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Artigo Acesso aberto Produção Nacional Revisado por pares
BIBTEX RIS

Interaction between humic substances and metallic ions: a selectivity study of humic substances and their possible therapeutic application

2007; Brazilian Chemical Society; Volume: 18; Issue: 4 Linguagem: Inglês

10.1590/s0103-50532007000400023

ISSN

1678-4790

Autores

Ademir dos Santos, Wander Gustavo Botero, Iramaia Corrêa Bellin, Luciana Camargo de Oliveira, Júlio César Rocha, André Gustavo Ribeiro Mendonça, António Godinho,

Tópico(s)

Heavy metals in environment

Resumo

The complexation capacity of humic substances extracted from peat samples taken from the Mogi River in Ribeirao Preto, SP, Brazil, was determined using metal ions (Al(III), Pb(II), Cr(VI) and Cd(II)), yielding the following order of affinity: Cr(VI)< Cd(II)<Pb(II)<Al(III). An oral LD50 test showed that these humic substances are nontoxic up to a maximum concentration of 512 mg kg-1. These findings reinforce the possibility of using humic substances as a metal detoxicant.

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