title: Historical record of lead accumulation and source in the tidal flat of Haizhou Bay, Yellow Sea: Insights from lead isotopes.
abstract: In order to investigate the historical records of lead contamination and source in coastal region of Haizhou Bay, Yellow Sea, a sediment core was collected from tidal flat, dated by (210)Pb and (137)Cs. Lead and its stable isotopic ratios were determined. The profiles of enrichment factor (EF) and Pb isotope ratios showed increasing trend upward throughout the core, correlating closely with the experience of a rapid economic and industrial development of the catchment. According to Pb isotopic ratios, coal combustion emission mainly contributed to the Pb burden in sediments. Based on end-member model, coal combustion emission dominated anthropogenic Pb sources in recent decades contributing from 48% to 67% in sediment. And the contribution of leaded gasoline was lower than 20%. A stable increase of coal combustion source was found in sediment core, while the contribution of leaded gasoline had declined recently, with the phase-out of leaded gasoline in China.
authors.affiliation: Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, People's Republic of China; School of Geodesy and Geomatics Engineering, Huaihai Institute of Technology, Lianyungang 222005, Jiangsu Province, People's Republic of China; State Key Laboratory of Pollution Control and Resources Reuse, Nanjing University, Nanjing 210093, People's Republic of China. Electronic address: rzhang_838@163.com.
authors.forename: Rui
authors.initials: R
authors.lastname: Zhang
authors.affiliation: School of Geodesy and Geomatics Engineering, Huaihai Institute of Technology, Lianyungang 222005, Jiangsu Province, People's Republic of China.
authors.forename: Minglei
authors.initials: M
authors.lastname: Guan
authors.affiliation: School of Geodesy and Geomatics Engineering, Huaihai Institute of Technology, Lianyungang 222005, Jiangsu Province, People's Republic of China.
authors.forename: Yujie
authors.initials: Y
authors.lastname: Shu
authors.affiliation: School of Geodesy and Geomatics Engineering, Huaihai Institute of Technology, Lianyungang 222005, Jiangsu Province, People's Republic of China.
authors.forename: Liya
authors.initials: L
authors.lastname: Shen
authors.affiliation: School of Geodesy and Geomatics Engineering, Huaihai Institute of Technology, Lianyungang 222005, Jiangsu Province, People's Republic of China.
authors.forename: Xixi
authors.initials: X
authors.lastname: Chen
authors.affiliation: Department of Chemical Engineering, Huaihai Institute of Technology, Lianyungang 222005, Jiangsu Province, People's Republic of China.
authors.forename: Fan
authors.initials: F
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, People's Republic of China; First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, People's Republic of China. Electronic address: tgli@qdio.ac.cn.
authors.forename: Tiegang
authors.initials: T
authors.lastname: Li
mesh_terms: D061006:Bays / Q000737:chemistry*; D002681:China; D003031:Coal; D004784:Environmental Monitoring / Q000266:history / Q000379:methods*; D019015:Geologic Sediments / Q000737:chemistry*; D049673:History, 20th Century; D049674:History, 21st Century; D007221:Industry; D007854:Lead / Q000032:analysis*; D007856:Lead Radioisotopes; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D003031:Coal; D007856:Lead Radioisotopes; D014874:Water Pollutants, Chemical; D007854:Lead
keywords: (137)Cs; (210)Pb; Anthropogenic input; Lead isotopes; Source identifications