Removal of polycyclic aromatic hydrocarbons from soil: A comparison between bioremoval and supercritical fluids extraction

Amezcua‐Allieri, Myriam A.; Ávila-Chávez, Marco; Trejo, Arturo; Meléndez-Estrada, J.

doi:10.1016/j.chemosphere.2011.11.032

Cited by 41 publications

(24 citation statements)

References 33 publications

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“…To date, bioaugmentation and biostimulation are widely known technologies to remediate hydrocarbon-polluted sites (Amezcua-Allieri et al, 2012), whereby the addition of nutrients or microorganisms is required. Recently, in situ remediation of contaminated soils has received considerable attention due to its many advantages such as low cost and the avoidance of secondary pollution (Huang et al, 2011;Rulkens, 2005).…”

Section: Total Organic Carbon (Toc)mentioning

confidence: 99%

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Using sediment microbial fuel cells (SMFCs) for bioremediation of polycyclic aromatic hydrocarbons (PAHs)

Sherafatmand

2015

Bioresource Technology

133

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Section: Total Organic Carbon (Toc)mentioning

confidence: 99%

“…Biostimulation & bioaugmentations are widely known technologies to remediate hydrocarbons-polluted sites (Amezcua-Allieri et al, 2003, 2012Singer et al, 2005). Biodegradation is occurred by breaking down of PAHs using microorganisms, either in the presence of oxygen (i.e., aerobic condition) or without oxygen (i.e., anaerobic condition).…”

Section: Introductionmentioning

confidence: 99%

Using sediment microbial fuel cells (SMFCs) for bioremediation of polycyclic aromatic hydrocarbons (PAHs)

Sherafatmand

2015

Bioresource Technology

133

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“…8 In Brazil, the Sao Paulo state environmental company (CETESB) reported approximately 2900 contaminated areas in the state, of which 80% correspond to contamination by gas stations. [11][12][13] The contaminants removed aer a remediation process by SFE are easily destroyed by different methods, including incineration and chemical oxidation. However, the difficulty in nding appropriate forms of treatment is a current topic, especially when an in situ treatment is required, since the transport and storage of contaminated soils may increase the remediation process costs.…”

Section: Introductionmentioning

confidence: 99%

SPME determination of low concentration levels of monoaromatic chemical markers in soils after remediation by supercritical fluid extraction

et al. 2015

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Soil contamination by organic compounds has been a serious concern over the years. Among the various forms of pollutant release, gas station contamination has been widely emphasized. The presence of simple aromatic compounds in soils sampled near gas stations may indicate contamination, considering that such compounds are frequently found in petroleum-derived products. The present paper reports on the development of a process that uses pressurized fluids for the remediation of contaminated soils.Supercritical fluid extraction (SFE) employing CO 2 as the solvent and an 11.0 g capacity extraction cell was utilized. In order to demonstrate the efficiency of the process, an analytical procedure employing headspace-solid phase micro extraction (HS-SPME) as the sample preparation method and GC-MS as the separation technique was optimized and validated. Limits of quantification and detection obtained were in agreement with the values established by national and international regulatory agencies. The linear range obtained was from 10 to 260 mg kg À1 , with determination coefficients r 2 > 0.98 for all analyses. Different removal rates were observed for the contaminants studied, the best results being achieved by employing CO 2 in a supercritical state.

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“…Microorganisms remove PAHs from soil and even complex compounds, such as anthracene with three benzene rings, are dissipated within weeks (Amezcua-Allieri et al 2012). Numerous bacteria have been described that can degrade PAHs, such as phylotypes belonging to the genus Sphingomonas (Zhang et al 2011a), so they will be favoured (Jones et al 2011).…”

Section: Introductionmentioning

confidence: 97%

The bacterial community structure in an alkaline saline soil spiked with anthracene

Castro-Silva¹,

Ruíz-Valdiviezo²,

Valenzuela‐Encinas³

et al. 2013

Electron. J. Biotechnol.

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Background:The application of polycyclic aromatic hydrocarbons (PAHs) will affect the bacterial community structure as some groups will be favoured and others not. An alkaline saline soil with electrolytic conductivity (EC) 56 dS m -1 was spiked with anthracene and acetone while their effect on bacterial community structure was investigated. Results: The percentages of Acidobacteria and Actinobacteria decreased over time, while the percentage of Proteobacteria, mostly Xanthomonadales, increased. The percentage of the phylotypes belonging to the Nocardioides, Rhodococcus and Streptomyces, known degraders of PAHs, was larger in the anthracene-amended soil than in the acetone-amended and unamended soil at day 14. The phylotypes belonging to the genera Sphingomonas, also a known degrader of PAHs, however, was lower. Weighted and unweighted PCoA with UniFrac indicated that phylotypes were similar in the different treatments at day 0, but changed at day 1. After 14 days, phylotypes in the unamended and acetone-amended soil were similar, but different from those in the anthracene-spiked soil. Conclusions: It was found that incubating the soil and contaminating it with anthracene changed the bacterial community structure, but spiking the soil with acetone had little or no effect on the bacterial community structure compared to the unamended soil.

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Removal of polycyclic aromatic hydrocarbons from soil: A comparison between bioremoval and supercritical fluids extraction

Cited by 41 publications

References 33 publications

Using sediment microbial fuel cells (SMFCs) for bioremediation of polycyclic aromatic hydrocarbons (PAHs)

Using sediment microbial fuel cells (SMFCs) for bioremediation of polycyclic aromatic hydrocarbons (PAHs)

SPME determination of low concentration levels of monoaromatic chemical markers in soils after remediation by supercritical fluid extraction

The bacterial community structure in an alkaline saline soil spiked with anthracene

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