鄱阳湖五河入湖口重金属污染和分析评价

Assessment on Heavy Metal Pollution at Five Estuaries of Poyang Lake

鄱阳湖的水文状况、泥沙运移和沉积,都受赣江、抚河、信江、饶河、修水五大河流及长江的影响。本文对鄱阳湖五河口进行滩地土壤采样,测定Cu、Pb、Zn、Cd的含量,利用单因子指数和Nem erow污染指数法对各河口的重金属污染进行综合性评价分析。结果表明:各河口均受到重金属的严重污染尤其是Cu的污染,Cu单因子污染指数在饶河入湖口和乐安河口分别高达31.75,27.69。污染的地区性差异大,各采样点重金属综合污染程度排序为:饶河入湖口>乐安河入湖口>信江西支入湖口>抚河入湖口>昌江入湖口>赣江主支入湖口>修水入湖口。

Gan River, Fuhe, Xing River, Raohe, Xiushui and Yangtze River are influenceing the Poyang Lake＇s hydrology , sediment transport and deposition. Mensurating the contents of Cu,Pb,Zn, Cd in soil samples and using the Single Factor Index and the Nemerow Pollution Index to valuate the heavy metals pollution degree of Poyang Lake＇ s five estuaries. The results indicate that five estuaries have been polluted by heavy metals in serious degree, especially Cu with 31.75（Raohe） ,27.69（ Le＇ an River ）single factor index. And the pollution is different from space, the pollution degree of each sampling site is arranged in the following order： Raohe estuary 〉 Lean River estuary 〉 west branch estuary of Xing River 〉 Fuhe estuary 〉 Chang River estuary 〉 main branch estuary of Gan River 〉 Xiushui estuary.