作　　者： ; ; ; ; (李杰）; (战明国）; (林卫东）;

机构地区： 广西大学资源与冶金学院

出　　处： 《环境保护科学》 2012年第6期14-16,59,共4页

摘　　要： 对桂林漓江3个采样点沉积柱状沉积物中主要重金属元素(Cd、Cr、Cu、Zn、Pb、As和Ni)的垂向分布进行了测定。结果表明:7种重金属元素具有相似的垂向变化特征;横向上表现为靠近市区的含量高远离,市区的含量低。地积累指数评价结果显示,远离市区的沉积柱7种金属污染程度较轻,仅有Cd和Ni属于无～中污染程度。临近市区的沉积柱形成污染的元素为Cd、Cu、Zn、Pb和As,主要集中在底层和次表层。 The vertical distributions of heavy metals （Cd , Cr , Cu , Zn , Pb , As and Ni） in the columnar sediments at 3 sampling sites in Lijiang River, Guilin City were determined. The results showed that： similar change tendency existed among 7 heavy metals in the columnar sediments. The contents of heavy metals near Guilin City were higher than that far from the city in horizontal direction. The results of index of geoaccumulation evaluation showed that the pollution of 7 kinds of heavy metals in the column sediments far from the city was hght, only Cd and Ni were in the non - middle pollution levels. Near city, the pollution elements in the sediment column were Cd, Cu, Zn, Pb and As, which mainly concentrated at the bottom and subsurface.

关 键 词： 漓江 沉积柱 重金属 分布特征 风险评价

领　　域： [环境科学与工程]