Abstract

SAUCEDO-MARTINEZ, Blanca Celeste; MARQUEZ-BENAVIDES, Liliana  and  SANCHEZ-YANEZ, Juan Manuel. Biostimulation of a soil impacted by waste car oil and phytoremediation with Zea Mays. Rev. P+L [online]. 2016, vol.11, n.2, pp.31-40. ISSN 1909-0455.  https://doi.org/10.22507/pml.v11n2a3.

ABSTRACT Introduction. A soil contaminated with 45000 ppm of waste car oil (WCO) inhibits the mineralization of organic matter and the soil's fertility. An alternative solution is biostimulating it with an animal and/or vegetal fertilizer, then perform a phytoremediation with a grass that tolerates hydrocarbons, an inoculation with Burkholderia cepacia and Rhizobium etli and later decrease the WCO to a value below the maximum one accepted by NOM-138-SEMARNAT/SSAI-2012 (NOM-138), which is 4,400 ppm. Objectives i) The biostimulation of the soil impacted by 45.000 ppm of WCO with vermicompost and bovine compost at 3%; ii) phytoremediation by means of Zea mays inoculated with B.cepacia and R. etli to reduce the oil up to a value below that accepted by NOM-138. Materials and methods. The soil contaminated with 45.000 ppm of WCO was biostimulated by means of vermicompost and bovine compost at 3%. After the bioremediation and the phytostimulation of that soil, the initial and the final concentrations were determined by means of Soxhlet. In the phytoremediation, the phenology of Z. mays was included: Plant's height and root's length. Also biomass: fresh aerial and radical weight, aerial and radical dry weight of Z. mays; The experimental data were analyzed by means of ANOVA Tukey. Results. The bioremediation of a soil contaminated with 45.000 ppm of WCO by means of vermicompost and bovine compost, reduced that contamination to 21.000 ppm; Then, the phytoremediation by means of mays and B. cepacia reduced it to 1,822 ppm, a value below the one permitted by NOM-138. Conclusion. The integration of bioremediation of a soil contaminated with 45,000 ppm ofWCO by means of bovine compost and vermicompost, followed by phytoremediation by means of por Z. mays and B. cepacia, was more effective for the remediation than the individual application in the endeavor of achieving a WCO's final value below the one accepted by NOM-138.

Keywords : animal/vegetal compost; soil; waste car oil; Burkholderia cepacia; Zea mays.