Competitive transfer of H+ and Al(III) ions facilitated by a Prometrine herbicide through a liquid / liquid interface

A.V. JUÀREZ; L.M. YUDI

ELECTROCHIMICA ACTA

Elsevier

Año: 2008 vol. 54 p. 530 - 534

0013-4686

The transfer of aluminium(III) across the water/1,2-dichloroethane interface facilitated by the herbicide Prometrine (PROM) was investigated using cyclic voltammetry. In the presence of PROM in the organic phase, the transfer of Al(III) and H+ from the aqueous to the organic phase was observed and the competition between these two cations for the herbicide was analyzed at different pH values. At pH 4.50, it was possible to determine the formation of an Al(III):PROMcomplex in the organic phase, with a stoichiometry of 1:3 and a charge of 2+, indicating that the species in the complex with PROM is Al(OH)2+.+ from the aqueous to the organic phase was observed and the competition between these two cations for the herbicide was analyzed at different pH values. At pH 4.50, it was possible to determine the formation of an Al(III):PROMcomplex in the organic phase, with a stoichiometry of 1:3 and a charge of 2+, indicating that the species in the complex with PROM is Al(OH)2+.+, indicating that the species in the complex with PROM is Al(OH)2+.