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Author(s): António Alves Soares
Maria Teresa Pinho
José Tomás Albergaria
Valentina Domingues
Maria da Conceição Alvim Ferraz
Cristina Delerue Matos
Title: Biocomplementation of SVE to achieve clean-up goals in soils contaminated with toluene and xylene
Issue Date: 2013
Abstract: t Soil vapor extraction (SVE) and bioremediation (BR) are two of the most common soil remediationtechnologies. Their application is widespread; however,both present limitations, namely related to the efficiencies of SVE on organic soils and to the remediationtimes of some BR processes. This work aimed to studythe combination of these two technologies in order toverify the achievement of the legal clean-up goals in soilremediation projects involving seven different simulatedsoils separately contaminated with toluene and xylene.The remediations consisted of the application of SVEfollowed by biostimulation. The results show that thecombination of these two technologies is effective andmanages to achieve the clean-up goals imposed by theSpanish Legislation. Under the experimental conditionsused in this work, SVE is sufficient for the remediationof soils, contaminated separately with toluene andxylene, with organic matter contents (OMC) below4 %. In soils with higher OMC, the use of BR, as acomplementary technology, and when the concentrationof contaminant in the gas phase of the soil reachesvalues near 1 mg/L, allows the achievement of theclean-up goals. The OMC was a key parameter becauseit hindered SVE due to adsorption phenomena but enhanced the BR process because it acted as a microorganism and nutrient source.
Related Information: info:eu-repo/grantAgreement/FCT - Fundação para a Ciência e Tecnologia/Projetos Estratégicos/PEst-C/EQB/UI0511/2013/PROJECTO ESTRATÉGICO - UI 511 - 2013-2014/UI0511
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

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