Effect of bioaugmentation and biostimulation on hydrocarbon degradation and microbial community composition in petroleum-contaminated loessal soil
| Autor: | Jialuo Wu, Manli Wu, Xi-Qiong Ye, Xiaohui Zhang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Bioaugmentation
China Environmental Engineering Environmental remediation Nitrogen Health Toxicology and Mutagenesis 0208 environmental biotechnology chemistry.chemical_element 02 engineering and technology 010501 environmental sciences complex mixtures 01 natural sciences Biostimulation Soil Nutrient Environmental Chemistry Soil Pollutants Environmental Restoration and Remediation Soil Microbiology 0105 earth and related environmental sciences Phosphorus Microbiota Public Health Environmental and Occupational Health High-Throughput Nucleotide Sequencing General Medicine General Chemistry Biodegradation Pollution Hydrocarbons 020801 environmental engineering Biodegradation Environmental Petroleum Microbial population biology chemistry Environmental chemistry Soil water Environmental science |
| Zdroj: | Chemosphere. 237 |
| ISSN: | 1879-1298 |
| Popis: | This study assessed the benefits of biostimulation with nitrogen and phosphorous (BS) versus bioaugmentation with native petroleum degrading flora (BA) in terms of petroleum hydrocarbon removal and microbial community structure shift in petroleum-polluted loessal soil. After 12 weeks of remediation, the TPH degradation efficiencies were 28.3% and 13.9% in BS and BA treated soils, respectively. Biostimulation was more effective than bioaugmentation for petroleum hydrocarbon degradation. Soil microbial community composition changed while microbial diversity decreased greatly by bioaugmentation treatment. The inoculum could survive, grow up quickly and become the predominant microorganisms after one week of inoculation. In the biostimulation treatment, microbial community composition is more evenness and richness than in the bioaugmented remediation. The strong positive correlations of the nitrogen and phosphorus with the petroleum hydrocarbon suggest the importance of nutrients for petroleum biodegradation in the contaminated loessal soil. The results indicate that the stabilization and variety of the microbial community structure are essential for the petroleum biodegradation performance. Further engineering is suggested to improve the evenness and richness of the soil microbial community since an abundance of nitrogen and phosphorus nutrients ensures the degraders' activity in the petroleum polluted soil. |
| Databáze: | OpenAIRE |
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