title: Distribution and geochemical speciation of heavy metals in sediments from coastal area suffered rapid urbanization, a case study of Shantou Bay, China.
abstract: Eight metals in sediment samples at 15 sites from the Shantou Bay were analyzed with BCR sequential extraction protocol to obtain the metal distribution patterns in the bay. The results showed that the heavy metal pollutions in upper bay were more severe than in middle and down reaches of the bay. Both total and non-residual fractions of metals with a exception of Mn showed a seaward decrease trend. More than 54% of the total concentrations of Cd, Mn and Zn existed in the acid soluble fraction. Ni, Co, Cr and Fe mainly (more than 51%) occurred in the residual fraction. While Pb and Cu dominantly presented in the reducible (50%) and oxidable (33%) fraction respectively. Principal component analysis (PCA) revealed that the heavy metals in the non-residual fractions resulted from largely anthropogenic sources, including river input, city runoff and port discharge. These contributing sources are highlighted by cluster analysis.
authors.affiliation: Institute of Hydrobiology, Jinan University, Huangpu Street 601, Guangzhou 510632, PR China. qym77@163.com
authors.forename: Yongmin
authors.initials: Y
authors.lastname: Qiao
authors.forename: Yang
authors.initials: Y
authors.lastname: Yang
authors.forename: Jiguang
authors.initials: J
authors.lastname: Gu
authors.forename: Jiangang
authors.initials: J
authors.lastname: Zhao
mesh_terms: D061006:Bays / Q000737:chemistry; D002681:China; D004784:Environmental Monitoring; D019015:Geologic Sediments / Q000737:chemistry*; D019216:Metals, Heavy / Q000032:analysis*; D025341:Principal Component Analysis; D014507:Urbanization; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014877:Water Pollution, Chemical / Q000706:statistics & numerical data
chemical_list: D019216:Metals, Heavy; D014874:Water Pollutants, Chemical