Heavy-Metal Distribution in River Waters and Sediments around a “Firefly Village”, Shikoku, Japan: Application of Multivariate Analysis
Heavy-Metal Distribution in River Waters and Sediments around a “Firefly Village”, Shikoku, Japan: Application of Multivariate Analysis
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DOI：
10.2116/analsci.20.79
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发表时间：
2004-01
影响因子：
1.6
通讯作者：
K. Anazawa;Yasuhiko Kaida;Yoshinori Shinomura;T. Tomiyasu;H. Sakamoto
中科院分区：
文献类型：
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作者：
K. Anazawa;Yasuhiko Kaida;Yoshinori Shinomura;T. Tomiyasu;H. Sakamoto
河水和沉积物样品收集在同一地点附近的一个废弃的矿山，主要元素和重金属的浓度进行了测定。通过主成分分析（PCA）观察化学相关性，并根据PCA得分对样品进行聚类分析（CA）。主成分分析的结果从宏观上反映了协方差结构，即化学元素可分为3类：1）河水中的常量元素和重金属; 2）沉积物中的Cd、Fe和Mn; CA的结果表明，在研究区的大部分地区的化学成分的相似性，除了范围接近废弃铜矿。在矿井水与天然河水混合处，常量元素和镉表现为简单的物理混合（保守混合）。其它重金属元素（Cu、Fe、Mn和Zn）在混合事件中表现为大量降水。PCA结构主要解释在采矿水和稀释的天然河水之间的混合过程。
River water and sediment samples were collected at the same site in a vicinity of an abandoned mine, and the concentrations of major elements and heavy metals were determined. The chemical correlations were observed by principal component analysis (PCA), and the samples were classified by cluster analysis (CA) based on the PCA scores. The PCA results presented a macroscopic viewpoint of covariance structure, i.e. , the chemical elements could be classified into three groups: 1) major elements and heavy metals in the river water, 2) Cd, Fe and Mn in the sediments, and 3) Cu and Zn in the sediments. The CA results implied a similarity of chemical compositions in most parts of the study area, except the ranges close to the abandoned copper mine. At the mixing location of mining water with natural river water, major elements and cadmium showed simple physical mixing (conservative mixing). Other heavy metals (Cu, Fe, Mn and Zn) showed the massive precipitation at the mixing event. The PCA structure was mainly interpreted in terms of the mixing process between mining water and diluted natural river water.