The effect of soil type on the bioremediation of petroleum contaminated soils

Haghollahi, A.; Fazaelipoor, Mohammad Hassan; Schaffie, Mahin

doi:10.1016/j.jenvman.2016.05.038

Cited by 82 publications

(46 citation statements)

References 13 publications

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“…Bacteria able to use aromatic compounds as sources of carbon and energy could potentially eliminate harmful organic contaminants and help reclaim land. Stimulation of in-situ community growth by landfarming or other bioremediation techniques can be an effective measure to speed up the degradation of organic contaminants in soil [5, 7, 8]. Alternatively, inoculation of specifically enriched communities or purified strains to contaminated sites has been proposed to enhance biodegradation rates (i.e., bioaugmentation).…”

Section: Introductionmentioning

confidence: 99%

The Genome of the Toluene-Degrading Pseudomonas veronii Strain 1YdBTEX2 and Its Differential Gene Expression in Contaminated Sand

et al. 2016

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The natural restoration of soils polluted by aromatic hydrocarbons such as benzene, toluene, ethylbenzene and m- and p-xylene (BTEX) may be accelerated by inoculation of specific biodegraders (bioaugmentation). Bioaugmentation mainly involves introducing bacteria that deploy their metabolic properties and adaptation potential to survive and propagate in the contaminated environment by degrading the pollutant. In order to better understand the adaptive response of cells during a transition to contaminated material, we analyzed here the genome and short-term (1 h) changes in genome-wide gene expression of the BTEX-degrading bacterium Pseudomonas veronii 1YdBTEX2 in non-sterile soil and liquid medium, both in presence or absence of toluene. We obtained a gapless genome sequence of P. veronii 1YdBTEX2 covering three individual replicons with a total size of 8 Mb, two of which are largely unrelated to current known bacterial replicons. One-hour exposure to toluene, both in soil and liquid, triggered massive transcription (up to 208-fold induction) of multiple gene clusters, such as toluene degradation pathway(s), chemotaxis and toluene efflux pumps. This clearly underlines their key role in the adaptive response to toluene. In comparison to liquid medium, cells in soil drastically changed expression of genes involved in membrane functioning (e.g., lipid composition, lipid metabolism, cell fatty acid synthesis), osmotic stress response (e.g., polyamine or trehalose synthesis, uptake of potassium) and putrescine metabolism, highlighting the immediate response mechanisms of P. veronii 1YdBTEX2 for successful establishment in polluted soil.

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Section: Introductionmentioning

confidence: 99%

The Genome of the Toluene-Degrading Pseudomonas veronii Strain 1YdBTEX2 and Its Differential Gene Expression in Contaminated Sand

et al. 2016

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“…In soil, bacteria develop in association with the roots of plants and they can also be adsorbed by inorganic surfaces, such as clays, which in soil play a central role in influencing its structure, its porosity and its trading capacity [3]. There are factors that affect soil bioremediation, such as soil moisture, salinity, oxygen transfer, microbial population and nutrient availability in soil [4]. Microorganisms can attach to solid surfaces by their bioadhesive properties to form a biofilm.…”

Section: Introductionmentioning

confidence: 99%

“…So all the particles of the siphoned supernatant have a diameter d with the following conditions:(4) …”

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confidence: 99%

Preparation of a biosorbent complex (clay particles/Streptococcus thermophilus) to treat polluted water with methylene blue

2019

Adv. Environ. Biol

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“…Bioremediation of clays is challenging due to strong adsorption of organic pollutants to their surface [8,15]. Addition of nitrogen and phosphorous sources, low levels of sucrose, and low levels of a surfactant were considered for improvement of bioremediation.…”

Section: Introductionmentioning

confidence: 99%