SciELO - Scientific Electronic Library Online

 
vol.32 issue2Volatile chemical constituents of the leaves and twigs from Zanthoxylum syncarpum Tull.Synthesis and evaluation of the phytotoxic activity of α-Santonin derivatives author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Química Nova

Print version ISSN 0100-4042

Abstract

CERQUEIRA, Vanessa Sacramento  and  COSTA, Jorge Alberto Vieira. Biodegradation of toluene and fish oil in impacted soil using chemical and biological surfactants. Quím. Nova [online]. 2009, vol.32, n.2, pp. 395-400. ISSN 0100-4042.  http://dx.doi.org/10.1590/S0100-40422009000200024.

The process of biodegradation of soils contaminated by animal (raw fish oil) and mineral (toluene) origin compounds was studied, verifying the influence of adding biosurfactants and chemical surfactants and nutrients in the media. The highest removal rate of fish oil was 59.47% obtained in the experiments containing biosurfactant and biostimulate in 90 days process. The highest removal rate of toluene was achieved in 14 days for experiments containing biosurfactant, chemical spreading and biosurfactant with biostimulation, showing great influence of evaporation on the process. The use of surfactants has shown to increase the contaminant bioavailability due to its higher degradation rate.

Keywords : biodegradation; biosurfactants; soil.

        · text in Portuguese     · pdf in Portuguese