Enrichment of the soil microbial community in the bioremediation of a petroleum-contaminated soil amended with rice straw or sawdust

Huang, Yongjie; Pan, Huan; Wang, Qingling; Ge, Yufeng; Liu, Wuxing; Christie, Peter

doi:10.1016/j.chemosphere.2019.02.148

Cited by 86 publications

(43 citation statements)

References 47 publications

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“…The total PAHs concentration decreased from 2275 to 1873 μg•kg -1 in the CK treatment, suggesting the major contribution of degradation to PAHs by the indigenous microbes and in agreement with previous studies (Huang et al 2019;Li et al 2019c). There was no signi cant difference in the nal concentration of PAHs between the CK and N100 treatment which was in line with previous studies.…”

Section: Resultssupporting

confidence: 93%

“…Organic substrates could improve soil aeration and nutrient levels, as well as provide shelter for soil microorganisms, thus improving the activities of microorganism and enhancing the degradation of organic pollutants (Barathi and Vasudevan 2003). Similarly, it has been reported that returning organic substrates (sawdust, mushroom cultivation substrate, pea straw and wheat stalk) to eld could stimulate the biodegradation process of PAHscontaminated soil (Huang et al 2019;Li et al 2012;Han et al 2017;Koshlaf et al 2019). Compared to other three treatments, YN100 treatment signi cantly decreased (P < 0.05) the nal PAHs concentration in soil.…”

Section: Resultsmentioning

confidence: 95%

“…Compared with CK, Y and YN100 treatment signi cantly (P < 0.05) enhanced HMW PAHs degradation in soil by 11.98% and 20.95, respectively. Similarly, Huang et al (2019) concluded that adding sawdust to soils results in the higher degradation of 5-6 rings PAHs in soils than 2-4 rings PAHs. Cellulose enzymes and ligninolytic enzymes, such as laccase, manganese peroxidase and lignin peroxidase formed during the decomposition of straw have exceptional capacities for bioconversion of PAHs and may contribute to soil HMW PAHs dissipation through co-metabolic mechanisms (Li et al 2012).…”

Section: Resultsmentioning

confidence: 99%

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Enhanced rhizodegradation of polycyclic aromatic hydrocarbons in corn straw-amended soil related to changing of bacterial community and functional gene expression

Bao

Wang

Zhang

et al. 2021

Preprint

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Root exudates can stimulate microbial degradation in rhizosphere, but it remains unclear whether the rhizodegradation of polycyclic aromatic hydrocarbons (PAHs) occurs in corn straw-amended soil. Hence, in the present study, either citric acid, a common low molecular weight organic acid in the root exudates, or corn straw was added into aged PAHs-contaminated soil to investigate their effectiveness in the biodegradation of PAHs. The present study showed that either corn straw (Y) or combined application of corn straw and citric acid (YN100) significantly (P < 0.05) enhanced the degradation of total PAHs in soil after 28 days incubation, which increased by 8.43% and 18.62% compared with control (CK), respectively. High-throughput sequencing suggested that both Y and YN100 treatments led to a shift in bacterial community in soil and increased the abundance of PAHs degraders. Interestingly, the copies of PAHs ring-hydroxylating-dioxygenase (PAH-RHD) Gram-negative bacteria (GN) genes under YN100 treatment was significantly (P < 0.05) higher than those under Y treatment in the soil. Network analysis showed that the potential hosts of PAH-RHDα genes were Lysobacter, Rhizobium, Bacillus, Devosia, Ohtaekwangia, Ramlibacter, Massilia, Steroidobacter, Phenylobacterium and Microvirga. Bacillus, Lysobacter, Rhizobium and Ohtaekwangia and all ten genera obviously increased under Y and YN100 treatments. These results indicate that combined application of corn straw and citric acid increased the PAH-degrading bacteria and PAH-RHDα genes, thus improving the biodegradability of PAHs in the soil. As these results verified, a combined corn straw-rhizosphere approach should be a feasible remediation strategy for PAHs-contaminated soil.

