Dose–effect of nitrogen regulation on the bioremediation of diesel contaminated soil

Environmental Technology & Innovation, Journal Year: 2023, Volume and Issue: 32, P. 103245 - 103245

Published: June 16, 2023

Nitrogen regulation is an effective method to enhance the bioremediation of hydrocarbon contamination. In this study, various dosages two types nitrogen sources were spiked diesel contaminated soil in a 60-day microcosmic experiment. The results showed that total petroleum (TPH) degradation rate improved from control test 32.03% highest 44.74% with spiking. Peptone and KNO3 significantly diesel-contaminated soil, peptone was more than at low dosage. C:N ratio 20:1 (T1 treatment addition peptone) optimal treatment. effect on pH reverse, high dose increased pH, but decreased pH. bacteria diversity treated while changes just opposite. Furthermore, changed structure bacterial community, Rubrobacter, Solirubrobacter Gaiella, which belonging Actinomycetota, identified as three common genus degrading ability different amended soil. had mechanisms properties these provides us options for acid or alkaline

Language: Английский

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Biochar-bacteria-plant combined potential for remediation of oil-contaminated soil

Frontiers in Microbiology, Journal Year: 2024, Volume and Issue: 15

Published: May 21, 2024

Oil pollution is a common type of soil organic that harmful to the ecosystem. Bioremediation, particularly microbe-assisted phytoremediation oil-contaminated soil, has become research hotspot in recent years. In order explore more appropriate bioremediation strategies for oil contamination and mechanism remediation, we compared remediation effects three plants when applied combination with microbial agent biochar. The combined approach Tagetes erecta , agent, biochar exhibited best plant growth highest total petroleum hydrocarbons degradation efficiency (76.60%). addition, all methods provided varying degrees restoration carbon nitrogen contents soils. High-throughput sequencing found community diversity richness were enhanced most restored Some microorganisms associated promotion such as Cavicella C1_B045 Sphingomonas MND1 Bacillus Ramlibacter identified this study, among which was major component agent. positively correlated indicators tested substantially enriched rhizosphere T. . Functional gene prediction bacterial based on KEGG database revealed pathways carbohydrate metabolism amino acid up-regulated during This study provides potential method efficient soils thoroughly examines biochar–bacteria–plant mechanisms well from perspective communities.

Language: Английский

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Nitrate determines the bacterial habitat specialization and impacts microbial functions in a subsurface karst cave

Frontiers in Microbiology, Journal Year: 2023, Volume and Issue: 14

Published: Feb. 9, 2023

Karst caves are usually considered as natural laboratories to study pristine microbiomes in subsurface biosphere. However, effects of the increasingly detected nitrate underground karst ecosystem due acid rain impact on microbiota and their functions have remained largely unknown. In this study, samples weathered rocks sediments were collected from Chang Cave, Hubei province subjected high-throughput sequencing 16S rRNA genes. The results showed that significantly impacted bacterial compositions, interactions, different habitats. Bacterial communities clustered according habitats with distinguished indicator groups identified for each individual habitat. Nitrate shaped overall across two a contribution 27.2%, whereas pH TOC, respectively, structured sediments. Alpha beta diversities increased concentration both habitats, directly affecting alpha diversity sediments, but indirectly by lowering pH. more at genus level than because genera correlated rocks. Diverse keystone taxa involved nitrogen cycling co-occurrence networks such reducers, ammonium-oxidizers, N 2 -fixers. Tax4Fun2 analysis further confirmed dominance genes cycling. Genes methane metabolism carbon fixation also dominant. dissimilatory assimilatory reduction substantiated functions. Our first time revealed terms functions, providing an important reference deciphering disturbance human activities

Language: Английский

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Community ecological study on the reduction of soil antimony bioavailability by SRB-based remediation technologies

Journal of Hazardous Materials, Journal Year: 2023, Volume and Issue: 459, P. 132256 - 132256

Published: Aug. 9, 2023

Language: Английский

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Effects of Different Mulching Practices on Soil Environment and Fruit Quality in Peach Orchards

Plants, Journal Year: 2024, Volume and Issue: 13(6), P. 827 - 827

Published: March 13, 2024

Mulching practices have been used to improve peach growth and production across the globe. However, impact of mulching on physiochemical properties soil characteristics orchards remains largely unknown. This study aimed decipher impacts various patterns environment quality Prunus persica fruit in “Zijinhuangcui”. Three treatments were set up, which included black ground fabric mulch (BF) two living grass (HV: hairy vetch RG: ryegrass). The results showed that different effects soil, plant growth, quality. Living treatments, especially HV treatment, significantly improved nutrients by enhancing nitrogen-related indicators. Of note, BF treatment had higher total phosphorus available contents than RG treatments. highest relative abundance Proteobacteria (33.49%), is associated with symbiotic nitrogen fixation, followed (25.62%), (22.38%) at young stage. Similarly, Terrimonas, has a unique fixation system genus level, was (HV, 1.30–3.13% RG, 2.27–4.24%) treatment. also promoted tree increased sugar content, sugar-related components, sugar-acid ratio, reduced acid content. Collectively, findings this show can promote improving fertility, bacterial diversity, richness.

