Distribution and Accumulation Characteristics of Heavy Metals in Sediments in Southern Sea Area of Huludao City, China

查看全文 作　　者：WANG [1]Yan;LIU [1]Ruhai;FAN [2]Dejiang;YU [1]Ping;WANG [1]Jinyu;TANG [1]Aikun

机构地区：[1]Key Lab of Marine Environmental Science and Ecology,Ministry of Education,Ocean University of China;[2]College of Marine Geosciences,Ocean University of China

出　　处：《Chinese Geographical Science》索引2013年第23卷第2期,共9页

基　　金：Under the auspices of National Natural Science Foundation of China (No. 40806045);Ocean Public Welfare Scientific Research Project,State Oceanic Administration People's Republic of China (No. 201105005) 摘　　要：The southern sea area of the Huludao City, Liaoning Province might be polluted by heavy metals because it is close to the Jinzhou Bay, one of the heaviest sea area polluted by heavy metals in China. The undisturbed modern sediment core can be used to analyze the accumulation and source of the pollutants using 137 Cs and 210 Pb ex . Thirty-five samples of surface sediment and two core sediments were collected from the southern sea area of Huludao City. The concentrations of copper (Cu), lead (Pb), chrome (Cr), zinc (Zn), arsenic (As) and mercury (Hg) in the surface sediments as well as Cu, Pb, Zn, Cr, 137 Cs and 210 Pb ex in the core sediments were determined to research the spatial distribution and accumulation characteristics, and to analyze the sources and the potential risks of heavy metals. The results show that the pollution levels of Zn and Hg are serious, and 26 stations are at moderate or heavy ecological risks. The concentrations of the heavy metals increase from east to west, as well as from open sea to offshore marine area. The concentrations of heavy metals are not high in the sediments adjacent to the Jinzhou Bay, and the influence caused by the seawater exchange with the Jinzhou Bay is little. The concentrations of the heavy metals in the core sediments show low-high-low characteristic, and it coincides with the pollution history of Huludao City. The atmospheric deposition of heavy metals from the Huludao Zinc Plant is likely to be the main source of pollution without direct discharge of wastewater. The high concentrations of heavy metals appear on the upper sediment of 20 cm. The shallow sediment with high heavy metal contents might be exposed to surface when it was disturbed by the ocean engineering and big storm surge, then cause risk to the safety of aquaculture and human healthy. 关键词：海域沉积物重金属污染葫芦岛市积累特征中国南部重金属浓度表层沉积物生态风险

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Distribution and Accumulation Characteristics of Heavy Metals in Sediments in Southern Sea Area of Huludao City, China

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