Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/11392
Title: Multivariate statistical study of heavy metal enrichment in sediments of the Pearl River Estuary
Authors: Liu, WX
Li, XD 
Shen, ZG
Wang, DC
Wai, OWH 
Li, YS 
Keywords: Enrichment
Estuarine sediments
Heavy metals
Normalization
The Pearl River Estuary
Issue Date: 2003
Publisher: Pergamon Press
Source: Environmental pollution, 2003, v. 121, no. 3, p. 377-388 How to cite?
Journal: Environmental pollution 
Abstract: The concentrations and chemical partitioning of heavy metals in the sediment cores of the Pearl River Estuary were studied. Based on Pearson correlation coefficients and principal component analysis results, Al was selected as the concentration normalizer for Pb, while Fe was used as the normalizing element for Co, Cu, Ni and Zn. In each profile, sections with metal concentrations exceeding the upper 95% prediction interval of the linear regression model were regarded as metal enrichment layers. The heavy metal accumulation mainly occurred at sites in the western shallow water areas and east channel, which reflected the hydraulic conditions and influence from riparian anthropogenic activities. Heavy metals in the enrichment sections were evaluated by a sequential extraction method for possible chemical forms in sediments. Since the residual, Fe/Mn oxides and organic/sulfide fractions were dominant geochemical phases in the enriched sections, the bioavailability of heavy metals in sediments was generally low. The 206Pb/207Pb ratios in the metal-enriched sediment sections also revealed the influence of anthropogenic sources. The spatial distribution of cumulative heavy metals in the sediments suggested that the Zn and Cu mainly originated from point sources, while the Pb probably came from non-point sources in the estuary.
URI: http://hdl.handle.net/10397/11392
ISSN: 0269-7491
EISSN: 1873-6424
DOI: 10.1016/S0269-7491(02)00234-8
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

242
Last Week
1
Last month
2
Citations as of Sep 19, 2017

WEB OF SCIENCETM
Citations

205
Last Week
0
Last month
3
Citations as of Sep 21, 2017

Page view(s)

49
Last Week
2
Last month
Checked on Sep 18, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.