Volume 46, Issue 10-11 p. 842-846
ECASIA special issue paper

Influence of 2,2′-bipyridine on oxidative dissolution of iron monosulfide

Paul Chiriţă

Paul Chiriţă

Department of Chemistry, University of Craiova, Craiova, 200585 Romania

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Cătălina E. Bădică

Corresponding Author

Cătălina E. Bădică

Department of Chemistry, University of Craiova, Craiova, 200585 Romania

Correspondence to: C. E. Bădică, Department of Chemistry, University of Craiova, Calea Bucuresti 107I, Craiova 200585, Romania.

E-mail: [email protected]

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Cristina A. Constantin

Cristina A. Constantin

Department of Chemistry, University of Craiova, Craiova, 200585 Romania

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Lucian M. Bîrsă

Lucian M. Bîrsă

Department of Chemistry, Alexandru Ioan Cuza University, Iasi, 700506 Romania

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Elena Matei

Elena Matei

Laboratory of Optical Processes in Nanostructured Materials, National Institute of Materials Physics, Bucharest, R077125 Romania

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Mihaela Baibarac

Mihaela Baibarac

Laboratory of Optical Processes in Nanostructured Materials, National Institute of Materials Physics, Bucharest, R077125 Romania

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First published: 21 March 2014
Citations: 4

Paper published as part of the ECASIA 2013 special issue.

Deceased

Abstract

The 2,2′-bipyridine effects on iron monosulfide (FeS) oxidative dissolution rates have been examined by potentiodynamic polarization and electrochemical impedance spectroscopy. The adsorption of 2,2′-bipyridine to synthetic FeS was investigated by batch adsorption experiments, SEM, energy-dispersive X-ray analysis and Raman spectroscopy. The experiments were performed in air-saturated solutions at pH 5, 25 °C and an ionic strength of I = 0.004 M NaCl. Correlation between oxidative dissolution rates and 2,2′-bipyridine adsorption suggests that FeS oxidative dissolution is the result of two antagonistic processes: (i) the inhibiting adsorption of 2,2′-bipyridine on mineral surface and (ii) the promoting effect of 2,2′-bipyridine on the iron dissolution from FeS surface. Copyright © 2014 John Wiley & Sons, Ltd.