Autotrophic metabolism considered to extend the applicability of the carbon balances model for assessing biodegradation in petroleum-hydrocarbon-contaminated aquifers with abnormally low dissolved inorganic carbon

Cai, Pingping; Ning, Zhuo; Zhang, Min; Guo, Caijuan; Niu, Manlan; Shi, Jiansheng

doi:10.1016/j.jclepro.2020.120738

Cited by 6 publications

(1 citation statement)

References 39 publications

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“…In the study, therefore, NSZD at a LNAPL-releasing site of a purification plant in Northwest China was assessed by the gradient method coupled with the quantification of the core genes encoding the methanogenesis and methane oxidation processes. This study extended for the first time the current knowledge of NSZD assessment in China, which is broadly applicable to thousands of similar petroleum-hydrocarbon-contaminated sites [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

Incorporating the Soil Gas Gradient Method and Functional Genes to Assess the Natural Source Zone Depletion at a Petroleum-Hydrocarbon-Contaminated Site of a Purification Plant in Northwest China

Ning

Sheng

Guo

et al. 2022

Life

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An increasing number of studies have demonstrated that natural source zone depletion (NSZD) in the vadose zone accounts for the majority (90%~99%) of the natural attenuation of light non-aqueous phase liquid (LNAPL). Until now, 0.05 to 12 kg/a.m2 NSZD rates at tens of petroleum LNAPL source zones have been determined in the middle or late evolution stage of LNAPL release, in which limited volatile organic compounds (VOCs) and methane (CH4) were detected. NSZD rates are normally estimated by the gradient method, yet the associated functional microbial activity remains poorly investigated. Herein, the NSZD at an LNAPL-releasing site was studied using both soil gas gradient methods quantifying the O2, CO2, CH4, and VOCs concentrations and molecular biology methods quantifying the abundance of the pmoA and mcrA genes. The results showed that the methanogenesis rates were around 4 to 40 kg/a.m2. The values were greater than the rates calculated by the sum of CH4 escaping (0.3~1.2 kg/a.m2) and O2 consuming (3~13 kg/a.m2) or CO2 generating rates (2~4 kg/a.m2), suggesting that the generated CH4 was oxidized but not thoroughly to CO2. The functional gene quantification also supported the indication of this process. Therefore, the NSZD rates at the site roughly equaled the methanogenesis rates (4~40 kg/a.m2), which were greater than most of the previously studied sites with a 90th percentile value of 4 kg/a.m2. The study extended the current knowledge of the NSZD and has significant implications for LNAPL remediation management.

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Section: Introductionmentioning

confidence: 99%

Incorporating the Soil Gas Gradient Method and Functional Genes to Assess the Natural Source Zone Depletion at a Petroleum-Hydrocarbon-Contaminated Site of a Purification Plant in Northwest China

Ning

Sheng

Guo

et al. 2022

Life

Self Cite

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Identification of carbon fixation microorganisms and pathways in an aquifer contaminated with long‐chain petroleum hydrocarbons

Gan,

Ning,

Wang

et al. 2024

Water Environment Research

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Petroleum hydrocarbons (PHCs) can be biodegraded into CO2, and PHC‐contaminated aquifers are always deemed as carbon sources. Fortunately, some carbon fixation microorganisms have been found in PHC‐contaminated sites. However, most of the studies are related to volatile short‐chain PHC, and few studies focus on long‐chain PHC‐contaminated sites. To reveal the carbon fixation microorganisms in these sites, in the study, a long‐chain PHC polluted site in North China was selected. Through hydrochemical and metagenomics analysis, the structure and capacity of carbon fixing microorganisms in the site were revealed. Results showed that there were many kinds of carbon fixed microorganisms that were identified such as Flavobacterium, Pseudomonas. HP/4HB, rTCA, and DC/4HB cycles were dominated carbon fixation pathways. The long‐chain PHC were weakly correlated with carbon fixation microorganisms, but it may stimulate the growth of some carbon fixation microorganisms, such as microorganisms involved in rTCA cycle.Practitioner Points The microorganisms with carbon fixation gene exist in the aquifer contaminated by long‐chain petroleum hydrocarbon. Microorganisms that have the ability to degrade petroleum also have the ability to carbon fixation. Long‐chain petroleum hydrocarbon may promote the growth of carbon fixation microorganisms.

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Metagenomic and isotopic insights into carbon fixation by autotrophic microorganisms in a petroleum hydrocarbon impacted red clay aquifer

Ning,

Sheng,

Gan

et al. 2024

Environmental Pollution

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Autotrophic metabolism considered to extend the applicability of the carbon balances model for assessing biodegradation in petroleum-hydrocarbon-contaminated aquifers with abnormally low dissolved inorganic carbon

Cited by 6 publications

References 39 publications

Incorporating the Soil Gas Gradient Method and Functional Genes to Assess the Natural Source Zone Depletion at a Petroleum-Hydrocarbon-Contaminated Site of a Purification Plant in Northwest China

Incorporating the Soil Gas Gradient Method and Functional Genes to Assess the Natural Source Zone Depletion at a Petroleum-Hydrocarbon-Contaminated Site of a Purification Plant in Northwest China

Identification of carbon fixation microorganisms and pathways in an aquifer contaminated with long‐chain petroleum hydrocarbons

Metagenomic and isotopic insights into carbon fixation by autotrophic microorganisms in a petroleum hydrocarbon impacted red clay aquifer

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