States Environmental Protection Agency (EPA) priority pollutant list. PCBs are widespread, highly persistent chemicals with harmful effects on the ecosystem and human health. They are prone to long‐range transport by circulation of air masses, deposition on particles to which they are sorbed and wet and dry deposition washing them out from the atmosphere. The aim of this study was at developing and validating a method for the extraction and determination of 12 PAHs (fluoranthene, pyrene, benz(a)anthracene, chrysene, benzo(b)fluoranthene, benzo(k)fluoranthene, benzo(j)fluoranthene, benzo(a)pyrene, benzo(e)pyrene, indeno(1, 2, 3‐ cd)pyrene, dibenz(a, h)anthracene and benzo(g, h, i)perylene)and 6 indicator PCBs congeners (PCB‐28, PCB‐52, PCB‐101, PCB‐138, PCB‐153 and PCB‐180) in deposition samples. The sample preparation was optimized for final analysis by gas chromatography (GC) with electron capture detector (ECD) (for PCBs) and mass spectrometric (MS) detection (for PAHs). Different solid‐phase extraction procedures were investigated and compared by analysing a model deposition sample. The fortified samples with surrogate standard (perylene‐d12), PAHs and PCBs in mass concentrations of 0.05 ng ml– 1, were forced through a silica solid phase extraction cartridge. To achieve the best extraction procedure efficiency, the elution of retained compounds with different solvents was investigated. The best results were by elution with solvent mixture dichloromethane : n‐hexane (1:1, v/v). The eluate was dried with anhydrous sodium sulphate, reduced to 2 mL under nitrogen and then analysed by GC‐MS/MS and GC‐ECD. The mass concentrations of PAHs were determined by internal standard method. The extraction recoveries for PCBs and PAHs were higher than 80% except for BeP, while the recovery of surrogate standard was higher than 50%. The detection limits obtained for PCBs and PAHs were from 0.07 ng m–2d–1 to 0.33 ng m–2d–1 and from 0.27 ng m–2d–1 to 1.44 ng m–2d–1, respectively. The method was successfully applied to determine 12 PAHs and 6 PCBs in the bulk atmospheric deposition sampled from an urban background station in Zagreb.

Izvorni jezik
Engleski

Znanstvena područja
Javno zdravstvo i zdravstvena zaštita

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