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In situ differentiation of labile/inert metal species in Brazilian tropical rivers by means of a time-controlled batch-procedure based on TEPHA resin

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The present study deals with a new analytical procedure based on a cellulose diffusion membrane and immobilised tetraethylene-pentamine-hexaacetate chelator (DM-TEPHA) for an In situ differentiation of labile and inert metal species in aquatic systems. The DM-TEPHA system was prepared by placing TEPHA chelator in pre-purified cellulose bags and In situ applied immersing the system in two Brazilian rivers to study the relative lability of metal species (Cu, Pb, Fe, Mn and Ni) as a function of the time and the quantity of exchanger, respectively. The procedure is simple and enables a new perspective for understanding the complexation, transport, stability and lability of metal species in aquatic systems rich in organic matter.
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Keywords: aquatic organic matter; humic substances; lability, metals; water

Document Type: Research Article

Affiliations: 1: UNESP – Universidade Estadual Paulista, Departamento de Engenharia Ambiental, Sorocaba-SP, Brasil 2: UFS – Universidade Federal de Sergipe, Aracaju-SE, Brasil 3: UNESP – Centro de Estudos Ambientais, Rio Claro-SP, Brasil 4: ISAS – Institute for Analytical Sciences, D-44013Dortmund, Germany

Publication date: November 1, 2011

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