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Article Dans Une Revue Desalination Année : 2010

Retention of Cu(II)- and Ni(II)-polyaminocarboxylate complexes by ultrafiltration assisted with polyamines

Résumé

The retention of Cu(II)– and Ni(II)–nitrilotriacetic acid (NTA) and ethylenediaminetetraacetic acid (EDTA) complexes in dilute solutions ([M-chelate] = 0.5 mM) by ultrafiltration in presence of polyethylenimine (PEI) or chitosan 10 mM was studied. Metal retentions larger than 98% were observed for PEI in the pH-range of 4–9. The excellent metal retention resulted from the combination of covalent binding and electrostatic interactions. The metal retention was studied at pH 7 as a function of the Cu-chelate/PEI ratio and has shown that the more encapsulating the chelate was, the lower was the retention. Electrolysis at pH 2 was used to precipitate Cu ions and to regenerate PEI with electrolytic yields in the range of 40–50% depending on the mixture composition.

Domaines

Chimie

Dates et versions

hal-00556893 , version 1 (18-01-2011)

Identifiants

Citer

D. Zamariotto, B. Lakard, P. Fievet, N. Fatin-Rouge. Retention of Cu(II)- and Ni(II)-polyaminocarboxylate complexes by ultrafiltration assisted with polyamines. Desalination, 2010, 258, pp.87-92. ⟨10.1016/j.desal.2010.03.040⟩. ⟨hal-00556893⟩
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