Pyrolysis GC–MS for the rapid environmental forensic screening of contaminated brownfield soil

Lara-Gonzalo, Azucena; Kruge, Michael A.; Lores, Iván; Gutiérrez, Beatriz; Gallego, José Luis

doi:10.1016/j.orggeochem.2015.06.012

Cited by 20 publications

(7 citation statements)

References 40 publications

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“…Multicomponent contamination on these sites often hinders the determination of the pollution sources to be eliminated in the ulterior remediation treatment, especially when the soil and subsoil is affected by distinct mixtures of compounds and/or weathering has modified the chemistry and toxicity of the contaminants. All of these processes are a challenge for environmental forensics studies (Lara-Gonzalo et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, pyrometallurgical processes, such as those used in many metallurgy and chemical industries, facilitate the direct contact of fossil fuels with roasted material, which may promote the simultaneous presence heavy metal(loid)s of PAHs and other organic and organometallic compounds in waste products . In this context, in order to determine the presence of pyrogenic and petrogenic compounds, quantitative analytical methods may be complemented with qualitative methods by means of molecular ratios measured in a GC-MS (Gas Chromatography-Mass Spectrometry) equipment (Lara-Gonzalo et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Insights into a 20-ha multi-contaminated brownfield megasite: An environmental forensics approach

Gallego¹,

Rodríguez-Valdés²,

Esquinas³

et al. 2016

Science of The Total Environment

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Insights into a 20-ha multi-contaminated brownfield megasite: An environmental forensics approach

Gallego¹,

Rodríguez-Valdés²,

Esquinas³

et al. 2016

Science of The Total Environment

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“…Regarding the qualitative evolution of the contaminants, there was a remarkable reduction in the abundance and variety of the initial pool of contaminants after 15 days of treatment (Figures 4 and 5; for more details about the variety of contaminants present on this site, see [40]). This reduction affected mainly lighter PAHs and specially alkyl-PAHs (see peaks 6,8,17, and 21 in Figure 4).…”

Section: Chemical Analysismentioning

confidence: 99%

“…Soil was collected from a PAH-polluted site in Venta del Gallo (Llanera, Asturias, North Spain; 43 • 24 52 , −5 • 48 57 ) at an altitude of 300 m. This site had previously been used by a chemical factory producing naphthalene, resins, phenols, and other compounds from coal tar processing. A wide variety of contaminants were found in the soils of this area (in the 2.5 Ha original parcel and in the surroundings) as a result of spills and unsuitable waste disposal practices over decades [40].…”

Section: Samples and Soil Characteristicsmentioning

confidence: 99%

Bioaugmentation Treatment of a PAH-Polluted Soil in a Slurry Bioreactor

et al. 2020

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A bioslurry reactor was designed and used to treat loamy clay soil polluted with polycyclic aromatic hydrocarbons (PAHs). To this end, biostimulation alone, or combined with bioaugmentation with two bacterial strains (Rhodocccus erythropolis and Pseudomonas stuzeri) previously isolated from the polluted site, was applied. The PAH concentrations decreased notably after 15 days in all of the treatments. The concentrations of the two- and three-ring compounds fell by >80%, and, remarkably, the four- to six-ring PAHs also showed a marked decrease (>70%). These results thus indicate the capacity of bioslurry treatments to improve, notably, the degradation yields obtained in a previous real-scale remediation carried out using biopiles. In this sense, the remarkable results for recalcitrant PAHs can be attributed to the increase pollutants’ bioavailability achieves in the slurry bioreactors. Regarding bioaugmentation, although treatment with R. erythropolis led to a somewhat greater reduction of lighter PAHs at 15 days, the most time-effective treatment was achieved using P. stutzeri, which led to an 84% depletion of total PAHs in only three days. The effects of microbial degradation of other organic compounds were also monitored by means of combined qualitative and quantitative gas chromatography mass spectrometry (GC–MS) tools, as was the evolution of microbial populations, which was analyzed by culture and molecular fingerprinting experiments. On the basis of our findings, bioslurry technology emerges as a rapid and operative option for the remediation of polluted sites, especially for fine soil fractions with a high load of recalcitrant pollutants.

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“…Similarly, whilst research on brownfield soil contaminated with coal tar has shown harmful persistent organic pollutants following pyrolysis (e.g. volatile aromatics, furans and polyaromatic hydrocarbons) (Lara-gonzalo et al, 2015); (Abdel-Shafy and Mansour, 2016) there is again limited work in characterising oilcontaminated brownfield soil for land remediation. Therefore, to investigate the breadth of pollutants anticipated from the thermochemical recycling of these more complex waste materials, acetone was tested as a low cost scrubber, that offers compatibility with a standard GC-MS set-up (Maštovská and Lehotay, 2004), and a wider dissolution range for alternative pollutants.…”

Section: Introductionmentioning

confidence: 99%

A preliminary investigation of anaerobically digested municipal sludge cake and contaminated soil for recycling by pyrolysis

Sullivan

Prigmore²,

Knight³

et al. 2020

Bioresource Technology Reports

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This work has investigated the potential of pyrolysis as a recycling solution for two largely uncharacterised waste streams, anaerobically digested (AD) municipal sludge cake and brownfield soil (contaminated with oily sludge). Characterisation of emitted organic compounds from pyrolysis were captured in a solvent (acetone) scrubber and analysed by GC-MS. Both AD sludge cake and brownfield soil showed considerable promise for 'green-er' fuels, as a source of syngas (with CO supplementation) and volatile aromatics essential for fuel quality. However, these waste streams also generated significant amounts of additional highly toxic pollutants of varying chemistries, further emphasising the importance of using a trapping approach applicable to a broader range of chemicals. Pleasingly the acetone trap showed very good efficacy in capturing this breadth of chemistries, supporting its use as an alternative capture and preparative method, for monitoring volatile and semi-volatile organic tars Keywords Scrubber Pyrolysis/gasification contaminants Tar analysis Gas chromatography-thermal conductivity detection (GC-TCD) Gas chromatography-mass spectrometry (GC-MS)

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Pyrolysis GC–MS for the rapid environmental forensic screening of contaminated brownfield soil

Cited by 20 publications

References 40 publications

Insights into a 20-ha multi-contaminated brownfield megasite: An environmental forensics approach

Insights into a 20-ha multi-contaminated brownfield megasite: An environmental forensics approach

Bioaugmentation Treatment of a PAH-Polluted Soil in a Slurry Bioreactor

A preliminary investigation of anaerobically digested municipal sludge cake and contaminated soil for recycling by pyrolysis

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