大公岛海域水体重金属和砷含量水平及其环境关联

doi:10.16378/j.cnki.1003-1111.25116

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Abstract In order to investigate the distribution characteristics of heavy metals in a typical coastal environment and their correlation with environmental factors, temperature, salinity, pH, and concentrations of dissolved oxygen (DO), nutrients, and heavy metals including copper (Cu), zinc (Zn), lead (Pb), cadmium (Cd), mercury (Hg), and arsenic (As) were measured in surface (0.2 m below sea level) and bottom (1.5 m from the seabed) seawater samples at six sites in the Dagong Island area near the coast of the northern Yellow Sea in China during four surveys in May (spring), and October (autumn) in 2023, and May (spring), and August (summer) in 2024. Results showed that there were significant seasonal variations in temperature, salinity, pH, and DO concentration in both surface and bottom waters, with notable fluctuations in concentrations of Cu, Zn, Pb, Cd, Hg, and As across seasons and water layers, and with consistent decreasing trend of Cu and Zn concentrations, and oscillatory variations of concentrations of Pb, Cd, and As, and relatively stable concentration of Hg. The peaks of most heavy metal concentrations were observed in spring and the minimal levels in summer, with higher concentrations in surface water than those in bottom waters. However, all heavy metal values were shown to be below the Class Ⅰ seawater quality standards. Pearson and Mantel tests revealed that salinity significantly influenced the heavy metal pollution index, while temperature and pH exhibited to some extent correlation with different heavy metals. The dynamic variations in heavy metal concentrations in the seawater of Dagong Island area and their associations with key environmental factors including salinity, DO, and eutrophication indices were elucidated in this study. These findings provide fundamental data for assessing the marine fishery environment and its trends in the North Yellow Sea coastal region.

Key words： heavy metal and As Dagong Island seawater content coastal area of Yellow Sea

Received: 13 May 2025

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	Articles by authors
	CAO Zhihai
	LI Zhixiang
	WANG Youyan
	LU Feng
	SUI Qi
	CUI Zhengguo
	QU Keming
	ZHAO Jun
	ZHANG Xuzhi

Cite this article:

CAO Zhihai,LI Zhixiang,WANG Youyan, et al. Heavy Metal Concentrations and Relationship between the Heavy Metal Concentrations and Environmental Factors in the Seawater of Dagong Island Area[J]. Fisheries Science, 2026, 45(1): 1-13.

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https://www.shchkx.com/EN/10.16378/j.cnki.1003-1111.25116 OR https://www.shchkx.com/EN/Y2026/V45/I1/1

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