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Remoção de cromo (VI) de soluções aquosas utilizando o compósito magnético calcinado hidrotalcita-óxido de ferro: estudo cinético e de equilíbrio termodinâmico

2013; Brazilian Chemical Society; Volume: 36; Issue: 3 Linguagem: Inglês

10.1590/s0100-40422013000300012

ISSN

1678-7064

Autores

Thiago Vinícius Toledo, Carlos Roberto Bellato, Kenia Dias Pessoa, Maurício Paulo Ferreira Fontes,

Tópico(s)

Minerals Flotation and Separation Techniques

Resumo

EQUILIBRIUM STUDIES.In this work, hydrotalcite, a layered double hydroxide, had its ion exchange properties combined with the magnetic properties of iron oxide to produce a magnetic adsorbent, HT-Fe 500.These magnetic composites can be used as adsorbents for anionic contaminants in water and subsequently removed from the medium by a simple magnetic process.Removal of chromium (VI) from aqueous solutions using HT-Fe 500 was achieved using batch adsorption experiments.The adsorption capacity, calculated with the Langmuir-Freundlich model showed to be dependent on temperature, reaching values of 25.93 and 48.31 mg g -1 , respectively, for temperatures of 25 and 30 °C.Keywords: chromium (VI)

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