Petroleum contamination evaluation and bacterial community distribution in a historic oilfield located in loess plateau in China

Gao, Sha; Ji, Liang; Teng, Tingting; Zhang, Man

doi:10.1016/j.apsoil.2018.12.012

Cited by 72 publications

(19 citation statements)

References 106 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In both FN1 and FN4 microcosms, there were considerable decreases in total hydrocarbon content during the 42day treatability period, indicating that there were autochthonous populations with hydrocarbon metabolism capability in the system. However, the fact that over 70% reduction in aliphatic and aromatic hydrocarbons was observed in FN1 where there was only addition of water and tilling highlights the important role of water activity as a limiting factor in the biodegradation of hydrocarbon pollutants in soil, especially in environments such as arid soil where moisture content is low or where water activity is low [38]. This trend has also been observed in our previous study [39].…”

Section: Discussionsupporting

confidence: 84%

“…It is equally noteworthy that many Actinobacteria generally are oligotrophs and slow growers which can easily be overtaken by copiotrophs and are favoured in an environment with pH 6 and 9 [53,54]. Several authors have established that physicochemical parameters play a cardinal role in determining the community composition of hydrocarbon impacted systems and even a slight alteration in certain parameters could significantly skew the distribution in favour of a particular group [38,55].…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Remarkable shift in structural and functional properties of an animal charcoal-polluted soil accentuated by inorganic nutrient amendment

Salam¹,

Obayori

2020

Journal of Genetic Engineering and Biotechnology

View full text Add to dashboard Cite

Background Soils polluted with animal charcoal from skin and hide cottage industries harbour extremely toxic and carcinogenic hydrocarbon pollutants and thus require a bio-based eco-friendly strategy for their depuration. The effects of carbon-free mineral medium (CFMM) amendment on hydrocarbon degradation and microbial community structure and function in an animal charcoal-polluted soil was monitored for 6 weeks in field moist microcosms consisting of CFMM-treated soil (FN4) and an untreated control (FN1). Hydrocarbon degradation was monitored using gas chromatography-flame ionization detector (GC-FID), and changes in microbial community structure were monitored using Kraken, while functional annotation of putative open reading frames (ORFs) was done using KEGG KofamKOALA and NCBI’s conserved domain database (CDD). Results Gas chromatographic analysis of hydrocarbon fractions revealed the removal of 84.02% and 82.38% aliphatic and 70.09% and 70.14% aromatic fractions in FN4 and FN1 microcosms in 42 days. Shotgun metagenomic analysis of the two metagenomes revealed a remarkable shift in the microbial community structure. In the FN4 metagenome, 92.97% of the population belong to the phylum Firmicutes and its dominant representative genera Anoxybacillus (64.58%), Bacillus (21.47%) and Solibacillus (2.39%). In untreated FN1 metagenome, the phyla Proteobacteria (56.12%), Actinobacteria (23.79%) and Firmicutes (11.20%), and the genera Xanthobacter (9.73%), Rhizobium (7.49%) and Corynebacterium (7.35%), were preponderant. Functional annotation of putative ORFs from the two metagenomes revealed the detection of degradation genes for aromatic hydrocarbons, benzoate, xylene, chlorocyclohexane/chlorobenzene, toluene and several others in FN1 metagenome. In the FN4 metagenome, only seven hydrocarbon degradation genes were detected. Conclusion This study revealed that though CFMM amendment slightly increases the rate of hydrocarbon degradation, it negatively impacts the structural and functional properties of the animal charcoal-polluted soil. It also revealed that intrinsic bioremediation of the polluted soil could be enhanced via addition of water and aeration.

show abstract

Section: Discussionsupporting

confidence: 84%

Section: Discussionmentioning

confidence: 99%

Remarkable shift in structural and functional properties of an animal charcoal-polluted soil accentuated by inorganic nutrient amendment

Salam¹,

Obayori

2020

Journal of Genetic Engineering and Biotechnology

View full text Add to dashboard Cite

show abstract

“…In both FN1 and FN4 microcosms, there were considerable decreases in total hydrocarbon content during 42 days treatability period, indicating that there were autochthonous populations with hydrocarbon metabolism capability in the system. However, the fact that over 70 percent reduction in aliphatic and aromatic hydrocarbons was observed in FN1 where there was only addition of water and tilling highlights the important role of water activity as a limiting factor in the biodegradation of hydrocarbon pollutants in soil, especially in environment such as arid soil where moisture content is low or where water activity is low (Gao et al 2019). This trend has also been observed in our previous study (Salam and Idris, 2019).…”

