Potential use of organomineral complex (OMC) at bioremediation of soil contaminated with organic (PCP) and inorganic (Pb,Cd) pollutants
2006
Dercová, K.,Slovak University of Technology, Bratislava (Slovak Republic) | Barančíková, G.,Soil Science and Conservation Research Institute, Bratislava (Slovak Republic) | Makovníková, J.,Soil Science and Conservation Research Institute, Bratislava (Slovak Republic) | Sejáková, Z.,Slovak University of Technology, Bratislava (Slovak Republic) | Skokanová, M.,Slovak University of Technology, Bratislava (Slovak Republic)
In the present document, we have determined the PCP biodegradation and possibility of decrease of the available forms of heavy metals (HM) in soils amended with an organomineral complex (OMC) prepared from humic acids (organic part) bound on zeolite (inorganic part). Both components of OMC have excellent sorption properties, are of natural origin and therefore suitable to be used in the environment. Biodegradation of PCP has been studied at three real completely characterized soil samples, Chernozem, Fluvisol, and Regosol, with and without the addition of OMC. The soils have been sterilized and bioaugmented with the bacterial isolate Comamonas testosteroni CCM 7530. The immobilization effect of OMC in relation to PCP depends on the concentration of humic acids (HAs), the PCP concentration, and the content of organic carbon in soil. OMC has appeared to be a good trap for PCP with potential applications in remediation technology because it has reduced the potential toxicity of PCP to microbial community by lowering its bioavailability and thus facilitated its biodegradation. Efficiency of OMC in the decrease of mobile forms of heavy metals has been also determined. Preliminary results show decrease of Cd and Pb mobile forms in Cambisol and Fluvisol at their treatment with OMC in comparison to soil alone.
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