摘要
基于对淮河流域安徽段水系中7条河流的21个沉积物样品的实验研究,获得了Cd、Pb、Mn和Ba等4种重金属的含量数据,分析了沉积物中重金属的分布特征和赋存形态。在此基础上,应用地积累指数法综合评价了沉积物中重金属的污染状况;结果表明:研究区内水系沉积物中的Mn和Cd主要以弱酸提取态与结晶态的形式赋存,Ba主要以结晶态的形式出现,Pb主要以可还原态和结晶态的形式赋存;重金属的分布受多种因素的影响,在研究区水系沉积物中的分布存在一定规律;研究区水系沉积物中重金属污染总体较轻微,部分河段沉积物中出现了Cd和Mn的污染迹象。
Based on the experimental study of 21 sediment samples from seven rivers of the Anhui section in the Huaihe River Basin, the content of four heavy metals including Cd, Pb, Mn and Ba is obtained. By making use of the content data,the distribution characteristics and occupied state of heavy metals in the sediment are analyzed. The pollution state of heavy metals in sediment is assessed by the index of geo-aecumulation. The research results show that some heavy metals （such as Mn and Cd） existed in sediment for weak acid extraction and crystallization, and Ba for crystallization, Pb for reduction and crystallization. The distribution of heavy metals is regular to some degree and affected by some factors. The heavy metal pollution was comparatively light in sediment of the rivers of the Anhui section in the Huaihe River Basin, and Cd and Mn contamination happened in sediment of some rivers.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第3期299-304,共6页
Journal of Hefei University of Technology：Natural Science
基金
安徽省高校省级自然科学基金资助项目(kj2007b264)
关键词
淮河流域
沉积物
重金属
分布特征
赋存形态
Huaihe River Basin
sediment
heavy metal
distribution characteristic
occupied state
