Phytoremediation of polluted soil at two sites in the district of Klaipeda (Lithuania)
DOI:
https://doi.org/10.15626/Eco-Tech.2003.008Abstract
The vegetation cover of two sites contaminated with heavy fractions oil products:
Klaipeda State Oil Terminal (KSOT) of 130,000 sq. m area, and Pauoscio Railway
Station (PRS) of 60,000 sq. m area-has been investigated.
It has been established, that phytotoxical effect begins with heavy oil concentrations
reaching I 000 g/m2 or 5 000 mg per l kg of dry soil. Such heavy oil contains
p-edominantly tar (by 55 percent) and light hydrocarbons (below C28) composed of the
following factions (in percentage): paraffin-naphtene hydrocarbons - 15, olefins and
cyclodiolefines -5, alkilaromatic - l, alkidiaromatic -4, polyaromatic -20.
Also, plant species and communities have been identified. The KSOT site has been found
to nurture 271 species of vascular plants. The most part of this flora consists of referral
plants aD'.I those specific for littoral sands. The most polluted area has been found to
nurture 38 plant species.
The most resistant to the fuel oil pollution are plants having long rootstocks and long
taproots: Calamagrostis epigejos, Carex hirta, Elytrigia repens, Leymus arenarius, Poa
compressa, Artemisia campestris, Cirsium arvense, Convolvulus arvensis, Tanacetum
valgare, Tussilago farfara. Some of them can be used in ex-situ remediation of the oilpolluted soil at biodegradation ranges. They can also be used as model plants in
experimental selection of cultivated plants for bioremediation purposes.
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