黄河口沉积物重金属含量变化特征研究

在黄河口的平水期、枯水期和丰水期采集沉积物样品。分析了铜、铅、锌、镉、铬、砷、汞浓度.结果表明,黄河口沉积物样品中的重金属含量由河到海呈现先上升后下降的趋势,平水期和枯水期Cd、Cr、As呈显著相关(0.01水平)。重金属含量为平水期>枯水期>丰水期。水文特征严重影响到沉积物中重金属的迁移。沉积物中重金属含量和沉积物的粒度密切相关.粒度越小重金属含量越高,反映了河流沉积的特征。沉积物中重金属浓度较低。各项目基本上都符合海洋沉积物质量一类标准。

STUDY ON THE VARIANCE CHARACTER OF HEAVY METALS CONTENTS IN SEDIMENTS IN YELLOW RIVER ESTUARY

In the normal,dry and flood water seasons,the sediment samples in the Yellow River estuary were collected,and the Cu,Pb,Zn,Cd,Cr,As,Hg contents in sediments were determined.The results showed that the heavy metal contents in sediments increased firstly then decreased from the river to the sea.In the normal and the dry water seasons, they were significant correlation(0.01 levels)among Cd,Cr,As.The sequence of heavy metal content was:normal water season>dry water reason>blood water season.The transfer of heavy metals was affected by hydrologic characters seriously.The contents of heavy metals in sediments were correlated with the granularity of sediment,and it reflected the sediment characters of the river.The contents of heavy metals in sediments was low,ev- cry heavy metal contents basically conformed to the first level of the sea sediment quality specification standards.