Fractionation of heavy metals in different particle-size sediments and its relationship with heavy metal pollution

Wang, S.X.; Zhang, S.Z.; Shan, X.Q.

Bulletin of Environmental Contamination and Toxicology 71(5): 873-880

2003


ISSN/ISBN: 0007-4861
PMID: 14705645
DOI: 10.1007/s00128-003-0223-x
Accession: 004168214

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Abstract
A study was conducted to evaluate, for the first time, the relationship of heavy metals (Cr, Ni, Zn, Cu, Cd and Pb) pollution in sediments with fraction distribution among the particle-size spectrum. Sediments were collected from the Guanting Reservoir, Beijing, China, in October 2000. In both B1 fraction (water soluble, exchangeable and carbonate bound) and B3 fraction (organic matter and sulfide bound), the distribution of heavy metals among the particle-size spectrum was associated with the heavy metal pollution in sediments. The distribution of the heavy metals Cr, Cu and Ni in B1 and B3 fractions displayed similar fractionation patterns among particle size in all sediments, characterized as hosted largely by the fraction <2 micro m. However, Pb, Zn and Cd in polluted sediments were distributed in a different pattern from the other metals or the same elements in unpolluted samples with a maximum concentration found in the particle size 20-63 micro m. The heavy metals in the B2 fraction were evenly distributed among different particle size for all the metals except Pb. The fractionation patterns in particle size fractions exerted some relationship with the pollution of heavy metals in sediments.

Fractionation of heavy metals in different particle-size sediments and its relationship with heavy metal pollution