title: [Concentration and emission fluxes of halogenated flame retardants in sewage from sewage outlet in Dongjiang River].
abstract: Fourteen sewage samples from sewage outlets in Dongjiang River were collected. Halogented flame retardants were extracted and purified using dichloromethane and alumina/silica-gel column, respectively. The concentrations of halogenated flame retardants were measured utilizing GC/MS, and the emission fluxes were estimated. Decabromodiphenyl ethane (DBDPE) was the predominant halogenated pollutant (accounting for 64%) in sewage with the concentration ranging from 9.1 ng/L to 990 ng/L. The concentrations of polybrominated biphenyl ether (PBDEs), dominated by BDE209, in the sewage ranged from 6.9 ng/L to 470 ng/L, accounting for 30% of total halogenated flame retardants. The concentrations of other flame retardants, such as dechlorane plus (DP), 1, 2-bis(2, 4, 6-tribromophenoxy) ethane (BTBPE), hexabromobenzene (HBB), and pentabromotoluene (PBT), were ranged within 0.17-23.6, nd-26.3, nd-1.45 and nd-0.45 ng/L, respectively. The concentrations of PBDEs in sewage of Dongjiang River were comparable to those in influent wastewater of sewage treatment plants of Guangzhou, suggesting that the wastewater was discharged directly into Dongjiang River without any treatment. The emission flux of halogenated flame retardants from sewage was 191 kg. Emission from industrial wastewater, contributed to 48%-91% of total emission, was the main source of halogenated flame retardants.
authors.affiliation: State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China. zyh_0919@163.com
authors.forename: Yan-Hong
authors.initials: YH
authors.lastname: Zeng
authors.forename: Xiao-Jun
authors.initials: XJ
authors.lastname: Luo
authors.forename: Yu-Xin
authors.initials: YX
authors.lastname: Sun
authors.forename: Le-Huan
authors.initials: LH
authors.lastname: Yu
authors.forename: She-Jun
authors.initials: SJ
authors.lastname: Chen
authors.forename: Bi-Xian
authors.initials: BX
authors.lastname: Mai
mesh_terms: D001969:Bromobenzenes / Q000032:analysis; D002681:China; D004784:Environmental Monitoring; D005411:Flame Retardants / Q000032:analysis*; D055768:Halogenated Diphenyl Ethers / Q000032:analysis; D006219:Halogens / Q000032:analysis*; D045483:Rivers; D012722:Sewage / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D001969:Bromobenzenes; D005411:Flame Retardants; D055768:Halogenated Diphenyl Ethers; D006219:Halogens; D012722:Sewage; D014874:Water Pollutants, Chemical; C491509:decabromodiphenyl ethane