The efficiency of rhizosphere bioremediation with azospirillum sp. and pseudomonas stutzeri in soils freshly contaminated with PAHs and diesel

• Autorzy: Galazka A. , Krol M. , Perzynski A.
• Języki publikacji: EN

Abstrakty

EN

In this study the effects of meadow fescue (Festuca pratensis) inoculated (I+) and non-inoculated (I-) by diazothrophic species of bacteria (Azospirillum spp. and Pseudomonas stutzeri) on the degradation of polycyclic aromatic hydrocarbons in soils freshly contaminated with a mixture of PAHs and diesel fuel was investigated. Plants were grown in three different soils (chernozem, rendzina, lessives) for 4 weeks and unplanted soils considered as control. At the end of the experiment, physical properties of soils, dry masses of plants, and Σ 15PAH contents were measured in the soils. The results demonstrated that I (+) plants contained more root and shoot biomass than I (-) plants. Planting stimulated the bioremediation process in contaminated soils. The differences in concentration between the inoculated or non-inoculated soils indicate that the presence of plant roots, in addition to the passage of time, contributes, to reduction in the bioavailability of a mixture of PAHs and diesel fuel. The choice of soils, contamination, and inoculation has a significant effect of PAH degradation (mixture 1: in chernozem 24.8-59.7%, in rendzina 15.4-41.4%, in lessives 48.4-71,4%). It was revealed that they were more degraded in the rhizosphere of (I+) plants compared to I (-) ones. Obtained results suggests that inoculation of plants with Azospirillum spp. and P. stutzeri looks promising as a low-cost treatment method for PAH-contaminated soil.

• Wydawca: -
• Czasopismo: Polish Journal of Environmental Studies
• Rocznik: 2012
• Tom: 21
• Numer: 2
• Opis fizyczny: p.345-353,fig.,ref.

Twórcy

autor

Galazka A.

• Department of Agricultural Microbiology, Institute of Soil Science and Plant Cultivation – State Research Institute, Czartoryskich 8, 24-100 Puławy, Poland

autor

Krol M.

• Department of Agricultural Microbiology, Institute of Soil Science and Plant Cultivation – State Research Institute, Czartoryskich 8, 24-100 Puławy, Poland

autor

Perzynski A.

• Department of Agricultural Microbiology, Institute of Soil Science and Plant Cultivation – State Research Institute, Czartoryskich 8, 24-100 Puławy, Poland

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