Degradation of fluorene and phenanthrene in PAHs-contaminated soil using Pseudomonas and Bacillus strains isolated from oil spill sites

Rabodonirina, Suzanah; Rasolomampianina, R.; Krier, François; Drider, Djamel; Merhaby, Dima; Net, Sopheak; Ouddane, Baghdad

doi:10.1016/j.jenvman.2018.11.005

Cited by 129 publications

(29 citation statements)

References 61 publications

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“…This was consistent with the results in Table 3 that demonstrates that the solubility of individual PAHs in seawater would decrease with the increasing number of aromatic rings [42], whereas the logK ow would increase. The findings of the current study demonstrated that the LMW PAHs with logK ow values between 3.30 and 4.54 would preferentially partition to the water column rather than associate with sediment particles, which was consistent with the results from previous studies [42,58,59]. Moreover, the application of dispersant could enhance the OSE of HMW PAHs in the sunken oils, especially 4-ring PAHs, which might subsequently cause more severe consequences for marine benthonic organisms [13,18,60].…”

Section: Discussionsupporting

confidence: 91%

Distribution of Polycyclic Aromatic Hydrocarbons in Sunken Oils in the Presence of Chemical Dispersant and Sediment

Gao

Xiong

et al. 2019

JMSE

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The formation of sunken oils is mainly dominated by the interaction between spilled oils and sediments. Due to their patchiness and invisibility, cleaning operations become difficult. As a result, sunken oils may cause long-term and significant damage to marine benthonic organisms. In the present study, a bench experiment was designed and conducted to investigate the quantitative distribution of polycyclic aromatic hydrocarbons (PAHs) in sunken oils in the presence of chemical dispersant and sediment. The oil sinking efficiency (OSE) of 16 priority total PAHs in the sediment phase was analyzed with different dosages of dispersant. The results showed that the synergistic effect of chemical dispersant and sediment promoted the formation of sunken oils, and the content of PAHs partitioned in the sunken oils increased with the increase of dispersant-to-oil ratios (DORs). Furthermore, with the addition of chemical dispersant, due to the solubility and hydrophobicity of individual PAHs, the high molecular weight (HMW) PAHs with 4–6 rings tended to partition to sediment compared with low molecular weight (LMW) PAHs with 2–3 rings. The synergistic effect of chemical dispersant and sediment could enhance the OSE of HMW PAHs in sunken oils, which might subsequently cause certain risks for marine benthonic organisms.

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Section: Discussionsupporting

confidence: 91%

Distribution of Polycyclic Aromatic Hydrocarbons in Sunken Oils in the Presence of Chemical Dispersant and Sediment

Gao

Xiong

et al. 2019

JMSE

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“…Subsequently, a residual contaminants fraction, usually associated with the finer grain-sizes (note the remarkable presence of clays in our case), typically remains in the soil [49]. Our bioslurry approach, together with bioaugmentation processes using well-known PAH-degraders capable of producing biosurfactants such as P. stutzeri [50,51] and R. erythropolis [52,53], overcame these difficulties. On the whole, the three experiments showed similar results after 15 days, although Treatment A (only autochthonous microorganisms) showed a slightly inferior performance.…”

Section: Chemical Analysismentioning

confidence: 98%

Bioaugmentation Treatment of a PAH-Polluted Soil in a Slurry Bioreactor

et al. 2020

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A bioslurry reactor was designed and used to treat loamy clay soil polluted with polycyclic aromatic hydrocarbons (PAHs). To this end, biostimulation alone, or combined with bioaugmentation with two bacterial strains (Rhodocccus erythropolis and Pseudomonas stuzeri) previously isolated from the polluted site, was applied. The PAH concentrations decreased notably after 15 days in all of the treatments. The concentrations of the two- and three-ring compounds fell by >80%, and, remarkably, the four- to six-ring PAHs also showed a marked decrease (>70%). These results thus indicate the capacity of bioslurry treatments to improve, notably, the degradation yields obtained in a previous real-scale remediation carried out using biopiles. In this sense, the remarkable results for recalcitrant PAHs can be attributed to the increase pollutants’ bioavailability achieves in the slurry bioreactors. Regarding bioaugmentation, although treatment with R. erythropolis led to a somewhat greater reduction of lighter PAHs at 15 days, the most time-effective treatment was achieved using P. stutzeri, which led to an 84% depletion of total PAHs in only three days. The effects of microbial degradation of other organic compounds were also monitored by means of combined qualitative and quantitative gas chromatography mass spectrometry (GC–MS) tools, as was the evolution of microbial populations, which was analyzed by culture and molecular fingerprinting experiments. On the basis of our findings, bioslurry technology emerges as a rapid and operative option for the remediation of polluted sites, especially for fine soil fractions with a high load of recalcitrant pollutants.

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“…Among 3391 shared OTUs and at the level of phylum, Proteobacteria predominated (29.05% abundance) over Chloroflexi (13.89%), Acidobacteria (6.4%), and Actinobacteria (5.96%), and the abundance of Bacteroidetes (4.66%), Planctomycetes (4.48%) and Firmicutes (4.10%) were also increased. The abundance of PAH degrading Thauera and Diaphorobacter (Betaproteobacteria), SEEP-SRB1, Tumebacillus (Firmicutes), Lysobacter, Acinetobacter and Pseudomonas (Gammaproteobacteria), and Desulfobulbus (Deltaproteobacteria) was increased on anodes, some of which are also involved in electron transfer (Kleindienst et al, 2012;Zhao et al, 2018;Rabodonirina et al, 2019).…”

Section: Microbial Diversity In Mfc Anode Microbiota Involved In Pah mentioning

confidence: 99%

“…In a 60 mL dual-chamber MFC with proton exchange membrane, Pseudomonas was dominant in both planktonic and biofilm parts (Sharma et al, 2020). PHE was quickly adsorbed and assimilated by surfactant producing Pseudomonas (Rabodonirina et al, 2019). In a bacterial consortium, Pseudomonas and Rhodococcus (Actinobacteria) synergistically degrade PAHs partially due to their bioemulsifying properties (Isaac et al, 2015).…”

Section: Microbial Diversity In Mfc Anode Microbiota Involved In Pah mentioning

confidence: 99%

The Utility of Electrochemical Systems in Microbial Degradation of Polycyclic Aromatic Hydrocarbons: Discourse, Diversity and Design

Hao

Li²,

Xiao

et al. 2020

Front. Microbiol.

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Degradation of fluorene and phenanthrene in PAHs-contaminated soil using Pseudomonas and Bacillus strains isolated from oil spill sites

Cited by 129 publications

References 61 publications

Distribution of Polycyclic Aromatic Hydrocarbons in Sunken Oils in the Presence of Chemical Dispersant and Sediment

Distribution of Polycyclic Aromatic Hydrocarbons in Sunken Oils in the Presence of Chemical Dispersant and Sediment

Bioaugmentation Treatment of a PAH-Polluted Soil in a Slurry Bioreactor

The Utility of Electrochemical Systems in Microbial Degradation of Polycyclic Aromatic Hydrocarbons: Discourse, Diversity and Design

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