title: Spatial distribution and risk assessment of heavy metals in sediments of Shuangtaizi estuary, China.
abstract: In order to evaluate the spatial distribution and potential ecological risk of Pb, Cu, Zn, Cd, and Hg, the surface sediments were collected from 18 sites in the Shuangtaizi estuary. The concentrations of Pb, Cu, Zn, Cd, and Hg were analyzed by atomic absorption spectrophotometry and atomic fluorescence spectrometry after digestion. The particle sizes of the sediments were analyzed using a laser diffraction particle size analyzer. The results show that the heavy metal contents in the sediments are observed in the following order: Zn (18.25-126.75mg/kg)>Pb (4.38-9.65mg/kg)>Cu (1.80-17.68mg/kg)>Cd (0.241-0.764mg/kg)>Hg (0.007-0.021mg/kg). In comparison with the concentrations of heavy metals in other regions, the concentrations of Pb, Cu, and Zn in the Shuangtaizi estuary are generally low, and the Cd concentrations are close to those reported in other regions. Both the potential ecological risk index and the geoaccumulation index reveal that the heavy metal pollution in Shuangtaizi estuary is mainly dominated by Cd.
authors.affiliation: School of Environment Science and Engineering, Dalian Maritime University, 1 Linghai Road, Dalian 116026, China.
authors.forename: Chen
authors.initials: C
authors.lastname: Li
authors.affiliation: School of Environment Science and Engineering, Dalian Maritime University, 1 Linghai Road, Dalian 116026, China. Electronic address: chengwensong@dlmu.edu.cn.
authors.forename: Chengwen
authors.initials: C
authors.lastname: Song
authors.affiliation: School of Environment Science and Engineering, Dalian Maritime University, 1 Linghai Road, Dalian 116026, China.
authors.forename: Yanyan
authors.initials: Y
authors.lastname: Yin
authors.affiliation: School of Environment Science and Engineering, Dalian Maritime University, 1 Linghai Road, Dalian 116026, China.
authors.forename: Menghan
authors.initials: M
authors.lastname: Sun
authors.affiliation: School of Environment Science and Engineering, Dalian Maritime University, 1 Linghai Road, Dalian 116026, China.
authors.forename: Ping
authors.initials: P
authors.lastname: Tao
authors.affiliation: School of Environment Science and Engineering, Dalian Maritime University, 1 Linghai Road, Dalian 116026, China.
authors.forename: Mihua
authors.initials: M
authors.lastname: Shao
mesh_terms: D002681:China; D054750:Ecotoxicology / Q000379:methods; D004784:Environmental Monitoring / Q000379:methods; D063366:Estuaries; D019015:Geologic Sediments / Q000032:analysis* / Q000737:chemistry; D008628:Mercury / Q000032:analysis; D019216:Metals, Heavy / Q000032:analysis*; D018570:Risk Assessment / Q000379:methods; D013050:Spectrometry, Fluorescence; D013054:Spectrophotometry, Atomic; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D019216:Metals, Heavy; D014874:Water Pollutants, Chemical; D008628:Mercury
keywords: Ecological risk; Heavy metals; Sediment; Shuangtaizi estuary