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Picer, Mladen; Picer, Nena; Čalić, Violeta; Hodak Kobasić, Vedranka; Cenčić Kodba, Zdenka
09/2006Publication
In the recent war in Croatia, the karstic area of the country was endangered by hazardous waste, which calls for particular attention because of its exceptional ecological sensitivity. There are strong indications that various organic pollutants have entered the environment. It is also assumed that oil containing polychlorinated biphenyls (PCBs) was spilled in a number of locations. After the penetration in the environment, these substances are quickly absorbed in soil, sediment or bioaccumulated in the organisms of the aquatic ecosystem. In view of the locations of damaged electric transformer stations in Zadar, Bilice and Dubrovnik, there was some speculation on potential hazard posed by organohalogenated toxicants to Lake Vransko and the coastal area around Zadar, Šibenik and Dubrovnik. Samples of sediments and aquatic organisms were collected and analysed, and the results showed no significant or high levels of contaminants in the areas of Lake Vransko, Šibenik, and Dubrovnik (Petka location), while in the Mikulandra Bay near Šibenik, in Rijeka Dubrovaèka, Brodanovo location and Marina near the Vruljica Creek in Zadar, significantly higher levels of PCBs were observed and these toxicants were additionally monitored within the APOPSBAL project from 2002 to 2005. The results of these investigations are presented in this paper. Tijekom nedavnog rata krško područje Hrvatske bilo je ugroženo opasnim otpadom pa zahtijeva osobitu pažnju zbog izuzetne ekološke osjetljivosti. Postoje čvrste naznake da su različita organska zagađivala dospjela u okoliš. Također se pretpostavlja da je ulje koje sadržava poliklorirane bifenile (PCB) proliveno na nekoliko lokacija. Nakon prodiranja u okolinu, ovi se spojevi brzo apsorbiraju u tlu, sedimentu ili se bioakumuliraju u organizmima vodenog ekosustava. Uzimajući u obzir lokacije uništenih trafostanica u Zadru, Bilicama i Dubrovniku, postojala su nagađanja o daljnjem prodiranju organohalogeniranih otrovnih tvari i potencijalnoj ugroženosti Vranskog jezera te obalnog mora oko Zadra, Šibenika i dubrovačkog područja. Sedimenti i neki vodeni organizmi skupljeni su sa spomenutih područja i analizirani. Rezultati su pokazali da ne postoji značajna zagađenost, odnosno nisu utvrđene visoke razine ovih zagađivala u područjima Vranskog jezera, grada Šibenika i Dubrovnika (lokacija Petka), dok je u zaljevu Mikulandra blizu Šibenika, Rijeci Dubrovačkoj, Brodanovu i Marini blizu Vruljice u Zadru, opažena značajno viša razina PCB-a. Iz tih razloga tijekom 2002. do 2005. godine vršena su mnogobrojna uzorkovanja i analiza ovih spojeva u zraku, zemljištu, sedimentima i organizmima zadarskog i dubrovačkog područja unutar projekta APOPSBAL koji je financirala Europska komisija. Rezultati ovih istraživanja prikazani su u ovome radu.
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