鄱阳湖水系重金属出入湖通量估算

通过借鉴潮时入海通量法,对赣江、信江、饶河、抚河、修水等5大河流重金属入湖通量及重金属出湖通量进行估算,并根据鄱阳湖重金属污染的历史及现状,确定经由其他途径输入湖区的重金属通量。结果发现,不同重金属的出入湖组成不同,Cu、Zn、Cd主要是溶解态,而Pb主要以悬浮态形式存在;通过潮时入海通量法计算得出河流重金属入湖总通量低于重金属出湖通量,其中出、入湖通量比较均为Pb>Cu>Zn>Cd,对于地表径流、环湖污水排放、降雨、内源释放等重金属输入途径达到较大影响,应该加强监控,防止鄱阳湖水环境重金属污染程度的加剧。

Discussion on the flux of heavy meatals from the waters of Poyang Lake River

The paper was taken example by the flux of heavy metals(Pb、Cu、Zn、Cd) into the sea,with the consideration for the actul status of the Poyang Lake River,to estimate the flux out of the lake by the five rivers of the flux of heavy metals and heavy metals into the lake,and according to history and status of heavy metal pollution in the Poyang Lake,to determine other ways to enter the lake through the heavy metal flux.It was found that the different composition of the different heavy metals out of the lake,Cu,Zn,Cd was mainly dissolved,and Pb mainly in the suspended form;into the sea by tidal flux method when calculated total flux of the river into the lake below the heavy metal heavy metal flux out of the lake,compare with the flux into the lake are Pb> Cu> Zn> Cd,for surface runoff,lake water discharge,rainfall,and other heavy metals enter the endogenous pathway to release a greater impact,should strengthen the monitoring,Poyang Lake water to prevent the intensification of heavy metal pollution.