Pollution characteristics and source analysis of heavy metals in a sediment core of Beiji island in Wenzhou

doi:10.16178/j.issn.0528-9017.20230702

Abstract

Abstract:

In December 2022, a sediment core sample was obtained from the Beiji area of Wenzhou and analyzed for the presence of five heavy metals, namely copper (Cu), lead (Pb), cadmium (Cd), zinc (Zn) and chromium (Cr), across different sediment layers ranging from 0 to 40 cm. Enrichment factors (EF) were calculated to ascertain the extent of metal concentration in the samples. Results revealed that the concentrations and EF values of most heavy metals peaked or showed a high value area at around 30 cm in the subsurface layer. This observation can be attributed to the high-intensity anthropogenic emissions of heavy metals around Beiji Island during the 1980s and 1990s. Pearson correlation analysis was carried out to explore the factors that control the vertical distribution of heavy metals in sediments of Beiji Island. The results showed that the key controlling factors of the five heavy metals varied. The results found that the key controlling factors for the five heavy metals varied. The inputs of Cu, Pb, Zn, and Cr were mainly influenced by human activities, whereas the source of the heavy metal Cd was not related to anthropogenic activities.

Key words: heavy metal, Beiji Island, sediment core, source analysis

CLC Number:

CHEN Xingxing, LU Rongmao, LIU Weicheng, ZHOU Chaosheng. Pollution characteristics and source analysis of heavy metals in a sediment core of Beiji island in Wenzhou[J]. Journal of Zhejiang Agricultural Sciences, 2024, 65(11): 2758-2764.

Figures/Tables 5

References 27

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站位点	Cu	Pb	Cd	Zn	Cr
本研究区域	30.83	28.49	0.120	97.83	116.77
平阳(温州)	38.12	24.68	0.078	131.16	108.68
渤海	16.10	19.40	0.100	50.00	48.80
黄海	21.40	23.30		77.90	72.30
南海	17.68	26.50	0.110	55.70	35.00

站位点	Cu	Pb	Cd	Zn	Cr
本研究区域	30.83	28.49	0.120	97.83	116.77
平阳(温州)	38.12	24.68	0.078	131.16	108.68
渤海	16.10	19.40	0.100	50.00	48.80
黄海	21.40	23.30		77.90	72.30
南海	17.68	26.50	0.110	55.70	35.00

项目	PC1	PC2
Cu	0.986	0.047
Pb	0.980	0.150
Cd	0.080	0.988
Zn	0.910	-0.063
Cr	0.876	0.323
特征值	3.632	1.010
方差贡献率/%	72.649	20.206
累计方差贡献率/%	72.649	92.854

项目	PC1	PC2
Cu	0.986	0.047
Pb	0.980	0.150
Cd	0.080	0.988
Zn	0.910	-0.063
Cr	0.876	0.323
特征值	3.632	1.010
方差贡献率/%	72.649	20.206
累计方差贡献率/%	72.649	92.854