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- W1982172238 abstract "Cette etude presente une methode originale d'estimation des proprietes de complexation des macromolecules organiques avec un metal. Les capacites et les constantes conditionnelles de complexation entre le cuivre et des macromolecules de type acides humiques (extraites de lixiviat de decharge d'ordures menageres) ont ete determinees. Le principe consiste a mettre en competition vis-a-vis du cuivre deux complexants, d'une part, les macromolecules de poids moleculaire eleve, d'autre part l'HEDP (acide 1-hydroxyethane-1,1'-diphosphorique) une molecule de petite taille. Les complexes HEDP-cuivre et les especes metalliques libres sont separes selectivement des complexes macromolecules-cuivre par ultrafiltration (YM 1 ; 1000 Da). Un plan d'experience a ete utilise afin de minimiser le nombre d'experiences et fournir un modele qui permet de relier la concentration totale en cuivre du filtrat aux principales variables du systeme (concentrations en macromolecules, en HEDP et pH). Les donnees experimentales sont comparees au modele theorique (etabli a partir des equilibres chimiques), ce qui permet d'estimer les capacites de complexation des macromolecules avec le cuivre." @default.
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- W1982172238 date "2000-07-01" @default.
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- W1982172238 title "Interactions between copper and organic macromolecules: determination of conditional complexation constants" @default.
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- W1982172238 doi "https://doi.org/10.1051/agro:2000148" @default.
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