摘要
利用2016年荣成爱莲湾邻近海域表层沉积物7种重金属含量的调查资料,分析了重金属含量和空间分布以及基于Hkanson指数的潜在生态风险。结果表明:研究海域表层沉积物中各重金属的含量均符合第一类沉积物质量标准,沉积物质量状况良好,Cu、Pb、Zn、Cr、Cd和As的空间分布较为均匀,Hg的空间分布差异较大;潜在生态风险指数表明,研究海域沉积物重金属综合生态风险程度为中等,各重金属的潜在生态风险由高到低依次为Cd>Hg>As>Pb>Cu>Cr>Zn,所有的站位Cd为中潜在生态风险,50%的站位Hg为中潜在生态风险,Cd和Hg为主要潜在生态风险因子。应加强该海域沉积物中Cd和Hg含量的监测,重点关注Cd高值区的潜在生态风险。
With field observation data of seven heavy metals in surface sediments of adjacent waters of Ailian Bay in2016,contents,spatial distribution as well as potential ecological risks,based on Hkanson's index,of the heavy metals were analyzed successively.The results showed that the studied areas were in rather good state of sedimentation,whose heavy metal contents in surface sediments complied with the quality standards for Grade I marine sediment according to Marine Sediment Quality of China(GB18668-2002).Spatial distribution of Cu,Pb,Zn,Cr,Cd and As was relatively uniform,while there were a great many variances in Hg's distribution.Assessment results of potential ecological risk index revealed that the comprehensive potential ecological risk of heavy metals in the studied areas was moderate,in descending order of Cd>Hg>As>Pb>Cu>Cr>Zn.Cadmium and mercury were determined as the principal ecological risk factors,as their potential ecological risks were moderate(Cadmium's risk in all the8sampling stations,and mercury's in half ones).Therefore,close watch out and stringent control shall be taken to prevent cadmium and mercury pollutions,and special attentions shall be paid to potential ecological risk to high value areas of cadmium in adjacent waters of the Ailian Bay.
出处
《科学技术与工程》
北大核心
2017年第36期139-144,共6页
Science Technology and Engineering
基金
山东省现代农业产业技术体系建设专项资金(SDAIT-26-06)
国家海洋局海域管理技术重点实验室基金(201608)
海洋公益性行业科研专项经费(201205001)资助
关键词
重金属
沉积物
生态风险评价
爱莲湾
heavy metals
sediments
ecological risk assessment
Ailian Bay
