The Use of Adsorbent Materials of Improving the Characteristics of Polluted Soils, Part 1 Phytoremediation of Soils Polluted with Oil Products, Cultivated with Technical Plants
Keywords:
fly ash, phytoremediation process, sewage sluge, total petroleum hydrocarbonAbstract
In this study are presented in pot experimental variants regarding alternatives to improve the characteristics of soils polluted with 74.12 ± 3.50 g kg-1 D.M. total petroleum hydrocarbon (TPH) in order to apply the phytoremediation process using technical plants from the common flax (Linum usitatissimum). The harmful effects of TPH polluted soils to plants was reduced by using fly ash from thermal plant as temporary adsorbent of non-polar pollutants, petroleum products. The increase of water retention capacity of the soil was achieved by treatments with indigenous volcanic tuff. The lack of nutrients, based on N and P in soils contaminated with TPH rich in C compounds are completed using sewage sludge anaerobically stabilized. The use of appropriate amounts of fly ash and fertilizer agents in the presence of volcanic tuff caused the formation of strong networks of roots and rich harvests of plants, stems and seeds from the treated soil. The TPH reduction efficiency of TPH polluted soils treated with fly ash (TPH soil: fly ash ratio 12:1 wt./wt.) and anaerobically stabilized sewage sludge respectively indigenous volcanic tuff during one vegetative cycle of crops was in the range of 56.2-63.25%.
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