Enrichment, availability and contamination of trace metals (Cd, Cu, Pb and Zn) in sediments of urban lagoons in Concepción, Chile

Química Nova

Universidad de Concepción, Concepción, Chile¹  Ahumada Bermúdez, Ramón¹  Medina Pedreros, Valentina¹  González Sepúlveda, Elizabeth¹  Neira Hinojosa, José¹  Universidad Católica de la Santísima Concepción, Concepción, Chile¹  Retamal Cifuentes, María¹ 

关键词: availability;    sediments;    metals.;   

DOI  :  10.1590/S0100-40422009000400014

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

Trace metals (Cd, Cu, Pb and Zn) enrichment, availability and contamination in superficial sediments of three interconnected urban lagoons localized in Concepción-Chile, were evaluated. According to the results of geochemical fracctionation analysis, Cu and Pb are rather associated with oxi-hydroxides, Cd is associated with exchangeable and carbonates fraction, while Zn is mainly associated with organic, oxi-hydroxides and residual fraction. The estimation of the availability percentages indicate that Cu is the most mobile metal and the less mobile is the Cd. An evaluation of the geo-accumulation index and urban industrial pollution allowed to classify the studied zone as moderately to highly contaminated.

【 授权许可】

Unknown