title: Linear alkylbenzenes in riverine runoff of the Pearl River Delta (China) and their application as anthropogenic molecular markers in coastal environments.
abstract: The average concentrations of SigmaLABs (sum of C10-C13-LABs) in runoff samples collected from the eight major riverine outlets of the Pearl River Delta (PRD) of China ranged from 1.4 to 6124 ng/L in the dissolved phase and from 0.01 to 11.4 microg/g dry weight in the particulate phase during March 2005-February 2006. The annual riverine flux of SigmaLABs from the PRD to the coastal ocean was estimated at approximately 14 tons/yr. The inventories of SigmaLABs in agricultural lands of Guangdong Province ranged from 313 to 1825 kg/yr. The early and late rice fields were the major sink of LABs, accounting for approximately 68% of total LABs inventory in agricultural lands. The social-economically estimated annual discharge of LABs from household detergents in the PRD was approximately 696 tons/yr, more than an order of magnitude higher than that estimated from field measurements (about 14 tons/yr), which was attributed to several factors.
authors.affiliation: State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, P.O. Box 1131, Wushan, Guangzhou 510640, China.
authors.forename: Hong-Gang
authors.initials: HG
authors.lastname: Ni
authors.forename: Feng-Hui
authors.initials: FH
authors.lastname: Lu
authors.forename: Ji-Zhong
authors.initials: JZ
authors.lastname: Wang
authors.forename: Yu-Feng
authors.initials: YF
authors.lastname: Guan
authors.forename: Xian-Lin
authors.initials: XL
authors.lastname: Luo
authors.forename: Eddy Y
authors.initials: EY
authors.lastname: Zeng
mesh_terms: D000383:Agriculture; D000473:Alkanes / Q000032:analysis*; D002681:China; D002947:Cities; D004784:Environmental Monitoring / Q000379:methods*; D019015:Geologic Sediments / Q000737:chemistry*; D007220:Industrial Waste; D052638:Particulate Matter; D045483:Rivers; D012623:Seawater; D013501:Surface-Active Agents / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D000473:Alkanes; D007220:Industrial Waste; D052638:Particulate Matter; D013501:Surface-Active Agents; D014874:Water Pollutants, Chemical