Language: Английский

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Occurrence of polycyclic aromatic compounds and interdomain microbial communities in oilfield soils

Environmental Research, Journal Year: 2022, Volume and Issue: 212, P. 113191 - 113191

Published: March 26, 2022

Language: Английский

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The ecological response and distribution characteristics of microorganisms and polycyclic aromatic hydrocarbons in a retired coal gas plant post-thermal remediation site

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 857, P. 159314 - 159314

Published: Oct. 8, 2022

Language: Английский

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Wastewater discharges alter microbial community composition in surface waters of the canadian prairies

Chemosphere, Journal Year: 2023, Volume and Issue: 334, P. 138991 - 138991

Published: May 18, 2023

Language: Английский

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Hydrocarbon bioremediation in a pilot-scale: A combination of bioaugmentation, phytoremediation, and vermiremediation

Environmental Technology & Innovation, Journal Year: 2023, Volume and Issue: 31, P. 103210 - 103210

Published: May 19, 2023

This work aimed to validate the removal of total petroleum hydrocarbons (TPH) in a pilot system (on-site). Six piles oil-contaminated soil were treated with 1) bioremediation (BIO) by three simultaneous technologies (bioaugmentation (bacterial consortium), phyto- (Panicum maximum) and vermiremediation (Pontoscolex corethrurus)), compared 2) natural attenuation (NA). Removal alkanes, polycyclic aromatics (PAH), (TPH), bacterial diversity evaluated at 0, 35, 70, 112 days. Biomass number shoots P. maximum, secondary vegetation, abundance meso macrofauna measured initially end. After days, BIO significantly removed more alkanes (76%), PAH (68%), TPH (76%) than NA treatment (23%, 19%, 24%). maximum biomass increased (300%), 97.3 ± 11.8 m−2. plants Lippia dulcis, Taraxacum officinale, Bidens pilosa phylum Actinobacteria (18%) most abundant. The earthworm Protozapotecia australis was reduced, while abundant group mesofauna Acari (56%–71%). combination improved development grass plants, which generated favorable microhabitat for organisms remove efficiently.

Language: Английский

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Characterization and identification of long-chain hydrocarbon-degrading bacterial communities in long-term chronically polluted soil in Ogoniland: an integrated approach using culture-dependent and independent methods

Environmental Science and Pollution Research, Journal Year: 2024, Volume and Issue: 31(21), P. 30867 - 30885

Published: April 15, 2024

Escalating oil consumption has resulted in an increase accidental spills of petroleum hydrocarbons, causing severe environmental degradation, notably vulnerable regions like the Niger Delta. Complex mixture these hydrocarbons particularly long-chain alkanes presents unique challenges restoration polluted environment due to their chemical properties. This study aimed investigate hydrocarbon-degrading bacterial communities within long-term chronically soil Ogoniland, by utilizing both traditional cultivation methods and modern culture-independent techniques. Results revealed that surface-polluted (SPS) subsurface (SPSS) exhibit significantly higher total organic carbon (TOC) ranging from 5.64 5.06% (TPH) levels 36,775 ppm 14,087 ppm, compared unpolluted (UPS) with 1.97% TOC 479 TPH, respectively. Analysis chain lengths reveals prevalence longer-chain (C20-28) surface soil. Culture-dependent methods, crude enrichment (COE) paraffin wax (PWE), yield 47 isolates subjected a alkane degradation assay. Twelve strains demonstrate significant abilities across all enriched media. Three members, namely Pseudomonas sp. (almA), Marinomonas Alteromonas (ladA), genes responsible for demonstrating efficiency between 50 80%. Culture-independent analysis SPS samples greater species richness diversity SPSS samples. Proteobacteria dominates as phylum sample types, 22.23 82.61%, Firmicutes (0.2-2.22%), Actinobacteria (0.4-3.02%), Acidobacteria (0.1-3.53%) also prevalent. Bacterial profiles at genus level distinct variations among populations comprising number hydrocarbon degraders functional predictions highlight presence potential catabolic (nahAa, adh2, cpnA) However, culture-dependent only captured few dominant members found analysis, implying more specialized media or environments are needed isolate members. The findings this contribute valuable information ecological biotechnological aspects, aiding development effective bioremediation applications restoring oil-contaminated environments.

Language: Английский

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