Screening peptide-ore interactions with a phage display library for bioflotation application

CIM Journal, Vol. 7, No. 3, 2016

A. P. Bunger
Department of Civil and Environmental Engineering and Department of Chemical and Petroleum Engineering,
University of Pittsburgh, Pittsburgh, Pennsylvania, USA

J. Kear
CSIRO Energy, Melbourne, Australia

R. G. Jeffrey
SCT Operations, Wollongong, Australia

R. Prioul
Schlumberger-Doll Research, Cambridge, Massachusetts, USA

D. Chuprakov
Schlumberger Moscow Research, Moscow, Russia

 

http://dx.doi.org/10.15834/cimj.2016.20
Résumé Une librairie d’heptapeptides présentés sur des bactériophages M13 (phages) a été criblée afin d’identifier les séquences peptidiques affinitaires à des minerais d’or, de chalcopyrite, de sphalérite, de pyrite et de silice et d’évaluer le potentiel de ces phages en tant que de bio-réactifs de flottation. De nombreuses séquences peptidiques ont été isolées par bio-criblage et différenciées d’autres séquences connues. Des isothermes d’adsorption ont été déterminées et un modèle d’interaction récepteur–ligand a été identifié et utilisé pour comparer l’affinité des séquences peptidiques par rapport aux minerais. Certaines séquences de phages possèdent une affinité légèrement inférieure pour la sphalérite comparativement aux autres sulfures. L’adsorption sur les sulfures était plus élevée que sur la silice. Des mesures de temps d’induction suggèrent que les phages filamenteux M13 diminuent l’hydrophobicité de la surface des minerais.
Mots clés : Collecteur, criblage, dépresseur, expression des phages, flottation par écume,hydrophobicité, isotherme d’adsorption, peptides, source biologique, temps d’induction
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