珠江口桂山岛表层沉积物中重金属的分布特征及潜在生态危害评价

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Abstract

Concentrations of heavy metals in surface sediment collected from twelve stations along Guishan Island, the Pearl River Estuary in August were determined. The results indicated that the pollution of heavy metals was at the middle level, and the mean contents of Pb, Cr, Ni, Cu, Zn, Mn, Fe and Ca were 40.06, 31.29, 14.17, 30.67, 100.18, 599.76, 24728.10 and 18677.36 mg/kg, respectively. Accumulating coefficients and potential ecological risk index showed that the sequence of accumulating coefficients of six heavy metals in surface sediment of Guishan Island was Cu﹥Pb﹥Zn﹥Mn﹥Cr﹥Ni, and the coefficients of Cu, Pb, Zn and Mn were higher than 1. The degree of potential ecological risk of heavy metals in this sea area presented a low level, and spatially the most serious one was at station S11. Principal component analysis (PCA) was applied to estimate the sources of heavy metal contamination. Results suggested that the first two components accounted for 44.38% and 42.61% of the total variance, respectively, indicating that industrial and domestic wastewater and erosion of rocks were the main sources of heavy metal contamination.

Key words： heavy metals potential ecological risk sediments principal component analysis Guishan Island

Received: 25 February 2013

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	LUAN Lei-lei
	GU Yang-guang
	WANG Qing
	WU Zhi-hui
	YANG Yu-feng

Cite this article:

LUAN Lei-lei,GU Yang-guang,WANG Qing, et al. Spatial distribution and potential Ecological Risk Assessment of Heavy Metals in the Surface Sediments of Guishan Island, Pearl River Estuary[J]. , 2013, 32(1): 14-21.

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http://www.ecolsci.com/EN/ OR http://www.ecolsci.com/EN/Y2013/V32/I1/14

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