Naslov
Occurrence of polycyclic aromatic hydrocarbons in the Sava River water and their accumulation in feral fish

Autori
Mikac, Iva ; Terzić, Senka ; Grubešić, Miloš-Saša ; Ahel, Marijan

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

Izvornik
Book of abstracts: International Conference on Environmental Research and Mitigation of Water Pollution in Romania and in the Lower Danube Region / - Bukurešt, 2008

Skup
International Conference on Environmental Research and Mitigation of Water Pollution in Romania and in the Lower Danube Region

Mjesto i datum
Bukurešt, Rumunjska, 03.09.2008. - 05.09.2008

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
Sava; policiklički aromatski ugljikovodici; bioakumulacija
(The Sava River; PAHs; bioaccumulation)

Sažetak
Polycyclic aromatic hydrocarbons (PAHs) belong to the most common classes of environmental pollutants. They enter the environment from various sources, but it is widely accepted that pyrolytic processes represent the main pattern for the introduction of ecotoxicologically most important PAHs into the natural aquatic systems. Like many other types of environmental pollutants, PAHs encompass a very complex group of related compounds, covering a wide range of physico-chemical properties and possible ecotoxicological implications. Despite numerous reports on the occurrence of PAHs in various environmental compartments and clear indications that their presence in the aquatic systems may result in measurable biochemical responses in the aquatic biota, the quantitative aspects of the mechanisms, leading to harmful biological effects, are still poorly understood. The aim of this study was the assessment of the exposure levels of PAHs in the Sava River and their accumulation and metabolic transformation in feral fish. The study was focused on 16 unsubstituted PAH and included their determination in water and tissues of the European chub (Leuciscus cephalus). Fish analyses encompassed determination of untransformed parent PAHs in muscle and liver as well as the corresponding hydroxylated metabolites (OH-PAH) in fish bile. This report covers four sampling campaigns, performed in the time period from March 2005 to September 2006 in the framework of the interdiciplinary EU FP 6 Project on Sava River Basin: Sustainable use, management and protection of resources (SARIB). The results revealed that the Sava River was moderately polluted with PAHs with exposure water concentrations of individual PAH in the low ng/L. The most prominent higher PAHs in water were phenanthrene, pyrene and fluoranthene. The same individual PAHs were found as the most abundant ones in both muscle and liver tissues of the chub, however the observed bioconcentration factors (BCFs) were relatively modest with respect to comparatively high octanol-water partition coefficients (Kow) of investigated compounds. A comparison of the observed BCFs of PAHs in fish with their accumulation in passive samplers, based on semipermeable membrane devices (SPMD) filled with trioleine, indicated biotransformation of PAHs as the most probable mechanism, leading to the lower apparent BCFs. Indeed, the concentration of the hydroxylated metabolites in bile was significant with total concentrations exceeding 2000 ng/mL. The most prominent individual OH-PAH was 1-OH-pyrene. The hydroxylated PAHs proved to be the most sensitive parameter to reveal the extent of the PAH pollution in the Sava River and to describe the existing exposure gradients. Moreover, a significant correlation of OH PAH with EROD activity was observed1. The results obtained in different seasons indicate that physiological and/or reproductive status of the chub play an important role in the distribution of PAHs in fish tissues.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

POVEZANOST RADA