title: Biocides in the Yangtze River of China: spatiotemporal distribution, mass load and risk assessment.
abstract: Nineteen biocides were investigated in the Yangtze River to understand their spatiotemporal distribution, mass loads and ecological risks. Fourteen biocides were detected, with the highest concentrations up to 166 ng/L for DEET in surface water, and 54.3 ng/g dry weight (dw) for triclocarban in sediment. The dominant biocides were DEET and methylparaben, with their detection frequencies of 100% in both phases. An estimate of 152 t/y of 14 biocides was carried by the Yangtze River to the East China Sea. The distribution of biocides in the aquatic environments was significantly correlated to Gross Domestic Product (GDP), total phosphorus (TP) and total nitrogen (TN), suggesting dominant input sources from domestic wastewater of the cities along the river. Risk assessment showed high ecological risks posed by carbendazim in both phases and by triclosan in sediment. Therefore, proper measures should be taken to reduce the input of biocides into the river systems.
authors.affiliation: State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, PR China.
authors.forename: Wang-Rong
authors.initials: WR
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, PR China.
authors.forename: Jian-Liang
authors.initials: JL
authors.lastname: Zhao
authors.affiliation: State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, PR China.
authors.forename: You-Sheng
authors.initials: YS
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, PR China.
authors.forename: Zhi-Feng
authors.initials: ZF
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, PR China.
authors.forename: Yuan-Yuan
authors.initials: YY
authors.lastname: Yang
authors.affiliation: State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, PR China.
authors.forename: Qian-Qian
authors.initials: QQ
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, PR China. Electronic address: guangguo.ying@gmail.com.
authors.forename: Guang-Guo
authors.initials: GG
authors.lastname: Ying
mesh_terms: D002224:Carbanilides / Q000032:analysis; D002681:China; D002947:Cities; D004202:Disinfectants / Q000032:analysis*; D004784:Environmental Monitoring; D009584:Nitrogen / Q000032:analysis; D010758:Phosphorus / Q000032:analysis; D018570:Risk Assessment; D045483:Rivers / Q000737:chemistry*; D014260:Triclosan / Q000032:analysis; D062065:Wastewater / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D002224:Carbanilides; D004202:Disinfectants; D009584:Nitrogen; D010758:Phosphorus; D014260:Triclosan; D062065:Wastewater; D014874:Water Pollutants, Chemical; C009540:triclocarban
keywords: Biocides; Mass load; Risk assessment; River; Sediment; Water