欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
通过测定鄱阳湖湖区、入湖口及出湖口13个点的水体及底泥,测定其中的Zn、Cu、Pb和Cd重金属的含量水平,并运用地积累指数法对鄱阳湖底泥重金属的污染进行评价。结果表明,鄱阳湖水体中重金属含量较低,远低于国家标准,而重金属在鄱阳湖底泥中积累较严重。除部分地区Cd低于背景值外,各地区底泥Zn、Cu、Pb、Cd的含量均超过背景值,其最大含量分别为背景值的9.0、33.8、7.0、5.9倍。结合水流从入湖口-湖区-出湖口流动方向来看,水体中重金属因种类不同其分布规律存在较大差异,而底泥中不同重金属分布规律一致：湖区〉入湖口〉出湖口,可见重金属在湖区有明显的沉降作用。地积累指数方法评价表明,全湖底泥平均污染水平属偏重度污染.重金属污染呈现种类和区域的差异性,种类特征：Cu〉Pb≈Zn〉Cd;区域特征：三江口污染等级最高,污染最轻是湖口。
英文摘要：
Based on the measurment of 13 water and sediment samples from Lakeland、estuaries and Hukou of the Poyang Lake,the heavy metal concentration of Zn,Cu,Pb and Cd were analyzed,and index of Geoaccumulation was applied to evaluate heavy metal pollution of sediment in Poyang Lake.Results showed that heavy metal concentration of water was much lower than the national standard while the sediment accumulated more serious.With the exception of Cd,in some regions,the content of Cu,Zn,Pb and Cd in sediments exceed the local background value,whose maximum content values were 9.0 times,33.8 times,7.0 times and 5.9 times the local background.In the respect of water flowing direction,the distribution of different heavy metal in water body exists huge difference,while in the sediment was on the contrary：Lakelandestuaries Hukou,in which the heavy metal have a obvious precipitating action in the lakeland district was turn out.The evaluating method of findex of Geoaccumulation indicated that the heavy metal pollution in the sediment of entire lake still retain severe level.The heavy metal pollution presents the difference between the type and the region,the type characteristic：CuPb≈ZnCd;The degree of pollution in Sanjiangkou is highest,while the.district of Hukou is lightest in region characteristic.
同期刊论文项目
同项目期刊论文
期刊信息
位置：