title: Sedimentary records of hydroxylated and methoxylated polybrominated diphenyl ethers in the southern Yellow Sea.
abstract: Although hydroxylated (OH-) and methoxylated (MeO-) polybrominated diphenyl ethers (PBDEs) have caused much concern in recent years, few reports had discussed on their input history. In this study, we measured the contents of nine MeO-BDEs, ten OH-BDEs, and total organic carbon (TOC) of two sediment cores from the southern Yellow Sea. 6-MeO-BDE-47, 2'-MeO-BDE-68, 6-OH-BDE-47, and 2'-OH-BDE-68 were the predominant congeners in HH12, while only 2'-OH-BDE-68 and 6-OH-BDE-47 were frequently detected in core HH11. The records showed that OH-/MeO-BDEs in both cores had increased rapidly since the 1950s. Their existence was detected at the bottom layers (∼1800 s) prior to the production of PBDEs (1960s), thus OH-/MeO-BDEs originate from natural origins rather than artificial PBDEs. Comparisons between TOC and OH-/MeO-BDEs indicated that TOC is a potential factor affecting the accumulation of OH-/MeO-BDEs in marine environments. Similar trends and significant correlations between OH-BDEs and MeO-BDEs suggest their common origins or interconversion.
authors.affiliation: Key Laboratory of Marine Chemistry Theory and Technology (Ocean University of China), Ministry of Education/Qingdao Collaborative Innovation Center of Marine Science and Technology, Qingdao 266100, China; Institute of Marine Organic Geochemistry, Ocean University of China, Qingdao 266100, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Fan
authors.affiliation: College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Lan
authors.affiliation: Key Laboratory of Marine Chemistry Theory and Technology (Ocean University of China), Ministry of Education/Qingdao Collaborative Innovation Center of Marine Science and Technology, Qingdao 266100, China; Institute of Marine Organic Geochemistry, Ocean University of China, Qingdao 266100, China. Electronic address: zhaozongshan@ouc.edu.cn.
authors.forename: Zongshan
authors.initials: Z
authors.lastname: Zhao
authors.affiliation: Key Laboratory of Marine Chemistry Theory and Technology (Ocean University of China), Ministry of Education/Qingdao Collaborative Innovation Center of Marine Science and Technology, Qingdao 266100, China; Institute of Marine Organic Geochemistry, Ocean University of China, Qingdao 266100, China.
authors.forename: Meixun
authors.initials: M
authors.lastname: Zhao
mesh_terms: D002681:China; D019015:Geologic Sediments / Q000737:chemistry*; D055768:Halogenated Diphenyl Ethers / Q000737:chemistry*; D009792:Oceans and Seas; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D055768:Halogenated Diphenyl Ethers; D014874:Water Pollutants, Chemical
keywords: Historical trend; MeO-BDEs; OH-BDEs; Sediment core; Southern Yellow Sea