Copper, lead and cadmium loads and behavior in urban stormwater runoff in Curitiba, Brazil

Journal of the Brazilian Chemical Society

Ellen C. Prestes¹  Vanessa E. Dos Anjos¹  Fernando F. Sodré¹  Marco T. Grassi¹ 

[1] ,Universidade Federal do Paraná Departamento de Química Curitiba PR ,Brazil

关键词: heavy metal;    urban stormwater runoff;    pollution load;    nonpoint source;   

DOI  :  10.1590/S0103-50532006000100008

来源: SciELO

【 摘 要 】

We investigate the presence and behavior of Cu, Pb, and Cd in runoff waters from a residential area located in the city of Curitiba, Brazil. Samples were collected in twenty-one stormwater events in an intermediate traffic way located in the Bacacheri watershed. Metal concentrations were similar to range values compiled worldwide and followed the order: Pb>Cu>>Cd. Unit loads were estimated to the watershed, which cover an area of 30 km², revealing values of 1520, 950, 25 kg for Pb, Cu, and Cd, respectively. Among the three metals, lead showed the greatest affinity for the suspended solids (82%) followed by Cd (66%) and Cu (48%). Meanwhile, an association of the metals with the organic matter in the dissolved phase, following the order Cu>Pb>Cd. Metal loads and behavior in urban runoff also depends on factors such as the first flush and the dry period preceding a storm event.

【 授权许可】

CC BY   
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