论文部分内容阅读
为探明洋山港运行对周边海域的环境影响,本文对洋山港码头所在地小洋山港潮间带地区表层海水及生物体内重金属的污染程度进行深入分析与评价。结果表明,表层海水中重金属以Zn和Hg的污染为主;生物体内主要累积重金属为Cu和Zn,其中小结节滨螺体内重金属含量最高,富集系数最大,可作为小洋山码头地区海水重金属生物可利用性的指示物种;生物体内重金属形态和组织分布的结果表明,Cu、Pb、Cd和Zn以水溶态存在的比例较小,且主要存在于肌肉组织中,而As和Hg主要以不溶态的形式存在于非肌肉组织中;重金属在不同生物种类体内分布的差异显著,粗糙滨螺体内重金属以水溶态存在的比例最大,海蟑螂的重金属大多都存在于其肌肉组织中。食用僧帽牡蛎肌肉部分的日限制量(265.80g)明显高于食用其全部软组织(46.74g),且前者还与背景海水的重金属污染特征有较好的一致性,能较准确的反映海水重金属的污染程度。
In order to find out the environmental impact of Yangshan Harbor operation on the surrounding sea areas, this paper analyzes and evaluates the pollution degree of surface seawater and heavy metals in the intertidal zone of the Yangyang Harbor. The results showed that Zn and Hg were the main pollutants in the surface seawater. The major accumulations of heavy metals in the organisms were Cu and Zn. The content of heavy metals in the nodules was the highest and the enrichment coefficient was the highest. The results showed that the proportion of Cu, Pb, Cd and Zn in the water-soluble state was small, and mainly existed in the muscle tissue, whereas the contents of As and Hg in the The insoluble forms existed in non-muscle tissues. The distribution of heavy metals in different species was significantly different. The proportion of heavy metals in water-soluble state was the highest in R. rhamnoides, and most of the cockroaches were found in their muscle tissues. The daily limit (265.80g) of edible muscovy oyster muscle portion was significantly higher than that of all soft tissues (46.74g), and the former was also consistent with the heavy metal pollution characteristics of background seawater, which could more accurately reflect the heavy metal The degree of pollution.