Photochemical degradation of crude oil: Comparison between direct irradiation, photocatalysis, and photocatalysis on zeolite

D’Auria, Maurizio; Emanuele, Lucia; Racioppi, Rocco; Velluzzi, Vincenzina

doi:10.1016/j.jhazmat.2008.07.111

Cited by 99 publications

(48 citation statements)

References 38 publications

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“…In our experience in this field, we used this method to determine fire accelerant in fire debris , volatile organic compounds in crude oil (D'Auria et al, 2009), olive oil (Bentivenga, D'Auria, Fedeli et al, 2004), wine (Acquaviva et al, 2014), saffron , truffles , honey (Bentivenga, D'Auria, Mauriello et al, 2004), horseradish (D'Auria et al, 2004) thymus, rosemary, laurel, sage (D'Auria and, lavender and oregano (D'Auria et al, 2005), kiwi (Celano at al., 2006), Monilinia species (Mang et al, 2015) and in the scent of an orchid (D'Auria et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

HS-SPME-GC-MS Analysis of onion (Allium cepa L.) and shallot (Allium ascalonicum L.)

D’Auria¹,

Racioppi²

2017

Food Res.

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The volatile organic compounds of onion and shallot were determined via HS-SPME-GC -MS. The main components were dipropyldisulphide and allylpropyldisulphide. Thiopropanal S-oxide were detected only in onion volatiles. In shallot is interesting the presence of 2-methyl-2-pentenal, a compound with an intense fruity aroma, that can characterize the different aroma between onion and shallot. The SPME-GC-MS analysis of shallot after absorption on the SPME fiber at 50°C showed the presence of new compounds, whose structures have been discussed.

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Section: Introductionmentioning

confidence: 99%

HS-SPME-GC-MS Analysis of onion (Allium cepa L.) and shallot (Allium ascalonicum L.)

D’Auria¹,

Racioppi²

2017

Food Res.

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“…The oil samples were deasphalted by precipitation with n-hexane followed by ltration. Then, about 5-50 mg of the concentrated extract was fortied with hexane solutions of surrogate standards containing d 10 -phenanthrene and d 10 -deuterated chrysene. The fortied extract were further fractioned by column chromatography using a 50 Â 1 cm i.d.…”

Section: Extraction Separation and Analysismentioning

confidence: 99%

Study of weathering effects on the distribution of aromatic steroid hydrocarbons in crude oils and oil residues

Wang

Chen

Zhang

et al. 2014

Environ. Sci.: Processes Impacts

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The composition and distribution of triaromatic steroid hydrocarbons in oil residues after biodegradation and photo-oxidation processes were detected, and the diagnostic ratios for oil spill identification were developed and evaluated based on the relative standard deviation (RSD) and the repeatability limit. The preferential loss of C 27 methyl triaromatic steranes (MTAS) relative to C 28 MTAS and C 29 MTAS was shown during the photo-oxidation process. In contrast to the photochemical degradation, the MTAS with the original 20R biological configuration was preferentially degraded during the biodegradation process. The RSD of most of the diagnostic ratios of MTAS ranged from 9 to 84% during the photooxidation process. However, the RSDs of such ratios derived from MTAS were all <5% even in high biodegradation, and such parameters may also provide new methods on oil spill identification. The parameters of monoaromatic sterane and monoaromatic sterane are not used well for oil spill identification after photo-oxidation. The triaromatic steroid hydrocarbons retained their molecular compositions after biodegradation and photo-oxidation and most of the diagnostic ratios derived from them could be efficiently used in oil spill identification. Environmental impactThe identication of oil spill sources is, in many cases, critical for providing forensic evidence in the investigation of oil spill accidents and settling disputes related to liability. The "multicriteria approach" for spill source identication is necessary. Besides the biological action, sunlight irradiation is another effect which alters the physicochemical properties of crude oil in the natural environment. In this paper, weathering effects on aromatic steroid hydrocarbon distribution in crude oils and oil residues derived from China were quantitatively studied and a number of diagnostic indices are developed and evaluated for oil correlation and differentiation.

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“…1). These weathering processes mainly include: evaporation, dissolution, microbial degradation, photooxidation, dispersion, water-oil emulsification, hydrolysis, adsorption onto suspended particulate materials, and oil-mineral aggregation (Boehm et al 1982;Wang et al 1997;Garrett et al 1998;Garcia de Oteyza and Grimalt 2006;D'Auria et al 2009). Biodegradation of hydrocarbon by natural pollutions of microorganisms is general a long-term weathering process and represents the primary mechanisms by which petroleum is eliminated from the marine environment.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the diagnostic ratios for the identification of spilled oils after biodegradation

et al. 2012

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Biodegradation, one of the most important weathering processes, alters the composition of spilled oil, making it difficult to identify the source of the release and to monitor its fate in the environment. A laboratory experiment was conducted to simulate oil spill weathering process of microbial degradation to investigate compositional changes in a range of source-and weatheringdependent molecular parameters in oil residues, and the conventional diagnostic ratios for oil spill identification were also evaluated. The conventional diagnostic ratios of n-alkane displayed obvious changes after biodegradation, especially for Pr/n-C 17 and Ph/n-C 18 with relative standard deviation more than 118.84 %, which suggests they are invalid for oil source identification of the middle-serious spill. Many polycyclic aromatic hydrocarbons (PAHs) are more resistant to biodegradation process than their saturated hydrocarbon counterparts, thus making PAHs to be one of the most valuable fingerprinting classes of hydrocarbons for oil identification. Biomarker ratios of hopanes and steranes were also useful for source identification even after moderate biodegradation, and the diagnostic ratios from them could be used in tracking origin and sources of hydrocarbon pollution. Finally, the carbon isotopic type curve may provide another diagnostic means for correlation and differentiation of spilled oils, and be particularly valuable for lighter refined products or severely biodegraded oils, the source of which may be difficult to identify by routine biomarker techniques.

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Photochemical degradation of crude oil: Comparison between direct irradiation, photocatalysis, and photocatalysis on zeolite

Cited by 99 publications

References 38 publications

HS-SPME-GC-MS Analysis of onion (Allium cepa L.) and shallot (Allium ascalonicum L.)

HS-SPME-GC-MS Analysis of onion (Allium cepa L.) and shallot (Allium ascalonicum L.)

Study of weathering effects on the distribution of aromatic steroid hydrocarbons in crude oils and oil residues

Evaluation of the diagnostic ratios for the identification of spilled oils after biodegradation

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