title: Fractionation of heavy metals in shallow marine sediments from Jinzhou Bay, China.
abstract: This work investigated the distribution and speciation of Cd, Cu, Pb, Fe and Mn in the shallow sediments of Jinzhou Bay, Northeast China, which has been heavily contaminated by nonferrous smelting activities. The concentrations of Cd, Cu and Pb in sediments were found to be 100, 13 and 7 times, respectively, being higher than the national guideline (GB 18668-2002). Sequential extraction test showed that 39%-61% of Cd were exchangeable fractions, indicating that Cd in the sediments posed a high risk to local environments. While Cu and Pb were at moderate risk levels: According to the relationships between percentage of metal speciation and total metal concentration, it was concluded that the distributions of Cd, Cu and Pb in some geochemical fractions were dynamic in the process of pollutants migration and the stability of metals in sediments of Jinzhou Bay decreased in the order of Pb > Cu > Cd.
authors.affiliation: Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China. wangshaofeng@iae.ac.cn
authors.forename: Shaofeng
authors.initials: S
authors.lastname: Wang
authors.forename: Yongfeng
authors.initials: Y
authors.lastname: Jia
authors.forename: Shuying
authors.initials: S
authors.lastname: Wang
authors.forename: Xin
authors.initials: X
authors.lastname: Wang
authors.forename: He
authors.initials: H
authors.lastname: Wang
authors.forename: Zhixi
authors.initials: Z
authors.lastname: Zhao
authors.forename: Bingzhu
authors.initials: B
authors.lastname: Liu
mesh_terms: D002498:Centrifugation / Q000379:methods; D005591:Chemical Fractionation / Q000379:methods*; D002681:China; D019015:Geologic Sediments / Q000737:chemistry*; D019216:Metals, Heavy / Q000302:isolation & purification*
chemical_list: D019216:Metals, Heavy