title: [History of heavy metal pollution from tidal flat in Haizhou Bay].
abstract: Coastal zone could be considered as an important sink of regional source to sink and preserve historical records of environmental evolution. Four sediment cores, collected from tidal flat at Haizhou Bay near Lianyungang City, were examined for concentrations of heavy metals including Cd, Cr, Cu, Mn, Pb and Zn in core sediments to investigate the historical input of trace metals. In addition, sediment rates of cores LH3 and LH4 were determined based on radionuclide 210Pb. The results showed that grain size control effect was not the main factor that influenced the distribution of heavy metals. Heavy metals concentrations in the surface sediments were higher than these regional background values. Furthermore, Al element as a proxy of grain size was selected for normalization and calculation of metal enrichment factor (EF) and anthropogenic heavy metal fluxes. The results revealed that heavy metals in tidal flats were continuously enriched in the past decades, meanwhile, tidal flats have been significantly subjected to contaminations due to anthropogenic activities. Moreover, the depth profiles of heavy metals fluxes correspond to scenario of social-economy development of Lianyungang, which is an important urban area near Haizhou Bay. From 1950s to 2005, anthropogenic fluxes of metals increased with fluctuations, whereas, since 2005 anthropogenic fluxes declined, which may be correlated to the adjustment of industrial structure as well as the strengthened environmental regulation.
authors.affiliation: Department of Marine Technology, School of Geodesy and Geomatics Engineering, Huaihai Institute of Technology, Lianyungang 222005, China. rzhang_838@163.com
authors.forename: Rui
authors.initials: R
authors.lastname: Zhang
authors.forename: Fan
authors.initials: F
authors.lastname: Zhang
authors.forename: Fu-Cheng
authors.initials: FC
authors.lastname: Liu
authors.forename: Fu-Jun
authors.initials: FJ
authors.lastname: Yin
authors.forename: Ying-Jun
authors.initials: YJ
authors.lastname: Ding
authors.forename: Jin-Rong
authors.initials: JR
authors.lastname: Gao
authors.forename: Jing
authors.initials: J
authors.lastname: Chen
authors.forename: Wei
authors.initials: W
authors.lastname: Shao
mesh_terms: D061006:Bays; D002681:China; D004784:Environmental Monitoring; D019015:Geologic Sediments / Q000737:chemistry*; D049673:History, 20th Century; D049674:History, 21st Century; D019216:Metals, Heavy / Q000032:analysis*; D012623:Seawater / Q000032:analysis; D055871:Tidal Waves; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014876:Water Pollution / Q000266:history*
chemical_list: D019216:Metals, Heavy; D014874:Water Pollutants, Chemical