夏秋季黄河口邻近海域水体中重金属变化特征  

Changes of heavy metals in the waters adjacent to the Yellow River estuary in summer and autumn

作　　者：何鑫 刘汝海[1] 苏博 王立明 张昀昌 HE Xin;LIU Ruhai;SU Bo;WANG Liming;ZHANG Yunchang(College of Environmental Science and Engineering,Ocean University of China,Qingdao,266100,China;Shandong Marine Resources and Environment Research Institute,Yantai,264000,China)

机构地区：[1]中国海洋大学环境科学与工程学院,青岛266100 [2]山东省海洋资源与环境研究院,烟台264000

出　　处：《环境化学》2022年第12期4057-4067,共11页Environmental Chemistry

基　　金：国家自然科学基金(41506128,41749903)资助.

摘　　要：2020年夏季和秋季观测了黄河口邻近海域海水中溶解态的重金属(DFe、DPb、DCu、DZn、DCd、DCr、DAs)和颗粒态金属(PFe、PPb、PCu、PZn、PCd、PCr和PAs),以探讨各重金属形态的空间和季节变化及其影响因素,研究重金属的分配系数及其来源差异.结果表明,黄河口邻近海域DFe、DPb、DCu、DZn、DCd、DCr和DAs的浓度平均值分别为45.2、7.33、2.87、18.0、0.0979、3.24、1.65μg·L^(-1),溶解态重金属高浓度点主要出现在东营港、黄河入海口以及莱州湾内部.颗粒态金属PFe、PPb、PCu、PZn、PCd、PCr和PAs的浓度平均值分别为1018、6.76、2.38、10.0、0.0195、3.38、1.01μg·L^(-1),浓度由河口附近高浓度向周围递减.颗粒态重金属与悬浮颗粒物呈显著正相关性,夏秋两季表层海水中颗粒态重金属浓度均与盐度呈负相关关系.各重金属的富集因子随悬浮颗粒物浓度的增大而减小、随盐度的增大而增大.各金属的分配系数夏季高于秋季.Cu、Zn、Pb和Cr的分配系数随着悬浮颗粒物浓度的增大而减小,Fe、As的分配系数随着盐度的增加而减小,Cu、Zn的分配系数随着盐度的增加而增加.In summer and autumn of 2020,dissolved metals(DFe,DPb,DCu,DZn,DCd,DCr,DAs),and particulate metals(PFe,PPb,PCu,PZn,PCd,PCr,PAs)in seawater of the Yellow River estuary were determined to study the spatial and seasonal changes of heavy metals forms,and their influencing factors.The distribution coefficient and sources difference of heavy metals in two seasons were analyzed.The results showed that the average concentrations of DFe,DPb,DCu,DZn,DCd,DCr and DAs in the Yellow River estuary were 45.2,7.33,2.87,18.0,0.0979,3.24,1.65μg·L^(-1) respectively.The high concentrations of dissolved heavy metals mainly appeared in Dongying Port,the Yellow River estuary and the interior of Laizhou Bay.The average concentrations of PFe,PPb,PCu,PZn,PCd,PCr and PAs were 018,6.76,2.38,10.0,0.0195,3.38,1.01μg·L^(-1) respectively,and the concentration decreased from the high concentrations near the estuary to the surrounding sea areas.There was a significant positive correlation between particulate heavy metals and suspended particulate matter.The concentration of particulate heavy metals in surface seawater in summer and autumn had a significant negative correlation with salinity.The distribution coefficient(Kd)of each heavy metal in summer was higher than that in autumn.Kd of copper,zinc,lead,and chromium decreased with the increase of the concentration of suspended particulate matter.Kd of iron and arsenic decreased with the increase of salinity,and Kd of copper and zinc increased with the increase of salinity.

关 键 词：黄河口 颗粒态重金属 溶解态重金属 季节变化 分配系数 

分 类 号：X55[环境科学与工程—环境工程]