Hydrocarbons in Surface Sediments from the Changjiang (Yangtze River) Estuary, East China Sea

Bouloubassi, Ioanna; Fillaux, Joëlle; Saliot, A.

doi:10.1016/s0025-326x(01)00149-7

Cited by 194 publications

(86 citation statements)

References 73 publications

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“…The carbon preference index (CPI) of the LCalks, ratio of (nC27 + nC29 + nC31)/(nC26 + nC28 + nC30), ranged from 4 to 13, further supporting evidence that the LCalks were derived from fresh higher plant waxes (Table 2, Schefuß et al, 2003;Wang et al, 2003). The origins of SCalks, in contrast, characterized by nC17 homologue predominance and low CPIs (ratio of (nC15 + nC17 + nC19)/(nC16 + nC18 + nC20)) from 0.3 to 1.1 (0.72 ± 0.23) in the study area, were in agreement with the input from phytoplankton (Bouloubassi et al, 2001). …”

Section: N-alkanessupporting

confidence: 81%

Sources and preservation of sedimentary organic matter in the Southern Bohai Sea and the Yellow Sea: Evidence from lipid biomarkers

Lin

Wang

Chen

et al. 2014

Marine Pollution Bulletin

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a b s t r a c tThe region of Southern Bohai Sea (SBS) and Yellow Sea (YS) represents one of the best examples of large river-dominated ocean margins. The transport and accumulation of sediments played a primary role in distribution of the lipids in the region and could lead to a preferential accumulation of these more refractory land-based lipids. The spatial distribution of total organic carbon (TOC) matched with the lipid distributions over the shelf, and high TOC presented in the central YS, but TOC burial fluxes decreased from 110 ton/km 2 /yr of SBS to 25-32 ton/km 2 /yr of YS. Good correlations were observed between terrestrial n-alkanes and TOC in the sediments of SBS and northern YS, but they were poor for southern YS, meanwhile higher ratios of nC27 + nC29 + nC31/nC15 + nC17 + nC19 (12 ± 6) were observed in SBS, and lower in YS (2.2 ± 1.0), suggesting the Yellow River discharge was an important source of terrestrial organic matter to the shelf.

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Section: N-alkanessupporting

confidence: 81%

Sources and preservation of sedimentary organic matter in the Southern Bohai Sea and the Yellow Sea: Evidence from lipid biomarkers

Lin

Wang

Chen

et al. 2014

Marine Pollution Bulletin

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“…Concentrations of total aliphatic hydrocarbons in the investigated deep basins of the EMS are comparable to those reported for surface sediments in unpolluted to moderately polluted coastal and/or open-sea areas in the Mediterranean, such as the Cretan Sea (Gogou et al, 2000), the north Aegean Sea (Hatzianestis et al, 1998), the open northwestern Mediterranean Sea (Tolosa et al, 1996), and in other sites worldwide, e.g., the East China Sea (Bouloubassi et al, 2001), the open Black Sea (Wakeham, 1996) and southern New England (Venkatesan et al, 1987). They are at least one order of magnitude lower than those reported for coastal areas subjected to enhanced urban and/or fluvial inputs such as Saronikos Gulf, Greece (Sklivagou et al, 2008); the coastal area off Barcelona, Spain (Tolosa et al, 1996); the Danube estuary, Black Sea (Readman et al, 2002;Wakeham, 1996); and the coastal area off Alexandria, Egypt (Aboul-Kassim and Simoneit, 1995).…”

Section: Aliphatic and Polycyclic Aromatic Hydrocarbons Levelssupporting

confidence: 77%

“…9a). The latter, varying between 0.22 and 0.87 (Table 3), allows for the assessment of fossil vs. pyrolytic / combustion PAH mixtures spatial trends (e.g., Bouloubassi et al, 2001Bouloubassi et al, , 2012.…”

Section: Regional Characteristics Of Sedimentary Aliphatic and Polycymentioning

confidence: 99%

Occurrence, sources and transport pathways of natural and anthropogenic hydrocarbons in deep-sea sediments of the eastern Mediterranean Sea

