刘公岛周边海域表层沉积物重金属分布特征及潜在生态风险评价

Distribution Characteristics and Potential Ecological Risk Assessment of Heavy Metals in the Sea Area around Liugongdao Island

摘要:

本文根据刘公岛周边海域16站位沉积物样品监测数据，采用单因子污染评价法和潜在生态危害指数法，对刘公岛周边海域表层沉积物重金属质量状况进行了评价。结果表明：研究区表层沉积物中Hg、Cd、Cu、Pb、Zn含量高于我国浅海沉积物，发生一定程度富集，整体呈西北高、东南低的分布态势；第一类质量标准面积占比约55%，第二类质量标准占比约45%，无第三类质量标准海域；整体为中等生态风险区，单项生态风险指数由高至低排序为Hg＞Cd＞As＞Cu＞Pb＞Co＞Ni＞Zn＞Cr，其中Hg潜在生态危害相对较大。

Abstract:

Based on the monitoring data of sediment samples from 16 stations in the surrounding waters of Liugongdao island, by using the single factor pollution evaluation method and the potential ecological hazard index method, heavy metal quality of surface sediment in the surrounding waters of Liugongdao Island has been evaluated. It is showed that the contents of Hg, Cd, Cu, Pb and Zn in the surface sediments in the study area are higher than that in shallow sea sediments in China with a certain degree of enrichment.The overall distribution trend is high in the northwest and low in the southeast. The first type of quality standard area accounts for about 55%, the second type of quality standard area accounts for about 45%, and there is no third type of quality standard sea area. The overall area is a medium ecological risk area, and the ranking of individual ecological risk indices from high to low is Hg>Cd>As>Cu>Pb>Co>Ni>Zn>Cr. Hg has a relatively high potential ecological hazard.