摘要
分析研究了兴化湾中部表层海水Cu、Pb、Zn、Cd、Cr、Hg、As的含量发现,表层海水中Cu、Pb、Zn、Cd、Cr、Hg、As含量均符合海水水质一类标准,对表层沉积物中Cu、Pb、Hg、Cr、Cd、As等6种重金属含量分析表明,6种重金属含量均符合海洋沉积物质量一类标准.表层海水中重金属与环境因子相关性分析表明,6种重金属与环境的相关性在不同季节中存在差异;而表层沉积物中重金属与环境因子的分析表明,重金属具有相近的来源,有机质对沉积物中重金属的含量分布具有重要影响.主成分分析结果表明,兴化湾中部表层沉积物7种重金属主要来源为有机质的降解、沉积环境本身及工业排污的影响,其贡献率分别为59.48%、15.30%、10.98%,3个主成分的贡献率合计达到85.76%.潜在生态危害指数法评价结果表明,Cu、Pb、Zn、Cd、Cr、Hg、As均属轻微生态危害.
Contents of Cu,Pb,Zn,Cd,Cr,Hg and As in the surface water and sediments of the central Xinghua Bay were analyzed. As result,the contents of Cu,Pb,Zn,Cd,Cr,Hg and As in seawater were accorded with the1 stclass of national Sea Water Quality Standard. Contents of Cu,Pb,Cd,Cr,Hg and As were accorded with 1st class of the national Marine sediment quality. Correlation analysis showed that heavy metals（ Cu,Pb,Zn,Cd,Cr,Hg and As） showed different correlations with seasonal environments,where most heavy metals in the surface sediments had similar sources. It showed that organic matter content influenced strongly the distribution of heavy metals in sediments. Principal component analysis showed that the ratio of 3 principal components were about 85. 76%.The heavy metals in sediments was mainly from the decomposition of organic matter,sedimentary environment and industrial sewage and they contributed 59. 48%,15. 30% and 10. 98% of the total variance,respectively. Potential ecological risk of heavy metals（ Cu,Pb,Zn,Cd,Cr,Hg and As） belonged to low ecological risk as results.
出处
《应用海洋学学报》
CSCD
北大核心
2016年第2期284-293,共10页
Journal of Applied Oceanography
基金
国家海洋局第三海洋研究所基本科研业务费专项资金资助项目(海三科2013007)
