Distribution variation of heavy metals in maricultural sediments and their enrichment, ecological risk and possible source-A case study from Zhelin bay in Southern China.
The study characterized the enrichment, ecological risk and possible source of heavy metals (As, Cd, Cr, Cu, Hg, Ni, Pb and Zn) in sediments from a typical mariculture bay. The concentrations of the metals were analyzed in sediments collected from Zhelin bay. The distribution variation was examined during the past decade, which had an increase tendency till 2011. The enrichment factor and geoaccumulation indices suggested Pb, As, Cu and Zn were minor enrichment and unpolluted to moderately polluted, and Ni at cage mariculture area was moderately-severe enrichment and strongly polluted. This area had medium to high ecological risk, especially at the northwest coastal area of semi-closed bay, with high-medium to high ecological risk. Correlation and principal component analyses indicated that most of heavy metals, especially for As, Pb and Ni, primarily resulted from the combustion of gasoline and diesel fuel and the ship protective layer.
College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou 730050, PR China.
Yi
Y
Wang
College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou 730050, PR China; Guangdong Provincial Public Laboratory of Analysis and Testing Technology, China National Analytical Center (Guangzhou), Guangzhou 510070, PR China.
Yaning
Y
Wei
Guangdong Provincial Public Laboratory of Analysis and Testing Technology, China National Analytical Center (Guangzhou), Guangzhou 510070, PR China. Electronic address: guopengran@fenxi.com.cn.
Pengran
P
Guo
Guangdong Provincial Public Laboratory of Analysis and Testing Technology, China National Analytical Center (Guangzhou), Guangzhou 510070, PR China.
Jiachuan
J
Pan
Key Laboratory of Water Quality Safety and Protection in Pearl River Delta <Ministry of Education>, Guangzhou University, Guangzhou 510006, PR China.
Qihang
Q
Wu
Guangdong Provincial Public Laboratory of Analysis and Testing Technology, China National Analytical Center (Guangzhou), Guangzhou 510070, PR China.
Ning
N
Liu
D061006:Bays / Q000737:chemistry*; D002681:China; D004463:Ecology; D004784:Environmental Monitoring / Q000379:methods*; D019015:Geologic Sediments / Q000032:analysis / Q000737:chemistry*; D019216:Metals, Heavy / Q000032:analysis*; D025341:Principal Component Analysis; D018570:Risk Assessment; D014874:Water Pollutants, Chemical / Q000032:analysis*
D019216:Metals, Heavy; D014874:Water Pollutants, Chemical
Ecological risk; Enrichment; Heavy metals; Maricultural sediments; Possible sources