Potential bacterial soil inoculant made up by Rhodococcus sp. and Pseudomonas sp. for remediation in situ of hydrocarbon - and heavy metal polluted soils

Tibor Benedek, István Máthé, Rozália Salamon, Szabolcs Rákos, Zoltán Pásztohy, Károly Márialigeti, Szabolcs Lányi

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Abstract

Since bioremediation is an environmentally friendly, cost effective approach to treat hydrocarbon-contaminated soils, in this study our aim was to develop a bacterial soil inoculant applicable in elimination of aliphatic, simpleand polyaromatic hydrocarbons from soils. To reach our goal two bacterial strains, Pseudomonas fluorescens BBN1 and Rhodococcus qingshengii BBG1, were selected to investigate their hydrocarbon-degrading abilities at DNA level and in microcosm experiments followed by GC-FID, as well as their ability to tolerate heavy-metal concentrations. Our results revealed that the proposed bacterial soil inoculant is suitable for elimination of aliphatic, monoaromatic and polycyclic aromatic hydrocarbons from soil samples, reaching degradation rates of 95% (n-dodecane), 66% (toluene), 70% (naphthalene) and 67% (phenanthrene) of initial pollutant concentrations within 42 days.

Original languageEnglish
Pages (from-to)199-211
Number of pages13
JournalStudia Universitatis Babes-Bolyai Chemia
Issue number3
Publication statusPublished - Dec 1 2012

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Keywords

  • AlkB
  • Bioaugmentation
  • C23O
  • CatA
  • GC-FID
  • In situ bioremediation
  • PAHs

ASJC Scopus subject areas

  • Chemistry(all)

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