The purpose of this study was to investigate the mechanism by which phytoremediation systems promote hydrocarbon degradation in soil. The composition and degradation capacity of the bulk soil microbial community during the phytoremediation of soil contaminated with aged hydrocarbons was assessed. In the bulk soil, the level of catabolic genes involved in hydrocarbon degradation (ndoB, alkB, and xylE) as well as the mineralization of hexadecane and phenanthrene was higher in planted treatment cells than in treatment cells with no plants. There was no detectable shift in the 16S ribosomal DNA (rDNA) composition of the bulk soil community between treatments, but there were plant-specific and -selective effects on specific catabolic gene prevalence. Tall Fescue (Festuca arundinacea) increased the prevalence of ndoB, alkB, and xylE as well as naphthalene mineralization in rhizosphere soil compared to that in bulk soil. In contrast, Rose Clover (Trifolium hirtum) decreased catabolic gene prevalence and naphthalene mineralization in rhizosphere soil. The results demonstrated that phytoremediation systems increase the catabolic potential of rhizosphere soil by altering the functional composition of the microbial community. This change in composition was not detectable by 16S rDNA but was linked to specific functional genotypes with relevance to petroleum hydrocarbon degradation.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC152433 | PMC |
| http://dx.doi.org/10.1128/AEM.69.1.483-489.2003 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Acetochlor degradation in anaerobic microcosms with hyporheic sediments: Insights from biogeochemical data, transformation products, and isotope analysis.
Water Res
December 2024
Hubei Key Laboratory of Yangtze River Basin Environmental Aquatic Science, School of Environmental Studies & State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, 430074, Wuhan, PR China. Electronic address:
Steep redox gradients and diverse microbial communities in the anaerobic hyporheic zone create complex pathways for the degradation of herbicides, often linked to various terminal electron-accepting processes (TEAPs). Identifying the degradation pathways and their controlling factors under various TEAPs is of great significance for understanding mechanisms of water purification in the hyporheic zone. However, current research on herbicides in this area remains insufficient.
View Article and Find Full Text PDFSustainable improvement of granite sludge dust properties using microbially induced carbonate precipitation (MICP): strength enhancement, erosion prevention, and dust mitigation.
Environ Sci Pollut Res Int
January 2025
Department of Civil Engineering, National Institute of Technology Warangal, Warangal, 506004, India.
Granite sludge dust (GSD), a significant byproduct of granite processing globally, poses severe environmental and public health challenges, with India alone generating 200 million tons annually. The conventional use of GSD in soil stabilization and construction materials is limited to 20-30%, underscoring the urgent need for sustainable repurposing solutions within the circular economy catering to broader bulk utilization. Unlike traditional techniques, repurposing granite dust using microbially induced calcite precipitation (MICP) offers a sustainable low-impact and eco-friendly ground improvement solution.
View Article and Find Full Text PDFSoil quality under rotational and conventional grazing in Mediterranean areas at desertification risk.
J Environ Manage
January 2025
Università degli studi della Campania Luigi Vanvitelli, Caserta, Italy. Electronic address:
Rotational grazing (RG) could be a valid alternative to continuous grazing (CG) in Mediterranean extensive pastures to fight land degradation. This study aimed to compare soil quality under RG and CG management, in paired RG-CG Portuguese pasture areas under strong aridity stress, with RG sites converted from CG management in 2018. Soils were sampled in 2022, at 10 cm depth, over 71 ha of RG and 37 ha of CG pastures, subdivided in 16 and 10 sampling plots, respectively.
View Article and Find Full Text PDFStudy on the simulation of bridge deformation in a mining subsidence area.
Sci Rep
January 2025
School of Geodesy and Geomatics, Wuhan University, Wuhan, 430079, China.
Article Synopsis
- Bridges in mining areas experience deformations due to surface subsidence from underground mining, which can affect both the bridge structure and the foundation soil.
- The study focuses on a bridge in the Fengfeng mining area, using a probabilistic integral method to predict subsidence and constructing a finite element model for more accurate simulations.
- Collected monitoring data helps validate the simulation's accuracy, analyze discrepancies, and refine the model to predict potential bridge failure based on surface subsidence over time.
Stability and flow behavior of polymer-enhanced foams for improved in-situ remediation of hydrocarbons: Effect of polymer-surfactant interactions.
J Hazard Mater
December 2024
Univ. Grenoble Alpes, CNRS, IRD, Grenoble INP, IGE, Grenoble 38000, France.
Article Synopsis
- Conventional in-situ hydrocarbon remediation technologies struggle with high costs and limited effectiveness, making aqueous foam injection a more promising solution for better volumetric sweeping efficiency.
- This study focuses on polymer-enhanced foams (PEFs), specifically examining how Xanthan Gum (XG) biopolymer affects foam stability and flow in contaminated soils, using two types of PEFs: one based on Sodium Dodecyl Sulfate (SDS) and another blending SDS with Cocamidopropyl Hydroxysultane (SC).
- Results show that XG enhances foam stability through increased viscosity and improved interactions with surfactants, leading to higher recovery rates of hydrocarbons compared to traditional methods, suggesting a valuable avenue for future remediation efforts
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!