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Spatial Variability of PAHs and Microbial Community Structure in Surrounding Surficial Soil of Coal-Fired Power Plants in Xuzhou, China

View Article: PubMed Central - PubMed

ABSTRACT

This work investigated the spatial profile and source analysis of polycyclic aromatic hydrocarbons (PAHs) in soil that surrounds coal-fired power plants in Xuzhou, China. High-throughput sequencing was employed to investigate the composition and structure of soil bacterial communities. The total concentration of 15 PAHs in the surface soils ranged from 164.87 to 3494.81 μg/kg dry weight. The spatial profile of PAHs was site-specific with a concentration of 1400.09–3494.81 μg/kg in Yaozhuang. Based on the qualitative and principal component analysis results, coal burning and vehicle emission were found to be the main sources of PAHs in the surface soils. The phylogenetic analysis revealed differences in bacterial community compositions among different sampling sites. Proteobacteria was the most abundant phylum, while Acidobacteria was the second most abundant. The orders of Campylobacterales, Desulfobacterales and Hydrogenophilales had the most significant differences in relative abundance among the sampling sites. The redundancy analysis revealed that the differences in bacterial communities could be explained by the organic matter content. They could also be explicated by the acenaphthene concentration with longer arrows. Furthermore, OTUs of Proteobacteria phylum plotted around particular samples were confirmed to have a different composition of Proteobacteria phylum among the sample sites. Evaluating the relationship between soil PAHs concentration and bacterial community composition may provide useful information for the remediation of PAH contaminated sites.

No MeSH data available.


Map showing the sampling locations in Xuzhou city.
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ijerph-13-00878-f001: Map showing the sampling locations in Xuzhou city.

Mentions: Figure 1 demonstrates the locations of sampling sites. These location sites include the following: there were seven samples (px1–px7) collected from the Datun electric power plant, three samples (hr1–hr3) near the Huarun power plant, three samples (dt1–dt3) along the Datang power plant, three samples (hm1–hm3) along the Huamei plant, three samples (yz1–yz3) near the Yaozhuang power plant and four samples (qt1–qt4) near the Quantai power plant.


Spatial Variability of PAHs and Microbial Community Structure in Surrounding Surficial Soil of Coal-Fired Power Plants in Xuzhou, China
Map showing the sampling locations in Xuzhou city.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5036711&req=5

ijerph-13-00878-f001: Map showing the sampling locations in Xuzhou city.
Mentions: Figure 1 demonstrates the locations of sampling sites. These location sites include the following: there were seven samples (px1–px7) collected from the Datun electric power plant, three samples (hr1–hr3) near the Huarun power plant, three samples (dt1–dt3) along the Datang power plant, three samples (hm1–hm3) along the Huamei plant, three samples (yz1–yz3) near the Yaozhuang power plant and four samples (qt1–qt4) near the Quantai power plant.

View Article: PubMed Central - PubMed

ABSTRACT

This work investigated the spatial profile and source analysis of polycyclic aromatic hydrocarbons (PAHs) in soil that surrounds coal-fired power plants in Xuzhou, China. High-throughput sequencing was employed to investigate the composition and structure of soil bacterial communities. The total concentration of 15 PAHs in the surface soils ranged from 164.87 to 3494.81 μg/kg dry weight. The spatial profile of PAHs was site-specific with a concentration of 1400.09–3494.81 μg/kg in Yaozhuang. Based on the qualitative and principal component analysis results, coal burning and vehicle emission were found to be the main sources of PAHs in the surface soils. The phylogenetic analysis revealed differences in bacterial community compositions among different sampling sites. Proteobacteria was the most abundant phylum, while Acidobacteria was the second most abundant. The orders of Campylobacterales, Desulfobacterales and Hydrogenophilales had the most significant differences in relative abundance among the sampling sites. The redundancy analysis revealed that the differences in bacterial communities could be explained by the organic matter content. They could also be explicated by the acenaphthene concentration with longer arrows. Furthermore, OTUs of Proteobacteria phylum plotted around particular samples were confirmed to have a different composition of Proteobacteria phylum among the sample sites. Evaluating the relationship between soil PAHs concentration and bacterial community composition may provide useful information for the remediation of PAH contaminated sites.

No MeSH data available.