Hydrocarbons in surficial sediments from the Scotian Shelf

Keizer, Paul D.; Dale, Jacqueline; Gordon, Donald C.

doi:10.1016/0016-7037(78)90129-1

Cited by 40 publications

(8 citation statements)

References 9 publications

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“…2a and b). This is in agreement with previous findings by Eganhouse and Kaplan [19] who reported C 14 and C 16 as the major nalkanes in the PLWTP effluents in 1979. The LMW/HMW ranged from 0.8 to 1.6 in the PLWTP effluents.…”

Section: Implications Of the Ah Compositional Indicessupporting

confidence: 94%

“…The last three indices, C 17 /pristane (C 17 /Pri), C 18 /phytane (C 18 /Phy), and pristane/phytane (Pri/Phy) are related to the presence of isoprenoids in AH mixtures. In petroleum‐contaminated samples, the concentrations of pristane and phytane are nearly equal [7,16]. In addition, zooplankton can convert ingested phytol to pristane, which may be the principal source of pristane found in other aquatic organisms [6,17,18].…”

Section: Methodsmentioning

confidence: 99%

“…Solid samples (sediments, sediment trap particulates, and filters loaded with particulates from aqueous samples) were extracted three times (16,6, and 16 h) with methylene chloride using a roller table. The combined extract was cleaned, fractionated, and concentrated to 0.5 ml.…”

Section: Sample Collection and Extractionmentioning

confidence: 99%

“…This ratio is usually near unity in petroleum products or in plankton and benthic algae [8,13] and commonly has lower values in higher plants [8]. The C 16 ratio, defined as sum of all n-alkanes divided by n-C 16 , is usually high (i.e., 50) for biogenic materials compared to relatively low values (i.e., 15) in petroleum-contaminated samples [8], because n-C 16 is rarely found in biolipids [15].…”

Section: Ah Compositional Indicesmentioning

confidence: 99%

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Organic pollutants in the coastal environment off San Diego, California. 2. Petrogenic and biogenic sources of aliphatic hydrocarbons

Tran

Zeng

1997

Enviro Toxic and Chemistry

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Abstract-The results from the measurements of aliphatic hydrocarbons suggest that hydrocarbons in the Point Loma Wastewater Treatment Plant (PLWTP) effluents are mainly petroleum derived; those in the Tijuana River runoff have largely originated from terrestrial plants with visible petroleum contamination; and those in the sea surface microlayer, sediment traps, and sediments at various coastal locations off San Diego have mostly resulted from biogenic contributions with enhanced microbial products in the summer season. Rainfall in the winter season appeared to amplify the inputs from terrestrial higher plants to the coastal areas. The PLWTP discharged approximately 3.85 metric tons of n-alkanes (C 10 -C 35 ) in 1994, well below the level (136 metric tons) estimated in 1979. The input of aliphatic hydrocarbons from the Tijuana River was about 0.101 metric tons in 1994. Diffusion, solubilization, evaporation, and microbial degradation seemed partially responsible for the difference in the concentrations and compositions of aliphatic hydrocarbons in different sample media, although the relative importance of each mechanism cannot be readily discerned from the available data. The results from analyses of aliphatic hydrocarbon compositional indices are generally consistent with those of polycyclic aromatic hydrocarbons.

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Section: Implications Of the Ah Compositional Indicessupporting

confidence: 94%

Section: Methodsmentioning

confidence: 99%

Section: Sample Collection and Extractionmentioning

confidence: 99%

Section: Ah Compositional Indicesmentioning

confidence: 99%

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Organic pollutants in the coastal environment off San Diego, California. 2. Petrogenic and biogenic sources of aliphatic hydrocarbons

Tran

Zeng

1997

Enviro Toxic and Chemistry

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“…Farrington and Tripp (1977) were able to deduce from ,-alkane distributions and from the amounts of unresolved complex mixtures of aliphatic hydrocarbons that petroleum sources contribute to the total hydrocarbons present in New York Bight surface sediments and that land-derived hydrocarbons comprise at major portion of n-alkanes in marine sediments from continental shell', slope, and abyssal plain areas. In a similar study, Keizer et al (1978) determined from n-alkane and isoprenoid alkane distributions that biogenic terrestrial sources contributed the majority of hydrocarbons found in Scotian Shelf surficial sediments. From aliphatic hydrocarbon and sterol analysis of Mono Lake surficial sediments, Reed (1977) concluded that detrital organic debris from land sources predominates sfightly over organic matter derived from lake biota in the total organic composition of these sediments.…”

Section: Introductionmentioning

confidence: 86%

Fatty acids and hydrocarbons in surficial sediments of Lake Huron

Meyers

Takeuchi

1979

Organic Geochemistry

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Abslract Falty acid and hydrocarbon distributions in surficial sediments from ten locations in southern Lake Huron indicate both aquatic and terrigenous recent biological sources of these geolipid materials. Normal alkanoic acids appear to be derived primarily from aquatic sources whereas normal alkanes are from multiple origins. Geolipid distributions are determined by the nature of the biogenic source and are modified during transport and deposition. Sediments receiving urban runoff in Saginaw Bay contain large amounts of non-biogenic hydrocarbons of a petroleum or industrial nature.

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