Naslov
Levels of POPs in air, soil and sediment of Zadar, Dubrovnik and Western Slavonija area

Autori
Kovač, Tatjana ; Picer, Nena ; Picer, Mladen ; Cencič Kodba, Zdenka ; Čalić, Violeta ; Kralik, Martin ; Holoubek, Ivan

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

Izvornik
Workshop of Croatian-Norwegian project: Mitigation of environmental consequences of the war in Croatia &#8211 ; Risk assessment of hazardous chemical contamination, Zagreb, 26-27 September, 2005 / - , 2005, 17-18

Skup
Workshop of Croatian-Norwegian project: Mitigation of environmental consequences of the war in Croatia &#8211 ; Risk assessment of hazardous chemical contamination

Mjesto i datum
Zagreb, Hrvatska, 26.09.2005. - 27.09.2005

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
POPs; zrak; tlo; sediment; Zadar; Dubrovnik; zapadna Slavonija
(POPs; air; soil; sediment; Zadar; Dubrovnik; western Slavonia)

Sažetak
During the recent war, the karst area of Croatia has been jeopardized by hazardous waste. The results of analyses of the PCB in the soil of the Zadar area point to the pollution of certain locations of explored area with the PCB. Very serious contamination of soil was found around damaged electro transformer station in Zadar with levels of the PCB up to 6044 ppm. This was the reason for the detailed investigation of this site for the PCB levels in the soil and air samples. Investigations are performed on 4 locations in the town Zadar and at the Zavižan location on Mt. Velebit also. The level of PCB in the soil and atmosphere of certain localities in the town Zadar is not significantly different compared to the area of the top Zavižan on Mt. Velebit. PCB levels in the atmosphere of the ETS Zadar are significantly higher than in the other localities. Comparison of the PCB levels measured in the soil samples collected and the air samples showed good agreement. At Zadar area besides ETS Zadar, several points where soil is seriously contaminated with PCB have been found. Levels of the PCB in the soil of the investigated locality TIZ are alarming (even around the 1000 ppm) and the pollution problem with the PCB exists. However, in soil samples from the BAGAT factory and from the metal waste deposit are found elevated concentrations of PCB (the range from 3-6 ppm of total PCB). In soil samples from the waste field in the port Gaženice the found level of the PCB is up to the 1 ppm. Town Zadar is situated on karstic ground and there are possibilities that PCB could be transferred through such porous media to near sea, so investigation of the distribution of PCB in coastal sediment was performed. Comparison of distributions of the 7 key congeners of PCBs in Marina and coastal sediments indicate significantly contaminated Marina and Jazine area. Surface layer (0-5 cm) of one sediment sample from Marina has shown significant pollution with PCBs (3283, 39 ppb). All other surface samples of Marina had lower levels of PCBs. In later investigations we registered the visible decrease of the concentration in respect to the previous results. At one of the location in Jazine the very high level of PCBs in the surface layer of sediment has been found (the sum 7 PCB is 1350 ppb) and surprisingly very high level of the sum of the 7 PCB in the deeper layer of sediment (2938 ppb). Results indicate that the PCB-content increases with depth. During the war devastation in the Dubrovnik area the attack on TS “ Komolac” completely destroyed plant in which condenser batteries where found PCB. Two locations differing considerably are investigated. Samples collected on Petke location did not show increased levels of the PCB. Stations in Rijeka Dubrovačka, on the positions closest to the transformer station (reservation and the estuary of Slavijan creek) also do not indicate significant PCB levels but sediment in marina area, show relatively high PCB levels. Sediment from one station in Rijeka Dubrovačka near Sustjepan location showed very high level of PCB (2594 ppb). That was a reason for carrying out the detailed analysis of PCB in coastal waste and sediments on the locality around the deposited waste. Results of analyses indicate the increased pollution of that locality. Levels of PCB in a few sediments was high (the 209 ppb). That results indicate that the possible source of the polutions of that area with PCB is waste delayed near the coast, whose origin is from destroyed TS Komolac. In Western Slavonia are identified some locations which are polluted by PCB. Found levels of the PCBs are not negligible and exists the possibility for jeopardizing the aquatic ecosystem. Very high levels of PCBs have been found in the soil from Šagovina Mašićka (1688 ppm), and in the soil sample from Medari (1784 ppm). Significant levels of PCBs are observed in soil sample from Gorice (442 ppm). The most probable origin of these contaminations is closeness to the spots where the oil has leaked from damaged capacitors.

Izvorni jezik
Engleski

Znanstvena područja
Geologija, Kemija

POVEZANOST RADA