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Silica-based 2-aminomethylpyridine functionalized adsorbent for hydrometallurgical extraction of low-grade copper ore / Xin Li in Industrial & engineering chemistry research, Vol. 51 N° 46 (Novembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 46 (Novembre 2012) . - pp. 15224–15232 Titre : Silica-based 2-aminomethylpyridine functionalized adsorbent for hydrometallurgical extraction of low-grade copper ore Type de document : texte imprimé Auteurs : Xin Li, Auteur ; Baohua Li, Auteur ; Shan Wu, Auteur Année de publication : 2013 Article en page(s) : pp. 15224–15232 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Adsorbent  Hydrometallurgical Résumé : A silica-based 2-aminomethylpyridine functionalized adsorbent was synthesized to extract copper. Characterization of the adsorbent was carried out to determine the surface morphology, specific surface area, pore size, and grafting ratio of 2-aminomethylpyridine groups. The adsorption selectivity of the adsorbent for Cu(II) ions was 1353 times higher than that for Fe(III) ions. The adsorption capacity for Cu(II) ions maintained a stable value of 0.53 mmol/g with and without perturbation of Fe(III) ions. Density functional theory (DFT) calculations revealed a mechanism of selective adsorption of copper, through the formation of 2-aminomethylpyridine-Cu(II) complexes. Semi-industrial scale experiments revealed that Cu(II) ions in the acidic leachate of low-grade copper ore could be efficiently extracted by the adsorbent even in perturbation of substantial amounts of Fe(III) and other metal ions. Based on the adsorbent, a new process for copper hydrometallurgical extraction was developed, in which the adverse environmental impacts in traditional solvent extraction processes could be avoided. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie301852r [article] Silica-based 2-aminomethylpyridine functionalized adsorbent for hydrometallurgical extraction of low-grade copper ore [texte imprimé] / Xin Li, Auteur ; Baohua Li, Auteur ; Shan Wu, Auteur . - 2013 . - pp. 15224–15232. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 46 (Novembre 2012) . - pp. 15224–15232 Mots-clés : Adsorbent  Hydrometallurgical Résumé : A silica-based 2-aminomethylpyridine functionalized adsorbent was synthesized to extract copper. Characterization of the adsorbent was carried out to determine the surface morphology, specific surface area, pore size, and grafting ratio of 2-aminomethylpyridine groups. The adsorption selectivity of the adsorbent for Cu(II) ions was 1353 times higher than that for Fe(III) ions. The adsorption capacity for Cu(II) ions maintained a stable value of 0.53 mmol/g with and without perturbation of Fe(III) ions. Density functional theory (DFT) calculations revealed a mechanism of selective adsorption of copper, through the formation of 2-aminomethylpyridine-Cu(II) complexes. Semi-industrial scale experiments revealed that Cu(II) ions in the acidic leachate of low-grade copper ore could be efficiently extracted by the adsorbent even in perturbation of substantial amounts of Fe(III) and other metal ions. Based on the adsorbent, a new process for copper hydrometallurgical extraction was developed, in which the adverse environmental impacts in traditional solvent extraction processes could be avoided. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie301852r