NDLI: Occurrence and mass loadings of n-alkanes in riverine runoff of the Pearl River Delta, South China: global implications for levels and inputs.

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Occurrence and mass loadings of n-alkanes in riverine runoff of the Pearl River Delta, South China: global implications for levels and inputs.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Wang, Ji-Zhong Ni, Hong-Gang Guan, Yu-Feng Zeng, Eddy Y.
Spatial Coverage	China
Description	Country affiliation: China Author Affiliation: Wang JZ ( State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Science, 511 Kehua Street, Tianhe District Guangzhou 510640, China.)
Abstract	Riverine runoff samples were collected monthly from March 2005 to February 2006 from the eight major outlets of the Pearl River Delta (PRD), South China, and analyzed to obtain the concentrations of n-alkanes in both the filtrate and particulate phases. The average concentrations of Sigma(C15-C34) (i.e., sum of C15 to C34 normal alkanes) ranged from 0.06 to 2.97 microg/L (mean, 0.64 microg/L) in filtrate samples and from 1.00 to 98.8 microg/g (average, 19.8 microg/g dry weight) in particulate samples. Compared to results from around the world, the levels of hydrocarbon compounds in the PRD were at the high end of the global range. Evaluation of compositional indices of n-alkanes indicated that petroleum-related sources are the main contributor of n-alkanes found in the PRD, with minor contributions from high plant wax. Regression analyses appeared to suggest that n-alkanes are transported into the aquatic environment of the PRD via various pathways, and the transport mechanisms also are considerably influenced by the complex hydrologic conditions in the PRD. The annual riverine input of Sigma(C15-C34) from the PRD to the coastal ocean was 360 tons/year, or the equivalent of approximately 8,800 tons/year of petroleum hydrocarbons. The emission of Sigma(C15-C34) from all sources in the PRD was estimated at 39,000 tons/year, or 2.4 g/day per capita. Overall, the PRD contributes approximately 0.2% of the annual global input of n-alkanes to the coastal oceans, similar to the contributions of polycyclic aromatic hydrocarbons, further indicating that the PRD has been a significant source of hydrocarbon contamination to the global coastal marine environment.
File Format	HTM / HTML
ISSN	07307268
Issue Number	10
Volume Number	27
e-ISSN	15528618
Journal	Environmental Toxicology and Chemistry
Language	English
Publisher	Wiley
Publisher Date	2008-10-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Water Pollutants, Chemical Research Support, Non-u.s. Gov't Data Interpretation, Statistical Discipline Environmental Health Gas Chromatography-mass Spectrometry Hydrocarbons Discipline Toxicology Alkanes Journal Article Water Pollution Analysis China Discipline Chemistry Fresh Water Statistics & Numerical Data Quality Control
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Health, Toxicology and Mutagenesis

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Occurrence and mass loadings of n-alkanes in riverine runoff of the Pearl River Delta, South China: global implications for levels and inputs.

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