Bioremediation of a soil contaminated by hydrocarbon mixtures: the residual concentration problem

Nocentini, Massimo; Pinelli, Davide; Fava, Fabio

doi:10.1016/s0045-6535(00)00057-6

Cited by 126 publications

(77 citation statements)

References 8 publications

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“…[9][10][11][12] As reported by Heitzer and Sayler, while pollutants and intermediates are important chemical monitoring parameters, only the formation of end products such as CO 2 provides direct proof of the complete destruction and mineralization of a pollutant. 13 A Hewlett-Packard 5890A II gas chromatograph was used to analyze the headspaces from hermetically stopper Pyrex filter flask containing soil and liquid samples.…”

Section: Determinationmentioning

confidence: 95%

Preliminary identification of the bioremediation limiting factors of a clay bearing soil contaminated with crude oil

Rizzo¹,

Cunha²,

Santos³

et al. 2008

J. Braz. Chem. Soc.

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A biorremediação é uma alternativa atraente para o tratamento de solos contaminados com hidrocarbonetos de petróleo. No entanto, a efetividade do processo pode ser limitada não só pelas características do contaminante, mas também pela sua biodisponibilidade. Este trabalho tem como meta o estabelecimento de procedimento preliminar para identificar o fator principal (recalcitrância ou biodisponibilidade) que interfere negativamente na biodegradação, resultando em baixas eficiên-cias. Foram realizados testes em microcosmos contendo solo aplicando as técnicas de bioestímulo e bioaumento. Experimentos semelhantes foram conduzidos em meio líquido contendo óleo cru e microorganismos extraídos do solo contaminado, nutrientes e inóculo microbiano (Rhodoturula glutinis e Nocardia nova). Após 30 dias, o maior nível de biodegradação (98.8%) foi obtido na condição com bioaumento em meio líquido, indicando que o problema principal de biodegradação de hidrocarbonetos de petróleo pode estar associado à baixa biodisponibilidade destes no solo e não apenas a recalcitrância intrínseca do poluente residual.Bioremediation is an attractive alternative to treat soils contaminated with petroleum hydrocarbons. However, the effectiveness of biodegradation process can be limited by both contaminant characteristics and its bioavailability in soil. This work aims at establishing a preliminary procedure to identify the main factor (hydrocarbon recalcitrance or its bioavailability) that impairs the biodegradation, possibly resulting in low remediation efficiencies. Tests in soil microcosms were carried out applying biostimulation and bioaugmentation techniques. Similar experiments were conducted using liquid medium containing crude oil and microorganisms, both of them extracted from a weathered contaminated soil sample, nutrients and microbial inoculum constituted of Rhodoturula glutinis and Nocardia nova. After 30 days, highest microcosms biodegradation levels (98.8%) were obtained with bioaugmentation in liquid medium, pointing out that the main problem of petroleum hydrocarbon utilization by microorganisms was associated to its availability and not only to the intrinsic recalcitrancy of remaining pollutants.

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Section: Determinationmentioning

confidence: 95%

Preliminary identification of the bioremediation limiting factors of a clay bearing soil contaminated with crude oil

Rizzo¹,

Cunha²,

Santos³

et al. 2008

J. Braz. Chem. Soc.

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“…During pure oxygen aeration, the release rate of CO 2 is 0.013 mol/d. However, the production of CO 2 is reduced to 0.004 mol/d during air aeration [27] . In addition, tillage separate the soil block into small ones and mixes the soil.…”

Section: Design Of the Experimentsmentioning

confidence: 99%

Bioremediation of Crude Oil Contaminated Soil by Petroleum-Degrading Active Bacteria

Xu¹

2012

Introduction to Enhanced Oil Recovery (EOR) Processes and Bioremediation of Oil-Contaminated Sites

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“…Thus, it is assumed that the microorganisms had a longer adaptation time, and when the biopiles were constructed after the pretreatment, the developing stage of the microorganisms could have been optimal, and degradation of contaminants was not so slow. Other authors have demonstrated the importance of aeration in this type of treatments, since their experiments with aeration reached a reduction of up to 95% in the first or second month of treatment, as compared to the control without aeration that did not depict a significant reduction in contaminants concentration [17][18][19].…”

Section: Parametermentioning

confidence: 99%

Bioremediation for a Soil Contaminated with Hydrocarbons

Iturbe¹,

López²

2015

J Pet Environ Biotechnol

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The objective was to remediate, through biopiles, 27400 m 3 of soil contaminated with heavy fraction hydrocarbons (HFH) at a Maritime Terminal in southeastern Mexico. To clean the soil, two bioremediation stages were considered: i) batches of soil of 3800 m 3 subjected to land farming pretreatment, ii) biopiles formation of 70 m length, 16 m width, and 2 m height. The parameters controlled during 8 months of bioremediation were: nutrients, water content, aeration, and temperature. Monitoring contemplated monthly sampling of each biopile, the analyzed parameters were the heavy fraction hydrocarbons, bacteria counting, and respirometry. Results revealed that HFH removal in biopiles reached 43.2% after pre-treatment (land farming), 68.7% at mid-treatment, and 77.7% at the end of treatment. The land farming pretreatment achieved a higher percentage of hydrocarbons removal, because aeration was very efficient at the start of treatment; therefore, enhancing aerobic biodegradation.

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Bioremediation of a soil contaminated by hydrocarbon mixtures: the residual concentration problem

Cited by 126 publications

References 8 publications

Preliminary identification of the bioremediation limiting factors of a clay bearing soil contaminated with crude oil

Preliminary identification of the bioremediation limiting factors of a clay bearing soil contaminated with crude oil

Bioremediation of Crude Oil Contaminated Soil by Petroleum-Degrading Active Bacteria

Bioremediation for a Soil Contaminated with Hydrocarbons

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