| 摘要: |
| 文章对2014年9月曹妃甸近岸海域表层沉积物中重金属含量及其分布进行了分析，并利用Hankanson法对其潜在生态风险进行了评价。结果显示，曹妃甸近岸海域各调查站位沉积物中重金属含量均低于一类沉积物标准限值，Cd和Pb的平均含量均超过了渤海湾重金属背景值，沉积物中重金属含量随离岸距离的增加而呈降低趋势。重金属综合潜在生态风险指数RI为9411，风险等级为中等，其中重金属潜在生态风险指数由大到小依次为Cd、Hg、Pb、Cu、Zn，除Cd以外其余重金属元素生态风险等级均为较低。重金属潜在生态风险随离岸距离的增加呈递减趋势，分析原因可能源于陆源污染。沉积物中重金属相关性分析表明：曹妃甸近岸海域沉积物中重金属元素Cd和Hg、Pb和Zn呈显著相关性，说明Cd、Hg、Pb、Zn可能具有相似来源。 |
| 关键词: 近岸海域 沉积物 重金属 潜在生态风险 陆源污染 |
| DOI： |
|
| 基金项目: |
|
| Contents and Potential Ecological Risk Assessment of Heavy Metals in the Surface Sediments of Caofeidian Sea Area |
| WANG Wei,JU Maowei,LI Depeng,SUN Qian,JIN Shuaichen,GUAN Xiaojie |
| National Marine Environment Monitoring Center |
| Abstract: |
| In this paper,the contents and distribution of heavy metals in the surface sediments from Caofeidian in September of 2014 were analyzed,and their potential ecological risk was evaluated by Hankanson method.The results showed that the contents of heavy metals in the sediment were below the first standards request of China Marine Sediment Quality,but the average contents of Cd and Pb were above the standards of background value in Bohai bay.It was also found that the contents of heavy metals decreased with the increasing of distance.Potential ecological risk assessment results showed that the comprehensive potential ecological risk index was 9411,which represented a medium ecological risk.The potential ecological risk caused by heavy metals decreased following the sequence of Cd,Hg,Pb,Cu and Zn,and all the heavy metals caused a low ecological risk except Cd.Similar to the contents of heavy metals,the potential ecological risk decreased with the increasing of distance,which might be caused by landbased pollution.Positive correlation between Cd and Hg,Pb and Zn was observed,which meant they might have a similar source. |
| Key words: Coastal area,Sediments,Heavy metals,Potential ecological risk,Land-based pollution |
