摘要
桑沟湾海域是我国重要的半封闭海湾规模化海水养殖示范区,重金属是一类具有严重危害的污染物,因此,探明桑沟湾表层海水中重金属污染状况和季节变化规律,对该区域的海水养殖活动和生态环境保护具有重要的参考意义。本研究在桑沟湾海域布设21个调查站位,分别于2019年春季(4月)、夏季(7月)、秋季(10月)、冬季(12月)采集表层海水,调查Cu、Zn、Pb、Cd 4种重金属的含量,并分析了其季节变化规律、分布特征和污染程度。结果显示,4种重金属的含量范围(μg/L)分别为Cu(1.14~2.88)、Zn(4.62~6.53)、Pb(0.38~1.55)、Cd(0.18~0.92),大致呈自西向东先递增后递减的趋势,污染程度依次为Zn<Cu<Cd<Pb,并表现出一定的季节和养殖分区差异,其中夏季和贝藻混养区相对较高。与国内其他养殖区相比,桑沟湾表层海水中重金属含量较低,整体上处于清洁水平,符合国家一类海水水质标准,适宜水产养殖。
Sanggou bay is an important semi closed demonstration zone of large-scale mariculture in China.Heavy metals are a kind of pollutants,which are highly toxic to environment and organisms.It is,therefore,highly essential and urgent to investigate the pollution status and seasonal variation of heavy metals in the surface seawater of Sanggou bay.It will make great contribution to mariculture activities and be ecologically important for the preservation of marine ecosystem in Sanggou bay.In this study,we thus collected surface seawater of 21 stations in spring(April),summer(July),autumn(October)and winter(December)in 2019,respectively.We then determined the concentrations of Cu,Zn,Pb and Cd in the surface seawater,and analyzed subsequently their seasonal variation,distribution characteristics and pollution degree.The results showed that the concentrations of Cu,Zn,Pb,Cd were in the range of 1.14~2.88μg/L,4.62~6.53μg/L,0.38~1.55μg/L and 0.18~0.92μg/L,respectively.Generally,the concentration of the four heavy metals appeared to increase and then decrease from west to east of Sanggou bay.Single factor pollution indices showed that the order of the pollution degree of the four heavy metals was Zn<Cu<Cd<Pb.There were also seasonal variation and culture area differences of heavy metals concentration and pollution degree,leading to the higher level of the four heavy metals in summer and shellfish algae mixed culture area.However,the concentration and pollution degree of the four heavy metals in the surface seawater of Sanggou bay is approximately equal to and/or even much lower than those of many other mariculture areas in China.Overall,the level of the four heavy metals in the surface seawater of Sanggou bay is in the clean level and in line with the national first-class seawater quality standards.We therefore conclude that the seawater quality of Sanggou bay is very suitable for mariculture.
作者
孙业皎
黄翠玲
隋琪
娄安刚
夏斌
张旭志
赵信国
陈碧鹃
曲克明
SUN Ye-jiao;HUANG Cui-ling;SUI Qi;LOU An-gang;XIA Bin;ZHANG Xu-zhi;ZHAO Xin-guo;CHEN Bi-juan;QU Ke-ming(College of Environmental Science and Engineering,Ocean University of China,Qingdao 266003,China;Yellow Sea Fisheries Research Institute,Chinese Academy of Fishery Sciences,Key Laboratory of Sustainable Development of Marine Fisheries,Ministry of Agriculture and Rural Affairs,Key Laboratory of Fishery Resources and Ecological Environment in Shandong Province,Qingdao 266071,China;Marine Ecology and Environmental Science Laboratory,Pilot National Laboratory for Marine Science and Technology(Qingdao),Qingdao 266071,China;SGS-CSTC Standards Technical Services Co.,Ltd.Qingdao Branch,Qingdao 266101,China)
出处
《海洋环境科学》
CAS
CSCD
北大核心
2021年第5期752-759,共8页
Marine Environmental Science
基金
中国水产科学研究院基本科研业务费资助项目(2020TD12)
国家重点研发计划“蓝色粮仓科技创新”重点专项项目(2018YFD0900703)。
关键词
桑沟湾
养殖区
重金属
含量变化
分布特征
污染程度
Sanggou bay
aquaculture area
heavy metals
content changes
distribution characteristics
pollution degree
