Linear alkylbenzenes in riverine runoff of the Pearl River Delta (China) and their application as anthropogenic molecular markers in coastal environments.
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.
Ni
Hong-Gang
HG
State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, P.O. Box 1131, Wushan, Guangzhou 510640, China.
Lu
Feng-Hui
FH
Wang
Ji-Zhong
JZ
Guan
Yu-Feng
YF
Luo
Xian-Lin
XL
Zeng
Eddy Y
EY
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*
D000473:Alkanes; D007220:Industrial Waste; D052638:Particulate Matter; D013501:Surface-Active Agents; D014874:Water Pollutants, Chemical