Naslov
Preparing investigation field with pcb PCB contaminated soil for phytoremediation research

Autori
Picer, Mladen ; Tarnik, Tamara ; Kovač, Tatjana

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

Izvornik
Persistent Toxic Substances Contamination of the European Region - Book of abstracts (appendix) / - Brno : Masaryk University, 2003

Skup
Persistent Toxic Substances Contamination of the European Region - The first workshop

Mjesto i datum
Brno, Češka Republika, 10.11.2003. - 12.11.2003

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
PCB; soil; phytoremediation

Sažetak
During the recent war, the karst area of Croatia has been jeopardized by hazardous waste and deserves particular attention because of its exceptional ecological sensitivity and unfortunately unscrupulous destruction of natural resources, infrastructure, homes and enterprises. There are great fears and concrete evidence those significant quantities of polychlorinated biphenyls were released in the environment during warfare. Results of the analysis of polychlorinated biphenyls in soil from numeral locations (on some locations, on two depths), indicate significant contamination of the investigated area TS 110/35 kV - Zadar. It was reason for thoroughly investigation this site for levels of PCBs in soil samples around damaged capacitor. Because some samples show very high level of PCBs (even over 100 mg/kg) it was concluded to collected surface of the most polluted part of ground to investigate possibilities of remediation. The ability of some plant species to metabolise different organic contaminants of the environment is known, and in addition to attempts to improve the understanding of natural metabolic processes much effort is devoted to find conditions for exploitation of plants in biological remediation. The prerequisite for phytoremediation is the selection of proper species. Plants growing well at contaminated sites have to be tested if they are only resistant, or posses also ability to actively metabolise the contaminant in question. In such investigation one of the largest challenge is obtaining homogenous field for investigation, polluted with so absorbable pollutants as PCBs certainly are. It was reason to create experimental fields by using thoroughly mixed polluted soil in commercial large concrete mixer, capacity of 10 m3. At the begining of the creation the experimental fields, polluted area of the Station (concrete surface) was rinsed twice with water under high pressure (Kärcher miniwash). The contaminated soils were excavated until cca 25 cms , stones and plants were removed from the excavated soils which obviously has very different level of PCBs. The excavated soils were mixed and homogenized in a large volume concrete mixer about 3 hours. The homogenized soil was disposed and placed on surface nearby (cca. 10 m far from polluted part of Electricity Transformer Station) into 10 plots and prepared for seeding. Soil samples were taken to determinate PCBs content in 3 different plots. PCBs analysis of these three samples show very good homogenity at 10.33 % RSD. Seeding method: all plots were raked before setting seed , including control plots, stones were raked out. Plots were randomly selected and sowed. Three plots were sowed with Dactilis glomerata (L.) and other three with Alfa alfa (L.), - three control plots were not sowed.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

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