title: Dioxin-like compounds in sediments from the Daliao River Estuary of Bohai Sea: distribution and their influencing factors.
abstract: The concentrations, compositional profiles, and potential ecological risk of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), polychlorinated biphenyls (PCBs) and polychlorinated naphthalenes (PCNs) in sediments of the Daliao River Estuary were investigated. Total concentrations of PCDD/Fs, PCBs, and PCNs were in the range of 11.3-133.2 ng/kg dry weight (dw), 1 971-37 632 ng/kg dw and 33.1-284.4ng/kg dw, respectively. The total TEQ values varied from 0.37 to 4.08ng/kg dw, with the dominant contributions by PCDD/Fs, then by PCBs and PCNs. The spatial distributions of PCDD/Fs, PCBs and PCNs in the river estuary were much related to hydrodynamic conditions. The risk of contamination to the deeper sea was increased in the flood seasons. Moreover, our data confirmed that both organic matter in sediments and molecular properties of dioxin-like compounds were the factors which strongly influenced the partition behavior of these dioxin-like compounds between sediments and water phase in the estuarine zone.
authors.affiliation: Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China.
authors.forename: Xiaofeng
authors.initials: X
authors.lastname: Zhao
authors.forename: Haijun
authors.initials: H
authors.lastname: Zhang
authors.forename: Jingfeng
authors.initials: J
authors.lastname: Fan
authors.forename: Daoming
authors.initials: D
authors.lastname: Guan
authors.forename: Huade
authors.initials: H
authors.lastname: Zhao
authors.forename: Yuwen
authors.initials: Y
authors.lastname: Ni
authors.forename: Yun
authors.initials: Y
authors.lastname: Li
authors.forename: Jiping
authors.initials: J
authors.lastname: Chen
mesh_terms: D001572:Benzofurans / Q000032:analysis; D002681:China; D000072338:Dibenzofurans, Polychlorinated; D004147:Dioxins / Q000032:analysis*; D004784:Environmental Monitoring; D019015:Geologic Sediments / Q000737:chemistry*; D007700:Kinetics; D009281:Naphthalenes / Q000032:analysis; D009792:Oceans and Seas; D011078:Polychlorinated Biphenyls / Q000032:analysis; D000072317:Polychlorinated Dibenzodioxins / Q000031:analogs & derivatives / Q000032:analysis; D045483:Rivers / Q000737:chemistry*; D012623:Seawater / Q000737:chemistry; D014872:Water Movements; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D001572:Benzofurans; D000072338:Dibenzofurans, Polychlorinated; D004147:Dioxins; D009281:Naphthalenes; D000072317:Polychlorinated Dibenzodioxins; D014874:Water Pollutants, Chemical; D011078:Polychlorinated Biphenyls