Original scientific paper

CONTAMINATION OF SOILS OF ĐURĐEVAC SANDS BY HEAVY METALS

Andrija Špoljar orcid.org/0000-0001-5420-8163 ; Visoko gospodarsko učilište u Križevcima, Hrvatska
Lepomir Čoga orcid.org/0009-0008-8796-3315 ; Agronomski fakultet Sveučilišta u Zagrebu, Zagreb, Hrvatska
Vlado Kušec ; Visoko gospodarsko učilište u Križevcima, Hrvatska
Dragutin Kamenjak ; Visoko gospodarsko učilište u Križevcima, Hrvatska
Ivo Pavlović ; Agronomski fakultet Sveučilišta u Zagrebu, Zagreb, Hrvatska
Ivka Kvaternjak orcid.org/0000-0001-5994-7387 ; Visoko gospodarsko učilište u Križevcima, Hrvatska

Abstract

Pedological researches were conducted in geobotanical reserve Đurđevac sands during 2006. and 2007. in order to determine the total heavy metals content the (Zn, Cu, Cd, Pb, Ni and Cr). Correlation and regression relations were also worked out between total researched heavy metals, humus content, as well as soil reaction. The geobotanical reserve occupies the area of 19.5 ha. At the end of 19th and the beginning of 20th century eolic shifting sands of the Podravina region from Đurđevac to Virovitica were forested, resulting in disruption of biological and landscape diversity of the area. In order to restore the nature reserve, unwanted vegetation was eliminated in 6 ha, or humus accumulative layer of the soil was removed, resulting in partial restoration of Đurđevac shifting sands. In the broader area of the geobotanical reserve there are several gas and oil wells,whose drilling mud excavations contain different toxic substances hazardous for environment. Contamination of the nature reserve with above mentioned heavy metals was researched and comparison of contamination was made for the devastated and restored area. According to the level of contamination with by these heavy metals in individual soil samples from the whole area, encreased contamination with Copper, Cadmium and Nickel, and a high contamination with Chromium, was determined. The highest contamination of soils of the nature reserve, determined from individual soil samples of surface layer, was with Chromium, and the least with Lead. In the restored area bigger Copper and Lead total content of was determined on the average below of 30 cm soil depth and smaller total of Zinc, Cadmium, Nickel and Chromium content. The strongest positive correlation relation was determined among reaction of soil measured in water and total content of Copper, and negative one in relation to total Nickel content. The strongest positive correlation was also determined between the amount of humus and total Cadmium content, and negative one the amount of humus and total Nickel content. The paper proposes directives for the future management of the nature reserve.

Keywords

Đurđevac sands; soil contamination; heavy metals

Hrčak ID:

26599

URI

https://hrcak.srce.hr/26599

Publication date:

15.3.2008.

Article data in other languages: croatian

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