Priority Pollutant Polycyclic Aromatic Hydrocarbons in Florida Sediments

Miles, Carl J.; Delfino, Joseph J.

doi:10.1007/s001289900970

Cited by 9 publications

(2 citation statements)

References 12 publications

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“…Consequently, total PAHs levels appeared to decrease as the distance from urban/industrial centers increases. This trend has been globally observed and reported in previous works (Laflamme and Hites 1978;Cantillo et al 1997;Miles and Delfino 1999).…”

Section: Pahs Concentrationssupporting

confidence: 72%

Presence, distribution, and origins of polycyclic aromatic hydrocarbons (PAHs) in sediments from Bahía Blanca estuary, Argentina

Arias

Botello

Tombesi

et al. 2008

Environ Monit Assess

110

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This paper is the first comprehensive survey of polycyclic aromatic hydrocarbons (PAHs) in coastal sediments in Bahia Blanca, Argentina, and provides useful information on their levels of concentration, composition, and sources of these pollutants. The total concentrations of PAHs ranged from 15 to 10,260 ng g(-1). The highest contents (mean 3,315 ng g(-1)) of total PAHs in marine sediments were found in the inner channels of the estuary, while the lower ones (204 ng g(-1)) belong to samples collected far away from contamination sources. The global average recorded in this study (1,500 ng g(-1)) indicates that the studied area lies within the referenced category of industrialized coastal zones under chronic pollution. The diagenetic PAH contribution was found to be negligible at all sampled locations; however, the calculation of molecular ratios determined an overimposition of pyrolitic PAHs over the petrogenic input. Further, the use of principal components analysis (PCA) clearly separated ring group compounds and enabled the determination of pyrolitic/combustion PAHs dominancy.

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Section: Pahs Concentrationssupporting

confidence: 72%

Presence, distribution, and origins of polycyclic aromatic hydrocarbons (PAHs) in sediments from Bahía Blanca estuary, Argentina

Arias

Botello

Tombesi

et al. 2008

Environ Monit Assess

110

View full text Add to dashboard Cite

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“…Polycyclic aromatic hydrocarbons (PAHs) are a class of organic pollutants that are commonly found in the environment, largely due to combustion or processing of hydrocarbon fuels (1)(2)(3)(4)(5). Aerobic biodegradation is an important attenuation mechanism for PAHs in the environment (6), so the ability to estimate PAH biodegradation rates is important for predicting environmental fate and for designing remediation efforts.…”

Section: Introductionmentioning

confidence: 99%

Polycyclic Aromatic Hydrocarbon Biodegradation Rates: A Structure-Based Study

Wammer

Peters

2005

Environ. Sci. Technol.

118

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This study was designed to examine the role of molecular structure in determining the biodegradation rates of polycyclic aromatic hydrocarbons (PAHs). Laboratory experiments were performed in aqueous systems, and data were analyzed in a manner that allowed determination of first-order biodegradation rates independent of bioavailability limitations from physical-chemical processes. An aerobic mixed culture was used, which had been enriched on a broad range of PAHs. The 22 PAHs included in this study ranged in size from two to four rings and included compounds with 5-carbon rings and alkyl substituents. The range of observed biodegradation rates was only 1 order of magnitude, which is much less than that which is typically observed in the field. This supports the findings of other types of studies, which conclude that most of the observed variation in environmental PAH biodegradation rates comes from processes controlling the bioavailability of the compounds and not processes controlling uptake or biotransformation. Rate differences that were observed were attributable either to the presence of a 5-carbon ring or an alkyl substituent in an alpha position. Various molecular descriptors that might be expected to correlate with rate-limiting steps in the biodegradation process were used in an attemptto develop a quantitative structure-activity relationship for the PAH biodegradation rates. No significant correlations were found, but rate limitation from interactions with the relevant enzymes remains a possibility.

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