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Analytical Letters Volume 26, 1993 - Issue 8
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Environmental Analysis

Study of the Contents and Speciation of Heavy Metals in River sediments By Factor Analysis

R. Pardo Departamento de Química Analítica, Facultad de Ciencias, Prado de la Magdalena, E-47005, Valladolid, Spain
,
E. Barrado Departamento de Química Analítica, Facultad de Ciencias, Prado de la Magdalena, E-47005, Valladolid, Spain
,
Y. Castrillejo Departamento de Química Analítica, Facultad de Ciencias, Prado de la Magdalena, E-47005, Valladolid, Spain
,
M. A. Velasco Departamento de Química Analítica, Facultad de Ciencias, Prado de la Magdalena, E-47005, Valladolid, Spain
&
M. Vega Departamento de Química Analítica, Facultad de Ciencias, Prado de la Magdalena, E-47005, Valladolid, Spain
Pages 1719-1739 | Received 16 Nov 1992, Accepted 22 Feb 1993, Published online: 23 Sep 2006
 
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Abstract

Heavy metals Zn, Cd, Pb, Cu, Ni and Co from two spanish river sediments have been determined by voltammetric techniques, along with % CaCO3 and % organic matter, and the whole data set examined by means of Factor Analysis, finding a different behaviour of the metals in each river.

Heavy metal speciation in the sediments was carried out by using the Tessier's scheme: Zn and Pb were mainly associated to ‘reducible phases’, Cd and Cu bound to ‘organic matter and sulphides’, and Ni and Co were distributed between the above fractions. The ‘residual’ metals were used as pollution indicators from the rivers, finding a similar behaviour to other industrialized river systems.

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