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Section: Resultssupporting

confidence: 93%

Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 99%

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Enhanced rhizodegradation of polycyclic aromatic hydrocarbons in corn straw-amended soil related to changing of bacterial community and functional gene expression

Bao

Wang

Zhang

et al. 2021

Preprint

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“…These bacteria are also able to degrade polycyclic aromatic hydrocarbons (PAHs) (Yang et al ., 2014 ). Phenylobacterium has now been used in the bioremediation of a petroleum‐contaminated soil to degrade PAHs and their analogues (Huang et al ., 2019). However, the role of Phenylobacterium in aquatic ecosystems remains unexplored.…”

Section: Discussionmentioning

confidence: 99%

The involvement of α‐proteobacteria Phenylobacterium in maintaining the dominance of toxic Microcystis blooms in Lake Taihu, China

Zuo

Shen

et al. 2020

Environmental Microbiology

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Summary Lake Taihu in China has suffered serious harmful cyanobacterial blooms for decades. The algal blooms threaten the ecological sustainability, drinking water safety, and human health. Although the roles of abiotic factors (such as water temperature and nutrient loading) in promoting Microcystis blooms have been well studied, the importance of biotic factors (e.g. bacterial community) in promoting and meditating Microcystis blooms remains unclear. In this study, we investigated the ecological dynamics of bacterial community, the ratio of toxic Microcystis, as well as microcystin in Lake Taihu. High‐throughput 16S rRNA sequencing and principal component analysis (PCA) revealed that the bacteria community compositions (BCCs) clustered into three groups, the partitioning of which corresponded to that of groups according to the toxic profiles (the ratio of toxic Microcystis to total Microcystis, and the microcystin concentrations) of the samples. Further Spearman's correlation network showed that the α‐proteobacteria Phenylobacterium strongly positively correlated with the toxic profiles. Subsequent laboratory chemostats experiments demonstrated that three Phenylobacterium strains promoted the dominance of the toxic Microcystis aeruginosa PCC7806 when co‐culturing with the non‐toxic PCC7806 mcyB− mutant. Taken together, our data suggested that the α‐proteobacteria Phenylobacterium may play a vital role in the maintenance of toxic Microcystis dominance in Lake Taihu.

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“…The high potential of environmental risks from crude oil spills encouraged us to search for local bacterial isolates inhabiting the oil-contaminated soils and able to utilize the contaminant as an energy source. Crude oil hydrocarbons (n-alkanes toluene and PAHs) are prevalent organic contaminants (Lee et al, 2018;Huang et al, 2019). They are usually produced as results of the pyrolysis of organic compounds or incomplete combustion.…”

Section: Introductionmentioning

confidence: 99%

Effective Removal of Alkanes and Polycyclic Aromatic Hydrocarbons by Bacteria from Soil Chronically Exposed to Crude Petroleum Oil

Afkar

Hafez

Ibrahim

et al. 2021

Preprint

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In this study, two bacterial strains isolated from an oil-contaminated soil, designated as AramcoS2 and AramcoS4 were able to degrade crude oil, long-chain n-alkanes of C10 to C20; (n-decane, n-undecane, n-dodecane, n-tridecane, n-tetradecane, n-pentadecane, n-hexadecane, n-heptadecane, n-octadecane n-nonadecane, and n-eicosane) and polycyclic aromatic hydrocarbons (PAHs) including biphenyl, naphthalene, and anthracene. Gas chromatography-mass spectrometry (GC-MS) technique was conducted to analyze and identify the crude oil residues after biodegradation. AramcoS2 and AramcoS4 were able to reduce the concentration of long-chain n-alkanes of C10-C20 efficiently on average by 77% of the original concentration. Both isolates could also degrade PAHs on average by 67% of the original concentration within 7 and 14 days of incubation at 30ºC, pH=6.8±0.2. The 16S rRNA gene sequences of AramcoS2 and S4 classified these isolates as Actinobacteria; well-known alkanes and PAHs degraders. The nucleotide sequences of AramcoS2 and AramcoS4 were submitted to the GenBank database under the accession numbers MN142506 and MN142551, respectively. Both isolates can be used to restore the environments contaminated with crude oil components. They should be of great practical significance both in bioremediation of soil contaminated with crude oil and bio-treatment of oil spills on surface water.

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Enrichment of the soil microbial community in the bioremediation of a petroleum-contaminated soil amended with rice straw or sawdust

Cited by 86 publications

References 47 publications

Enhanced rhizodegradation of polycyclic aromatic hydrocarbons in corn straw-amended soil related to changing of bacterial community and functional gene expression

Enhanced rhizodegradation of polycyclic aromatic hydrocarbons in corn straw-amended soil related to changing of bacterial community and functional gene expression

The involvement of α‐proteobacteria Phenylobacterium in maintaining the dominance of toxic Microcystis blooms in Lake Taihu, China

Effective Removal of Alkanes and Polycyclic Aromatic Hydrocarbons by Bacteria from Soil Chronically Exposed to Crude Petroleum Oil

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