Section: Discussionsupporting

confidence: 83%

Remarkable Shift In Structural And Functional Properties of An Animal Charcoal Polluted Soil Accentuated By Inorganic Nutrients Amendment

Salam

Obayori

2020

Preprint

View full text Add to dashboard Cite

Abstract The effects of carbon-free mineral medium (CFMM) amendment on hydrocarbon degradation and microbial community structure and function in an animal charcoal polluted soil was monitored for six weeks in field moist microcosms consisting of CFMM treated soil (FN4) and an untreated control (FN1). Gas chromatographic analysis of hydrocarbon fractions revealed the removal 84.02% and 82.38% and 70.09% and 70.14% aliphatic and aromatic fractions in FN4 and FN1 microcosms in 42 days. Shotgun metagenomic analysis of the two metagenomes revealed a remarkable shift in the microbial community structure of FN4 metagenome with 92.97% of the population belonging to the phylum Firmicutes and its dominant representative genera Anoxybacillus (64.58%), Bacillus (21.47%) and Solibacillus (2.39%). In untreated FN1 metagenome, the phyla Proteobacteria (56.12%), Actinobacteria (23.79%), Firmicutes (11.20%); and the genera Xanthobacter (9.73%), Rhizobium (7.49%) and Corynebacterium (7.35%) were preponderant. Functional annotation of putative ORFs from the two metagenomes revealed the detection of degradation genes for benzoate (pcaD, mhpF, aliB, benD-xylL, benC-xylZ, badH, had, dmpD, ligC, CMLE, pcaL, acd), xylene (mhpF, benD-xylL, benC-xylZ, dmpD, cymB, cmtB), chlorocyclohexane/chlorobenzene (dehH, dhaA, linC, linX, pcpC), toluene (bbsG, bbsC, bbsD, tsaC1), and several others in FN1 metagenome. In FN4 metagenome, only seven hydrocarbon degradation genes namely dmpH, mhpD, bphH, nemA and three others were detected. This study has revealed that CFMM amendment negatively impacts the structural and functional properties of the animal charcoal polluted soil. It also revealed that intrinsic bioremediation of the polluted soil could be enhanced via addition of water and aeration.

show abstract

“…The theoretical TPHs content for diesel‐contaminated soil was nearly 29.00 g kg −1 . This result is higher than what is reported in previous works, e.g., 1.60–3.50 g kg −1 30, 6.10 g kg −1 31, 7.02 g kg −1 32, 10.00 g kg −1 33, 19.85 g kg −1 34, so this sample can be considered as extremely contaminated.…”

Section: Resultscontrasting

confidence: 68%

Advanced Oxidation of Polycyclic Aromatic Hydrocarbons in Soils Contaminated with Diesel Oil at Pilot‐Scale

et al. 2021

View full text Add to dashboard Cite

Diesel‐contaminated soil was treated with Fenton's oxidant, from hydrogen peroxide. Soil samples were collected during the earthmoving of RNEST Oil Refinery (Petrobras). A factorial design 33 evidenced that the concentration of iron ions [Fe2+] was the variable with the most statistically significant effect in all experiments. The oxidation efficiency was found to be 57 % of total organic carbon (TOC) and 78 % of polycyclic aromatic hydrocarbon (PAH) removal. Moreover, the sum of low‐molecular‐weight PAHs on treated soil and the sum of high‐molecular‐weight PAHs was determined. Soil remediation in a pilot‐scale reactor led to a reduction of nearly 80 % in total PAHs. Toxicity assessment with Californian red earthworms as bioindicator evidenced the mineralization of PAHs.

show abstract

Petroleum contamination evaluation and bacterial community distribution in a historic oilfield located in loess plateau in China

Cited by 72 publications

References 106 publications

Remarkable shift in structural and functional properties of an animal charcoal-polluted soil accentuated by inorganic nutrient amendment

Remarkable shift in structural and functional properties of an animal charcoal-polluted soil accentuated by inorganic nutrient amendment

Remarkable Shift In Structural And Functional Properties of An Animal Charcoal Polluted Soil Accentuated By Inorganic Nutrients Amendment

Advanced Oxidation of Polycyclic Aromatic Hydrocarbons in Soils Contaminated with Diesel Oil at Pilot‐Scale

Contact Info

Product

Resources

About