Project 51/2012

The study of the effect of organic complexing agents of Fe(III) or Fe(II) on iron monosulfide oxidative dissolution

The present study aims at investigating the effect of typical ferric complexing agents on FeS oxidative dissolution in the presence of dissolved oxygen at different pHs and temperatures. In addition the effect of ferrous complexing agents on FeS oxidative dissolution will be also tested. A particular attention will be paid to the influence of some new organic structures, with potential to bind ferric or ferrous cations, on FeS (or other metal sulfides with similar reactivity of FeS) oxidative dissolution.
The objectives of each team are as follows

UNIVERSITY OF CRAIOVA

- The identification of the effects of Fe(II) complexing agents on FeS oxidative dissolution
- The identification of the effects of Fe(III) complexing agents on FeS oxidative dissolution
- The identification of the effects of iron complexing agents on oxidative dissolution of mineral sulfides with a similar reactivity to that of FeS
- The identification of the effects of complexing agents of the cations from mineral sulfides with a similar reactivity to that of FeS on their oxidative dissolution See results ...

UNIVERSITY "AI CUZA" IASI

- The synthesis of new ligands for complexation of Fe(II)
- The synthesis of new ligands for complexation of Fe(III)
- The synthesis of new ligands for complexation of metal cations from PbS, ZnS, CuFeS₂ See results ...

NATIONAL INSTITUTE OF MATERIALS PHYSICS BUCHAREST

- Chemical and optical characterization of the surface of the FeS samples reacted in the presence of different Fe(II) ligands
- Chemical and optical characterization of the surface of the FeS samples reacted in the presence of different Fe(III) complexing agents
- Chemical and optical characterization of the surface of mineral sulfides with a similar reactivity to that of FeS in the presence of iron ligands
- Chemical and optical characterization of the surface of mineral sulfides with a similar reactivity to that of FeS in the presence of complexing agents of cations from these minerals See results ...

The project will improve our knowledge in the field of mineral sulfides oxidative dissolution. This knowledge will help us to estimate the role played by organic ligands on FeS transformations. Concomitantly, revealing new details of the FeS oxidative dissolution will help to improve the minerals processing performance and the control of Acid Mine Drainage. Also, the efforts to study the inhibition effect of organic ligands on the FeS oxidative dissolution will lead to improvements of infrastructure and human resource.The new acquired skills will foster the development of dynamic teams able to approach complex problems of environmental contamination by minerals weathering