渤海西部河口潮间带区海水及沉积物中重金属研究  

Heavy Metal in Seawater and Sediment Investigation at Bohai Sea Western Estuary Tidal Zone

作　　者：张效龙[1,2,3] 丁德文[1,2] 徐家声[2] 刘敦武[2] 王慧艳[2] 陶常飞[2] 

机构地区：[1]大连海事大学环境与工程学院,辽宁大连116026 [2]国家海洋局第一海洋研究所,山东青岛266061 [3]华为海洋网络有限公司,天津300456

出　　处：《东华理工大学学报（自然科学版）》2010年第3期276-280,共5页Journal of East China University of Technology(Natural Science)

基　　金：国家自然科学基金资助(40572142)

摘　　要：通过对渤海湾西部永定新河河口潮间带区海水及沉积物中重金属含量及污染状况的研究,认为海水中重金属含量平均值的大小顺序为Zn>Cu>Pb>Hg>Cd;因海水中重金属输入途径的不同,不同潮期海水中重金属含量存在差异:大潮期海水中重金属Cu,Pb和Hg的含量大于小潮期海水中的含量,而重金属Zn和Cd的含量则小于小潮期海水中的含量;因受海水中悬浮物含量、种类及河口区咸淡水混合发生絮凝作用等的影响,海水中重金属含量在垂向上也存在差异。无论是大潮期还是小潮期,海水中重金属含量总是表层略大于底层;按一类水质标准对海水中重金属污染状况的分析,认为研究区海水已局部受到重金属污染,污染最严重的是重金属Zn,其次为重金属Pb,Hg和Cu,不存在重金属Cd污染;沉积物中重金属含量平均值的大小顺序与海水中的相同,说明海水与沉积物中重金属循环处于相对平衡状态。沉积物中重金属含量平均值均在渤海湾环境背景值范围内,且是渤海海域含量最低的区域。经过对沉积物重金属污染状况的分析,研究区沉积物重金属污染轻微。the heavy metal content in the seawater and seabed sediment and their contamination conditions have been investigated at the Bohai sea western estuary tidal zone. Some new conclusions are obtained. The order relation of heavy metal content average value is ZnCuPbHgCd in seawater。The heavy metal content is different in different tidal-season because of the difference of their imputing path. The Cu、Pb and Hg contents are higher in spring season than in neap season,but the Zn and Cd contents are inverse. The heavy metal content in superficial seawater is always higher than in the bottom seawater,because of affected by the suspended matter content,their types in seawater and flocculation in estuary area. According to the one class water quality standard,the seawater in the investigated zone has partly been contaminated by the heavy metal,and Zn contamination is severe,next is Pb,Hg and Cu,Cd contamination is non-existent. The order relation of heavy metal content average value in sediment is same with in seawater,which indicates heavy metal circulation between sediment and seawater is in equilibrium state. The heavy metal content average values in the investigated area is not exceeding the ambient background value in Bohai sea,and is the lowest than any areas of Bohai sea. According to the heavy metal contamination conditions analyzing,the heavy metal contamination in sediment is very little.

关 键 词：渤海湾 永定新河河口 潮间带 海水 沉积物 重金属 污染 

分 类 号：X55[环境科学与工程—环境工程]