Reagent-free flow-injection amperometric sensor for quantification and speciation of iron for bio-hydrometallurgical applications
By Albert Saavedra and Edgardo Donati and Eduardo Cort
Published in Sensors and Actuators B: Chemical
2015
Abstract
Iron ions are monitored in processes such as bio-leaching, bio-oxidation, ferric leaching, passivation control, and others. The role of iron in different hydrometallurgy processes is very important because it affects strongly several industrial ore production, as chalcopyrite cooper extraction. In this work we present an amperometric \FIA\ system that allows rapid quantification and speciation of iron in bio-mining processes. Linearity range, passivation of the working electrode and interferences were studied. We found a useful lineal range from 10 to 1500 mg L?1 for each of the ions, with a detection limit (Fe2+ and Fe3+) determined at 15