Multivariati study of urban soils of Teresina city

Química Nova

Universidade Federal do Piauí, Teresina, Brasil¹  Moura, Márcio Cleto Soares de¹  Lopes, Ana Nídia Cunha¹  Moita, Graziella Ciaramella¹  Moita Neto, José Machado¹ 

关键词: soil;    heavy metals;    multivariate analysis.;   

DOI  :  10.1590/S0100-40422006000300005

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The concentrations of Cu, Pb, Zn, Cr, Ni, Al, Mn and Fe were measured by atomic absorption spectrometry, of 19 topsoil samples collected in the Teresina city urban area to discriminate natural and anthropic contributions and identify possible sources of pollution. The average concentrations of Cu, Zn, Pb and Cr of the urban soils were 6.11, 8.56, 32.12 and 7,17 mg/kg-1, respectively. Statistical analysis techniques, such as principal component analysis (PCA) and hierarchical cluster analysis (HCA), were used to analyze the data. Mn, Ni and Cr levels were interpreted as natural contributions, whereas Pb, Zn and, in part, Cu were accounted for mainly by anthropic activities. High Pb levels were observed in the ancient avenues.

【 授权许可】

Unknown