舟山近岸海域沉积物中重金属分布与生态风险评估
Distribution and ecological risk assessment of heavy metals in surface sediments in Zhoushan coastal area
蔡丽萍 1金敬林 1虞丹君 2姜冰冰3
作者信息
- 1. 自然资源部宁波海洋中心,浙江 宁波 315000;舟山市海洋环境监测预报中心,浙江 舟山 316022
- 2. 舟山市生态环境保护技术中心,浙江 舟山 316022
- 3. 浙江海洋大学 水产学院,浙江 舟山 316022
- 折叠
摘要
为进一步摸清舟山近岸海域表层沉积物重金属的分布特征及污染来源基础情况,2018 年8 月对舟山近岸海域29 个表层沉积物中7 种重金属(Cu、Zn、Pb、Cd、Cr、Hg、As)分布特征进行了调查,采用正定因子矩阵(PMF)探究舟山表层沉积物重金属污染来源,并基于潜在生态风险指数法评价了重金属的污染水平及潜在生态风险程度.结果表明:① 各重金属含量的均值大小排列为Zn>Cr>Cu>Pb>As>Cd>Hg,分布大致由西往东含量逐渐降低,但部分区域存在高值区.各重金属的空间波动程度依次为Pb>Cu>Cd>Cr>Zn>As>Hg.② PMF来源解析模型分析出 3 种主要污染源,分别为交通运输活动、工业生产活动、农业生产活动.③ 各重金属的潜在生态风险系数大小排列为Cd>Hg>Cu>Pb>As>Cr>Zn,其中Cd和Hg为舟山近岸海域的主要潜在生态风险因子.舟山近岸海域沉积物重金属分布受人类活动影响显著,需要开展更全面的风险评价以保护海洋环境和生态健康.
Abstract
To gain a deeper understanding of the distribution characteristics and underlying sources of heavy metal pollution in the surface sediments in the Zhoushan coastal area,Zhejiang Province,an investigation was conducted in August 2018.The study examined the distribution of 7 heavy metals(Cu,Zn,Pb,Cd,Cr,Hg,As)across 29 surface sediment samples collected from the Zhoushan coast.The positive definite factor matrix(PFM)was employed to elucidate the origins of heavy metal contamination in the surface sediments of Zhoushan City,while the pollution levels and potential ecological risks associated with these heavy metals were assessed using the potential ecological risk index method.The findings revealed the following key points:①The average con-centrations of the heavy metals followed the order Zn>Cr>Cu>Pb>As>Cd>Hg.While the concentrations generally decreased from west to east,certain areas exhibited high values.The spatial variability of the heavy metals was ranked as follows Pb>Cu>Cd>Cr>Zn>As>Hg.② Three primary pollution sources were identified by PFM source apportionment model,which were transportation activities,industrial production activities,and agricultural production activities.③ The results of ecological risk in-dex method indicated that the potential ecological risk coefficients of the heavy metals were ranked as follows:Cd>Hg>Cu>Pb>As>Cr>Zn.Cd and Hg emerged as the predominant potential ecological risk factors in the Zhoushan coastal area.These re-sults underscore the significant influence of human activities on the distribution of heavy metals in the surface sediments of the Zhoushan coastal area,highlighting the need for more comprehensive risk assessments to safeguard marine environments and eco-logical health.
关键词
舟山近岸海域/表层沉积物/重金属/正定因子矩阵/潜在生态风险Key words
Zhoushan coastal area/surface sediments/heavy metals/positive definite factor matrix/potential ecological risk引用本文复制引用
基金项目
国家自然科学基金青年科学基金(32202935)
出版年
2024
国家科技期刊平台
NSTL
万方数据