胶州湾沉积物重金属分布特征及生态风险评价

发布时间：2018-11-29 13:10

【摘要】：为探明胶州湾沉积物重金属的时空分布特征、关键影响因素及生态风险,分别于2015年4个季节调查采集了胶州湾表层沉积物样品,测定了As、Cd、Cr、Cu、Ni、Pb和Zn 7种重金属质量比。通过多元回归分析确定了影响重金属分布的主要因素,并采用潜在生态危害指数法(potential ecological risk index,PERI)与沉积物质量基准法(sediment quality guidelines,SQGs)结合法对7种重金属生态风险进行评价。结果表明,胶州湾表层沉积物中重金属高值区主要出现在海泊河和李村河口等东部河口附近。多元回归分析结果表明,Cu和Ni人为输入影响较大,As、Cr和Zn主要受沉积物理化性质控制,Cd和Pb人为输入与沉积物理化性质影响作用相当。风险评估结果显示,Cd、Cr、Cu和Ni是胶州湾污染较为严重的重金属。
[Abstract]:In order to find out the spatial and temporal distribution of heavy metals in Jiaozhou Bay sediment, key influencing factors and ecological risk, surface sediment samples of Jiaozhou Bay were collected in four seasons in 2015, and As,Cd,Cr,Cu,Ni, was determined. The mass ratio of 7 heavy metals in Pb and Zn. The main factors affecting the distribution of heavy metals were determined by multiple regression analysis, and the potential ecological hazard index (potential ecological risk index,PERI) and sediment quality benchmark method (sediment quality guidelines,) were used. SQGs) method was used to evaluate the ecological risk of seven heavy metals. The results show that the high value of heavy metals in the surface sediments of Jiaozhou Bay mainly occurs near the eastern estuaries such as Haipohe River and Licun estuary. The results of multiple regression analysis showed that Cu and Ni had a great influence on artificial input, As,Cr and Zn were mainly controlled by the physical and chemical properties of sediments, and Cd and Pb had the same effect on physical and chemical properties of sediments. The results of risk assessment showed that Cd,Cr,Cu and Ni were the most serious heavy metals in Jiaozhou Bay.
【作者单位】：中国海洋大学海洋化学理论与工程技术教育部重点实验室;中国海洋大学化学化工学院;中国海洋大学环境科学与工程学院;
【基金】：高等学校博士学科点专项科研基金资助项目(20130132120009) 山东省科技发展计划项目(2014GHY115012) 中央高校基本科研业务费专项基金资助项目(201413025)
【分类号】：X55;X826

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