钱塘江杭州段沉积物中铁锰的分布特征

Characteristics of Iron and Manganese in Sediment of Qiantang River,Hangzhou Section

针对钱塘江杭州段水污染现状,对钱塘江杭州段12个采样断面的沉积物进行了系统研究。结果表明,沉积物Fe、Mn的平均含量分别为2.05%,449 mg/kg,变异系数分别为16%、27%。主成分分析结果表明,Fe、Mn、K具有一定的同源性,代表沉积物的自然来源,Fe、Al的分布情况反映两者之间可能存在一定的同源性。相关性分析结果表明,Fe、Al、K均与粘粒显著或极显著相关,反映了地球化学作用和水文条件相互作用的结果;Mn与有机污染(OM)呈显著负相关,说明Mn的污染源与OM不存在同源性,相反,有机质污染导致沉积物锰含量有所降低,两者可能存在密切关系。

Due to serious water pollution in Qiantang River,Hangzhou section,characteristics of sediment from 12 main cross sections were studied.Results showed that average content of iron and manganese was 2.05% and 449 mg/kg respectively,with coefficient of variation of iron and manganese as 16% and 27%.Results by principal component analysis showed that iron,manganese and kalium were from the same source,which indicated nature source of sediment.The correlation between iron and aluminum in the sediments suggested that they were probably from the same sources.Results by element correlation analysis showed that it was extramarked significant correlation between iron,aluminum,kalium and cosmid,which reflected the results of reciprocity between geochemistry action and hydrology condition.It is significant negative correlation between manganese and organic matter（OM）,which showed that manganese and OM were not from the same source.Reversely,the content of manganese is debased by the pollution of OM,which suggested that they were probably consanguineous connection between manganese and OM in the sediment.