Abstract

JUAREZ-CISNEROS, Gladys  and  SANCHEZ-YANEZ, Juan Manuel. Biorestauration of soil polluted by waste motor oil by biostimulation with vermicompost and phytoremediation with Sorghum vulgare inoculated by Bacillus cereus and Rhizobium etli. J. Selva Andina Biosph. [online]. 2014, vol.2, n.1, pp.15-22. ISSN 2308-3867.

Soil pollution by waste motor oil (WMO) caused soil´s lost fertility. The aims of this research where a) bioremediation of soil polluted by 10000 ppm of WMO for biostimulation with vermicompost (VC) at 3 and 6 % (w/w) follow by b) phytoremediation (PR) of the same soil to eliminate remaining WMO with Sorghum vulgare inoculated with Bacillus cereus and/or Rhizobium etli or Promoting Growth Plant Bacteria (PGPB). At the first step of assay WMO concentration was measured before and after bioremediation. At the second step the same soil phytoremediation was applied for remaining WHO sowing S. vulgare inoculated with PGPB, then at flowering stage its biomass and WHO final concentration was determined. Results showed that soil impacted by WMO biostimulated with VC at 3% was eliminated 8630 ppm of WMO. At the second phase in the same soil PR applied for remaining WMO which was reduced until 210 ppm. Soil polluted by remaining WMO applied PR using S. vulgare plus R. etli WMO was decreased at 260 ppm. While S. vulgare´s biomass inoculated with PGPB was higher compared to S. vulgare grown in soil not polluted by WMO according by ANOVA - Tukey (p > 0.05). These results suggested that soil polluted by WMO could be recovering by applying integrated BR and PR better than just using one type.

Keywords : Aromatics; rizosphere; mineralization; rhizobacteria.

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