et al. 2013

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Abstract. Surface sediments collected from deep basins (1018-4087 m depth) of the eastern Mediterranean Sea (Ionian Sea, southern Aegean Sea and northwestern Levantine Sea) were analyzed for aliphatic and polycyclic aromatic hydrocarbons as tracers of natural and anthropogenic inputs. Concentrations of total aliphatic hydrocarbons, n-alkanes and the unresolved complex mixture (UCM) of aliphatic hydrocarbons varied significantly, ranging from 1.34 to 49.2 µg g −1 , 145 to 4810 ng g −1 and 0.73 to 36.7 µg g −1 , respectively, while concentrations of total polycyclic aromatic hydrocarbons (PAHs) ranged between 11.6 and 223 ng g −1 . Molecular profiles of determined hydrocarbons reflect a mixed contribution from both natural and anthropogenic sources in deep-sea sediments of the eastern Mediterranean Sea, i.e., terrestrial plant waxes, degraded petroleum products, unburned fossil fuels and combustion of grass, wood and coal. Hydrocarbon mixtures display significant variability amongst sub-regions, reflecting differences in the relative importance of inputs from various sources and phase associations/transport pathways of individual hydrocarbons that impact on their overall distribution and fate. Hydrocarbon concentrations correlated significantly with the organic carbon content of sediments, indicating that the latter exerts an important control on their transport and ultimate accumulation in deep basins. Additionally, water masses' circulation characteristics also seem to influence the regional features and distribution patterns of hydrocarbons. Our findings highlight the role of deep basins/canyons as repositories of both natural and anthropogenic chemical species.

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“…In the last decade, many studies have focused on the contamination of sediment in the Yangtze estuary by organic micropollutants including PAHs (Liu et al, 2000;Xu et al, 2001;Hui et al, 2009), aliphatic hydrocarbons (Bouloubassi et al, 2001), organochlorine pesticides (OCPs) (Liu et al, 2003(Liu et al, , 2008, PCBs (Liu et al, 2003;Shen et al, 2006), and polybrominated diphenyl ethers (Chen et al, 2006;Shen et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Organic micropollutants in the Yangtze River: Seasonal occurrence and annual loads

Müller

Pernet-Coudrier

et al. 2014

Science of The Total Environment

102

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• The Yangtze River drains 40% of China's mainland with 400 million inhabitants • Monthly concentrations and annual loads of organic pollutants were determined • Seasonality of loads of PAHs, most pesticides, and antiinfectives were concise • In spite of low concentrations due to high water discharge, pollutant loads are considerable a b s t r a c t a r t i c l e i n f o Twenty percent of the water run-off from China's land surface drains into the Yangtze River and carries the sewage of approximately 400 million people out to sea. The lower stretch of the Yangtze therefore offers the opportunity to assess the pollutant discharge of a huge population. To establish a comprehensive assessment of micropollutants, river water samples were collected monthly from May 2009 to June 2010 along a crosssection at the lowermost hydrological station of the Yangtze River not influenced by the tide (Datong Station, Anhui province). Following a prescreening of 268 target compounds, we examined the occurrence, seasonal variation, and annual loads of 117 organic micropollutants, including 51 pesticides, 43 pharmaceuticals, 7 household and industrial chemicals, and 16 polycyclic aromatic hydrocarbons (PAHs). During the 14-month study, the maximum concentrations of particulate PAHs (1-5 μg/g), pesticides (11-284 ng/L), pharmaceuticals (5-224 ng/L), and household and industrial chemicals (4-430 ng/L) were generally lower than in other Chinese rivers due to the dilution caused of the Yangtze River's average water discharge of approximately 30,000 m 3 /s. The loads of most pesticides, anti-infectives, and PAHs were higher in the wet season compared to the dry season, which was attributed to the increased agricultural application of chemicals in the summer, an elevated water discharge through the sewer systems and wastewater treatment plants (WWTP) as a result of high hydraulic loads and the related lower treatment efficiency, and seasonally increased deposition from the atmosphere and runoff from the catchment. The estimated annual load of PAHs in the river accounted for some 4% of the total emission of PAHs in the whole Yangtze Basin. Furthermore, by using sucralose as a tracer for domestic wastewater, we estimate a daily disposal of approximately 47 million m 3 of sewage into the river, corresponding to 1.8% of its average hydraulic load. In summary, the annual amounts flushed by the Yangtze River into the East China Sea were 2.9 × 10 6 tons of dissolved and particulate organic carbon (DOC and POC), 369 tons of PAHs, 98 tons of pesticides, 152 tons of pharmaceuticals, and 273 tons of household and industrial chemicals. While the concentrations seem comparably moderate, the pollutant loads are considerable and pose an increasing burden to the health of the marine coastal ecosystem.

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Hydrocarbons in Surface Sediments from the Changjiang (Yangtze River) Estuary, East China Sea

Cited by 194 publications

References 73 publications

Sources and preservation of sedimentary organic matter in the Southern Bohai Sea and the Yellow Sea: Evidence from lipid biomarkers

Sources and preservation of sedimentary organic matter in the Southern Bohai Sea and the Yellow Sea: Evidence from lipid biomarkers

Occurrence, sources and transport pathways of natural and anthropogenic hydrocarbons in deep-sea sediments of the eastern Mediterranean Sea

Organic micropollutants in the Yangtze River: Seasonal occurrence and annual loads

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