摘要
应用地积累指数、相关分析、聚类分析及主成分分析对湖南某典型铅锌冶炼厂周边土壤中重金属(Cd、Hg、As、Cu、pb、Cr和Zn)复合污染特征进行了研究．结果表明,Cd达到强-极严重污染,Pb和Zn为中等污染,其余为轻度-中等污染．Cd的污染频率最大,达到95．8%;其次是Pb和Zn,均是91．7%;其余大小依次是Cu(87．5%)、Hg(70．8%)、Cr(62．5%)、As(29．2%)．Cd、Hg、As、Cu、Pb和Zn的含量存在两两之间的极显著或显著相关性．地积累指数聚类分析将7种重金属分为3组:Cd、Hg-Pb-Zn、Cu-Cr-As。这3组的地积累指数逐渐减小．主成分分析中的前2个主成分能解释总信息的80．31%;第1主成分能解释63．27%的信息,主要反映Pb、Zn、Hg、Cu、As、Cd的富集程度;第2主成分主要反映Cr的富集信息．图2,表7,参8．
Geoaccumulation index, correlation analysis,clustering analysis and principle component analysis were adopted to evaluate combined pollution character of heavy metals （Cd, Hg, As, Cu, Pb, Cr, Zn ） in soils around a typical lead-zinc smeltery in Hunan province. The results of geoaccoumulation index reveal that the soils are strongly to extremely contaminated with Cd ,moderately contaminated with Pb and Zn, and slyghtly to moderately contaminated with Hg, Cu, Cr, and As. Among the seven heavy metals, Cd has the most pollution frequency （95.8%）, next are Pb and Zn with same pollution frequency （91.7%）, and the other metals pollution frequencies of Cu, Hg, Cr and As are 87.5%, 70.8, 62.5% and 29.2%, respectively. Correlation coefficient for elements except Cr attains a significant or a very significant level. The seven heavy metals are classified three group by clustering analysis, and the first group is Cd, the second group includes Hg, Pb and Zn, the third group is Cu, Cr and As. The geoaccumulation index of the first is the highest, while the third is the lowest. In principal component analysis, the first two principal components can explain 80.31% of the information, and the first one can explain 63.27% of the information in particular. The first principal component mainly reflects the enrichment of Pb, Zn, Hg, Cu, As and Cd, while the second principal component reflects the enrichment of Cr. 2figs., 7tabs., 8refs.
出处
《湖南科技大学学报（自然科学版）》
CAS
北大核心
2007年第1期111-114,共4页
Journal of Hunan University of Science And Technology：Natural Science Edition
基金
国家自然科学基金(20577008)
湖南省自然科学基金(05JJ30017)
湖南省教育厅项目(05C171)
湖南省高校青年骨干教师培养对象资助项目
关键词
铅锌冶炼厂
重金属
复合污染
地积累指数
聚类分析
主成分分析
lead-zinc smehery
heavy metal
combined pollution
geoaccumulation index
clustering analysis
principle component analysis
