title: Distribution and contamination of heavy metals in surface sediments of the Daya Bay and adjacent shelf, China.
abstract: Heavy metal (arsenic (As), cadmium (Cd), chromium (Cr), copper (Cu), mercury (Hg), lead (Pb), and zinc (Zn)) concentrations from the Daya Bay and adjacent shelf were determined to evaluate their levels and spatial distributions. The measured concentrations ranged from 1.94-13.67mg/kg for As, 0.03-0.13mg/kg for Cd, 10-85mg/kg for Cr, 1-39.5mg/kg for Cu, 0.01-0.09mg/kg for Hg, 11-56mg/kg for Pb, and 13-125mg/kg for Zn. The spatial distributions exhibited a gradual decrease from west to east, and the concentrations of the seven heavy metals met the China Marine Sediment Quality criteria. Both metal enrichment factor (EF) and geo-accumulation index (Igeo) values showed that Cd, Cr, Cu, Hg, and Zn were not at pollution levels in the region. Multivariate analysis (PCA) revealed that lithogenic factors dominated the distribution of most of the metals, whereas As and Hg were clearly influenced by anthropogenic input.
authors.affiliation: College of Marine Geo-science, Ocean University of China, Qingdao 266100, PR China; Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266061, PR China; The Key Laboratory of Coastal Wetlands Biogeosciences, China Geologic Survey, Qingdao 266071, PR China.
authors.forename: Guangming
authors.initials: G
authors.lastname: Zhao
authors.affiliation: Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266061, PR China; The Key Laboratory of Coastal Wetlands Biogeosciences, China Geologic Survey, Qingdao 266071, PR China. Electronic address: siyuanye@hotmail.com.
authors.forename: Siyuan
authors.initials: S
authors.lastname: Ye
authors.affiliation: The Key Laboratory of Coastal Wetlands Biogeosciences, China Geologic Survey, Qingdao 266071, PR China.
authors.forename: Hongming
authors.initials: H
authors.lastname: Yuan
authors.affiliation: The Key Laboratory of Coastal Wetlands Biogeosciences, China Geologic Survey, Qingdao 266071, PR China.
authors.forename: Xigui
authors.initials: X
authors.lastname: Ding
authors.affiliation: The Key Laboratory of Coastal Wetlands Biogeosciences, China Geologic Survey, Qingdao 266071, PR China.
authors.forename: Jin
authors.initials: J
authors.lastname: Wang
mesh_terms: D001151:Arsenic / Q000032:analysis; D061006:Bays; D002104:Cadmium / Q000032:analysis; D002681:China; D003300:Copper / Q000032:analysis; D004784:Environmental Monitoring / Q000379:methods*; D004787:Environmental Pollution / Q000032:analysis; D005843:Geography; D019015:Geologic Sediments / Q000032:analysis; D008628:Mercury / Q000032:analysis; D019216:Metals, Heavy / Q000032:analysis* / Q000737:chemistry; D015999:Multivariate Analysis; D025341:Principal Component Analysis; D014874:Water Pollutants, Chemical / Q000032:analysis*; D015032:Zinc / Q000032:analysis
chemical_list: D019216:Metals, Heavy; D014874:Water Pollutants, Chemical; D002104:Cadmium; D003300:Copper; D008628:Mercury; D015032:Zinc; D001151:Arsenic
keywords: Daya Bay; Heavy metals; Spatial variation; Surface sediments