庙岛群岛南部海域海水和表层沉积物重金属分布特征及生态风险评价
发布时间：2018-08-16 08:47
【摘要】：基于2014年4月庙岛群岛南部海域的调查资料,综合运用单因子指数法、地质累积指数法和潜在生态风险指数法3种方法,研究了海水和表层沉积物重金属元素的含量分布特征,并对重金属元素进行了污染评价和生态风险分析。结果表明:调查海域海水中Zn、Hg、Cu和Cd均符合第一类或第二类海水水质标准,15%站位的Pb超第二类海水水质标准;表层沉积物中7种重金属均符合第一类沉积物质量标准,沉积物质量良好;地质累积指数评价结果表明沉积物中重金属污染程度由高到低为ZnAsPbCrCuCdHg,Hg均处于清洁状态,As、Pb、Cr、Cu、Cd均有部分站位呈轻度污染状态;潜在生态风险指数表明沉积物中重金属综合潜在生态风险程度为中,7种重金属潜在生态风险由高到低为CdHgAsPbCuZnCr,Cd和Hg为调查海域沉积物重金属主要潜在生态风险因子;Pearson相关分析结果表明Zn、Cr、Hg、Cu、Pb、As之间呈显著相关(P0.01),具有相似的来源特征。庙岛群岛南部海域重金属的来源主要包括黄河入海泥沙悬浮物输送、周边沿岸入海径流输入、港口码头船舶引入和大气沉降输入等。应加强对庙岛群岛南部海域海水中Pb及表层沉积物中Cd和Hg的监测,重点关注沉积物中Cd和Hg相对高值区的潜在生态风险。
[Abstract]:Based on the investigation data in the southern waters of Miaodao Islands in April 2014, the contents and distribution characteristics of heavy metals in seawater and surface sediments were studied by using single factor index method, geological accumulation index method and potential ecological risk index method. Zn, Hg, Cu and CD in the investigated seawater all conform to the first or second class seawater quality standards, 15% of the stations meet the second class seawater quality standards; 7 heavy metals in the surface sediments all conform to the first class sediment quality standards, and the quality of the sediments is good; the evaluation results of geological accumulation index show that the pollution degree of heavy metals in the sediments is from high to high. As, Pb, Cr, Cu and Cd were slightly polluted. The potential ecological risk index showed that the comprehensive potential ecological risk of heavy metals in sediments was moderate, and the potential ecological risk of seven heavy metals was CdHgAsPbCuZnCr from high to low, and Cd and Hg were the main potential heavy metals in the sediments of the investigated sea area. The results of Pearson correlation analysis showed that Zn, Cr, Hg, Cu, Pb and As were significantly correlated with each other (P 0.01) and had similar source characteristics. To strengthen the monitoring of Cd and Hg in seawater and surface sediments in the southern waters of Miaodao Islands, the potential ecological risks in the relatively high values of Cd and Hg in sediments should be paid more attention.
【作者单位】： 山东省海洋资源与环境研究院山东省海洋生态修复重点实验室;中国海洋大学环境科学与工程学院;
【基金】：国家海洋公益性行业专项经费项目(201105006;201205001) 山东省软科学研究计划项目(2014RKB12003)资助
【分类号】：X826;X55
本文编号：2185487
[Abstract]:Based on the investigation data in the southern waters of Miaodao Islands in April 2014, the contents and distribution characteristics of heavy metals in seawater and surface sediments were studied by using single factor index method, geological accumulation index method and potential ecological risk index method. Zn, Hg, Cu and CD in the investigated seawater all conform to the first or second class seawater quality standards, 15% of the stations meet the second class seawater quality standards; 7 heavy metals in the surface sediments all conform to the first class sediment quality standards, and the quality of the sediments is good; the evaluation results of geological accumulation index show that the pollution degree of heavy metals in the sediments is from high to high. As, Pb, Cr, Cu and Cd were slightly polluted. The potential ecological risk index showed that the comprehensive potential ecological risk of heavy metals in sediments was moderate, and the potential ecological risk of seven heavy metals was CdHgAsPbCuZnCr from high to low, and Cd and Hg were the main potential heavy metals in the sediments of the investigated sea area. The results of Pearson correlation analysis showed that Zn, Cr, Hg, Cu, Pb and As were significantly correlated with each other (P 0.01) and had similar source characteristics. To strengthen the monitoring of Cd and Hg in seawater and surface sediments in the southern waters of Miaodao Islands, the potential ecological risks in the relatively high values of Cd and Hg in sediments should be paid more attention.
【作者单位】： 山东省海洋资源与环境研究院山东省海洋生态修复重点实验室;中国海洋大学环境科学与工程学院;
【基金】：国家海洋公益性行业专项经费项目(201105006;201205001) 山东省软科学研究计划项目(2014RKB12003)资助
【分类号】：X826;X55
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