title: Occurrence of PBDEs and other alternative brominated flame retardants in sludge from wastewater treatment plants in Korea.
abstract: Studies on the occurrence of polybrominated diphenyl ethers (PBDEs) and other alternative brominated flame retardants in the environment are scarce. In this study, PBDEs and non-PBDE brominated flame retardants (NBFRs), including decabromodiphenyl ethane (DBDPE) and 1,2-bis(2,4,6-tribromophenoxy)ethane (BTBPE), were measured in sludge collected from three types of wastewater treatment plants (WWTPs) in Korea. Total concentrations of PBDEs (∑PBDE) in sludge ranged from 298 to 48,000 (mean: 3240) ng/g dry weight. Among 10 NBFRs analyzed, DBDPE and BTBPE were the only ones detected in sludge samples. Concentrations of DBDPE and BTBPE ranged from <LOQ to 3100 (mean: 237) ng/g dry weight and from <LOQ to 21.0 (mean: 1.57) ng/g dry weight, respectively. Concentrations of PBDEs and DBDPE determined in sludge were higher than those reported in other countries. The highest concentrations of ∑PBDE and DBDPE were found in sludge samples originated from industrial-WWTPs (I-WWTPs), suggesting that industrial activities are a major source of these contaminants. Non-parametric multidimensional scaling ordination showed that congener profiles of PBDEs in sludge are dependent on the types of WWTPs. Almost all sludge samples contained a low ratio (mean: 0.18) of DBDPE/BDE 209, indicating an on-going contamination by PBDEs in Korea. However, the high ratios (>1) of DBDPE/BDE 209 were found in sludge from I-WWTPs, reflecting a shift in the usage pattern of BFRs by the Korean industry. The nationwide annual emission fluxes of ∑PBDE, DBDPE and BTBPE via WWTPs to the environment were estimated to be 7400, 480, and 3.7 kg/year, respectively. This is the first study on the occurrence of alternative brominated flame retardants in sludge from Korea.
authors.affiliation: Department of Marine Sciences and Convergent Technology, College of Science and Technology, Hanyang University, Ansan 426-791, Republic of Korea.
authors.forename: Sunggyu
authors.initials: S
authors.lastname: Lee
authors.affiliation: Institute of Environmental and Energy Technology, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea.
authors.forename: Geum-Ju
authors.initials: GJ
authors.lastname: Song
authors.affiliation: Wadsworth Center, New York State Department of Health, and Department of Environmental Health Sciences, School of Public Health, State University of New York at Albany, Empire State Plaza, P.O. Box 509, Albany, NY 12201-0509, USA.
authors.forename: Kurunthachalam
authors.initials: K
authors.lastname: Kannan
authors.affiliation: Department of Marine Sciences and Convergent Technology, College of Science and Technology, Hanyang University, Ansan 426-791, Republic of Korea. Electronic address: hbmoon@hanyang.ac.kr.
authors.forename: Hyo-Bang
authors.initials: HB
authors.lastname: Moon
mesh_terms: D004784:Environmental Monitoring; D005411:Flame Retardants / Q000032:analysis*; D055768:Halogenated Diphenyl Ethers / Q000032:analysis*; D056910:Republic of Korea; D012722:Sewage / Q000737:chemistry*; D014865:Waste Disposal, Fluid; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D005411:Flame Retardants; D055768:Halogenated Diphenyl Ethers; D012722:Sewage; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: BTBPE; DBDPE; Flame retardants; PBDE; Sludge; WWTP