Wang,S., Cao,Z., Lan,D., Zheng,Z. and Li,G.(2008): Concentration distribution and assessment of several heavy metals in sediments of west-four Pearl River Estuary. Environ.Geol., 55, 963-975.

『珠江の西部の4河口の堆積物中のいくつかの重金属の濃度分布と評価』


Abstract
 Grain size parameters, trace metals (Co, Cu, Ni, Pb, Cr, Zn, Ba, Zr and Sr) and total organic matter (TOM) of 38 surficial sediments and a sediment core of west-four Pearl River Estuary region were analyzed. The spatial distribution and the transportation procession of the chemical element in surficial sediments were studied mainly. Multivariate statistics are used to analyses the interrelationship of metal elements, TOM and the grain size parameters. The results demonstrated that terrigenous sediment taken by the rivers are main sources of the trace metal elements and TOM, and the lithology of parent material is a dominating factor controlling the trace metal composition in the surficial sediment. In addition, the hydrodynamic condition and landform are the dominating factors controlling the large-scale distribution, while the anthropogenic input in the coastal area alters the regional distribution of heavy metal elements Co, Cu, Ni, Pb, Cr and Zn. The enrichment factor (EF) analysis was used for the differentiation of the metal source between anthropogenic and naturally occurring, and for the assessment of the anthropogenic influence, the deeper layer content of heavy metals were calculated as the background values and Zr was chosen as the reference element for Co, Cu, No, Pb, Cr and Zn. The result indicate prevalent enrichment of Co, Cu, Ni, Pb and Cr, and the contamination of Pb is most obvious, further more, the peculiar high EF value sites of Zn and Pb probably suggest point source input.

Keywords: West-four Pearl River Estuary; Surficial sediment; Heavy metals; Depositional environment; Enrichment factor (EF)』

Introduction
Materials and methods
 Setting and sampling
 Analysis methods
  Analyses of metal elements
  Analyses of total organic matter
  Analyses of grain size parameters
  Statistical analyses
Results
 Grain size
 Metal elements and organic matter
Discussion
 Grain size factors
 Hydrodynamics factors
 Chemical factors and source identification
 Anthropogenic contribution and assessment of heavy metals
Conclusions
Acknowledgments
Appendix
References


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