Non-aromatic hydrocarbons in suspended matter from Changjiang (Yangtse River) estuary: Their characterization and variation in winter and summer (low- and high-flow) conditions

Qiu, Yixi; Bigot, Marie; Saliot, A.

doi:10.1016/0272-7714(91)90004-u

Cited by 21 publications

(5 citation statements)

References 26 publications

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“…Seven predominant components were n-C 17 , pristane, n-C 18 , n-C 19:1 , n-C 19 , n-C 21:6 and squalene; other n-alkanes up to C 35 were minor. This pattern was similar to the one found at station 1 in DH2 reported by Qiu et al (1991) although in this latter case squalene was not found. The 7 hydrocarbons are produced chiefly from plankton (Winters et al, 1969;Blumer et al, 1971) and for simplicity are termed planktonically-derived hydrocarbons (PDHCs) in the present study.…”

Section: Aliphatic Hydrocarbonssupporting

confidence: 90%

“…Relatively lower percentages (range 6-27%, average 13%, calculated from their data) of PDHCs were obtained in this previous case. Another study reported the occurrence of five types of aliphatic hydrocarbon distributions in the Changjiang Estuary by Qiu et al (1991). The results of the present study, based on samples located farther off shore, only show two distributions of n-alkanes that can be differentiated by the proportion of PDHC's, one with high amounts of these alkanes and alkenes, and the other by near equal concentrations of n-alkanes.…”

Section: Aliphatic Hydrocarbonscontrasting

confidence: 71%

“…A detailed study of summer chlorophyll a distribution indicates that there is a hot spot of chlorophyll a in seawater on the mid-shelf of the ECS (Gong et al, 1996). Previous studies on non-aromatic hydrocarbons in suspended matter from the Changjiang Estuary (Qiu et al, 1991) showed that anthropogenic and/or petrogenic inputs were distributed around the river mouth, being more widespread in winter than in summer. On the other hand, Sicre et al (1993a) studied n-alkanes and polycyclic aromatic hydrocarbons in the suspended particles from the Changjiang Estuary, and observed that terrestrial and anthropogenic inputs prevailed.…”

Section: Introductionmentioning

confidence: 98%

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Lipids in suspended matter and sediments from the East China Sea Shelf

Jeng

Huh

2004

Organic Geochemistry

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Section: Aliphatic Hydrocarbonssupporting

confidence: 90%

Section: Aliphatic Hydrocarbonscontrasting

confidence: 71%

Section: Introductionmentioning

confidence: 98%

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Lipids in suspended matter and sediments from the East China Sea Shelf

Jeng

Huh

2004

Organic Geochemistry

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“…Indeed, the carbon number maximum (C max ) peak height at nC 29 and nC 31 seen for all locations (except Imb3) represents the presence of biogenic organic matter derived from higher plant waxes. The values of around 1 and C max at nC 16 , as found in the sediment sample of Imb3, can be attributed to higher bacterial activities (Qiu et al 1991) and the fact that this site is located in the harbor dock inside the Imbituba Tip where the contribution of petroleum derivatives may be higher.…”

Section: N-alkanes and Isoprenoid Hydrocarbonsmentioning

confidence: 94%

Assessment and sources of nonaromatic hydrocarbons in surface sediments of three harbors in Santa Catarina State, Brazil

Oliveira

Madureira

2010

Environ Monit Assess

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Nonaromatic hydrocarbons and geochemical parameters from 17 sediment-water interface samples were used to assess sources of organic matter in three harbors, located in Santa Catarina State, southern Brazil. The evaluation was based on the molar C/N/P ratios, abundance of resolved nonaromatic hydrocarbons (3.0-25.9 μg g(-1)), unresolved complex mixture, and two indexes: the carbon preference index (CPI) and the low molecular weight to high molecular weight ratio. The results indicate that the organic matter is predominantly of terrestrial origin (C/N>10 and CPI>2). Variations in the total organic carbon from 0.43 to 2.98 mmol g(-1) and total phosphorus from 82.4 to 464.3 μg g(-1) showed no clear correlation with the silt and clay fractions of the sediments possibly due to anthropogenic input. In contrast to the low level of contamination based on the acyclic hydrocarbon distribution, the results obtained from a series of geologically stable hopanes and steranes reveal the presence of less degradable petroleum derivatives.

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“…Watershed classification (right) adapted from Milliman and Syvitski [1992]. Sediment tPAHs sources: [1‐ Doong and Lin , 2004], [2‐ Guzzella et al , 2005], [3‐ Bouloubassi et al , 2001], [4‐ Li , 2000; 5‐ Qiu et al , 1991], [6‐ Overton et al , 2004], [7‐ Colombo et al , 2006], [8‐ Bigot et al , 1989; 9‐ Li , 2000], [10‐ Kim et al , 1999], [11‐ Lipiatou and Saliot , 1991], [12‐ Magi et al , 2002; 13‐ Guzzella and DePaolis , 1994], [14‐ Yang , 2000; 15‐ Chen et al , 2006], [16‐ Luo et al , 2006], [17‐ Boonyatumanond et al , 2006], [18,19‐ Yunker et al , 1996, 2002], [20‐ Prahl and Carpenter , 1983].…”

Section: Discussionmentioning

confidence: 99%

Oceanic loading of wildfire‐derived organic compounds from a small mountainous river

et al. 2008

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[1] Small mountainous rivers (SMRs) export substantial amounts of sediment into the world's oceans. The concomitant yield of organic carbon (OC) associated with this class of rivers has also been shown to be significant and compositionally unique. We report here excessively high loadings of polycyclic aromatic hydrocarbons (PAHs), lignin, and levoglucosan, discharged from the Santa Clara River into the Santa Barbara Channel. The abundance of PAHs, levoglucosan, and lignin in Santa Barbara Channel sediments ranged from 201.7 to 1232.3 ng gdw À1 , 1.3 to 6.9 mg gdw À1 , and 0.3 to 2.2 mg per 100 mg of the sedimentary OC, respectively. Assuming a constant rate of sediment accumulation, the annual fluxes of PAHs, levoglucosan, and lignin, to the Santa Barbara Channel were respectively, 885.5 ± 170.2 ng cm À2 a À1 , 3.5 ± 1.9 mg cm À2 a À1 and 1.4 ± 0.3 mg per 100 mg OC cm À2 a À1 , over $30 years. The close agreement between PAHs, levoglucosan, and lignin abundance suggests that the depositional flux of these compounds is largely biomass combustion-derived. To that end, use of the Santa Clara River as a model for SMRs suggests this class of rivers may be one of the largest contributors of pyrolyzed carbon to coastal systems and the open ocean. Wildfire associated carbon discharged from other high yield fluvial systems, when considered collectively, may be a significant source of lignin, pyrolytic PAHs, and other pyrogenic compounds to the ocean. Extrapolating these methods over geologic time may offer useful historical information about carbon sequestration and burial in coastal sediments and affect coastal carbon budgets.

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Non-aromatic hydrocarbons in suspended matter from Changjiang (Yangtse River) estuary: Their characterization and variation in winter and summer (low- and high-flow) conditions

Cited by 21 publications

References 26 publications

Lipids in suspended matter and sediments from the East China Sea Shelf

Lipids in suspended matter and sediments from the East China Sea Shelf

Assessment and sources of nonaromatic hydrocarbons in surface sediments of three harbors in Santa Catarina State, Brazil

Oceanic loading of wildfire‐derived organic compounds from a small mountainous river

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