title: Occurrence, speciation and transportation of heavy metals in 9 coastal rivers from watershed of Laizhou Bay, China.
abstract: The occurrence, speciation and transport of heavy metals in 9 coastal rivers from watershed of Laizhou Bay were investigated. The largest dissolved concentrations of Cd, Cu and Zn in water were 6.26, 2755.00, 2076.00 μg/L, respectively, much higher than several drinking water guidelines. The greatest concentrations of Cu, Zn, Cr, Ni, Pb and Cd in sediments were 1462, 1602, 196, 67.2, 63.5 and 1.41 mg/kg, dw, respectively. Correlation and principal component analysis was also conducted to determine the extent between the concentrations of metals in water and sediment, as well as relevant parameters. Throughout the river stretch, most of Cr Zn, Cr, Ni and Pb bound to residual fraction, however, Cd was preferentially bound to the exchangeable phase. Among the 9 rivers, Yellow river account for 72.5%, 67.5%, 55.4%, 59.4%, 79.4% and 85.5% for Cr, Ni, Cu, Zn. Cd and Pb, respectively. The combined potential ecological risk indexes were used to evaluate potential risks. The majority of sampling sites from watershed of Laizhou Bay have moderate ecological risk from metals. The government should pay more attention to the ecological risk of river ecosystem which flow to Laizhou Bay.
authors.affiliation: Beijing Research Center for Agricultural Standards and Testing, Beijing Academy of Agriculture & Forestry Sciences, Beijing, 100095, China; Beijing Municipal Key Laboratory of Agriculture Environment Monitoring, Beijing, 100097, China.
authors.forename: Li
authors.initials: L
authors.lastname: Xu
authors.affiliation: State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.
authors.forename: Tieyu
authors.initials: T
authors.lastname: Wang
authors.affiliation: Beijing Research Center for Agricultural Standards and Testing, Beijing Academy of Agriculture & Forestry Sciences, Beijing, 100095, China; Beijing Municipal Key Laboratory of Agriculture Environment Monitoring, Beijing, 100097, China.
authors.forename: Jihua
authors.initials: J
authors.lastname: Wang
authors.affiliation: Beijing Research Center for Agricultural Standards and Testing, Beijing Academy of Agriculture & Forestry Sciences, Beijing, 100095, China; Beijing Municipal Key Laboratory of Agriculture Environment Monitoring, Beijing, 100097, China. Electronic address: axlu2015@163.com.
authors.forename: Anxiang
authors.initials: A
authors.lastname: Lu
mesh_terms: D002681:China; D017753:Ecosystem; D004784:Environmental Monitoring; D019015:Geologic Sediments / Q000032:analysis / Q000737:chemistry*; D019216:Metals, Heavy / Q000032:analysis* / Q000737:chemistry*; D025341:Principal Component Analysis; D018570:Risk Assessment; D045483:Rivers / Q000737:chemistry*; D014186:Transportation; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D019216:Metals, Heavy; D014874:Water Pollutants, Chemical
keywords: Heavy metals; Jie river; Risk assessment; Speciation; Transportation