Recovery of scrap iron metal value using biogenerated ferric iron
Autor: | Donald R. Lueking, Carl C. Nesbitt, Nicholas R. Ballor |
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Rok vydání: | 2006 |
Předmět: |
Conservation of Natural Resources
Acidithiobacillus Iron Inorganic chemistry chemistry.chemical_element Bioengineering Scrap Applied Microbiology and Biotechnology Ferrous Metal Bioreactors Waste Management Cations Cementation (metallurgy) Electrochemistry Bioreactor Leachate Lixiviant Metallurgy Hydrogen-Ion Concentration Copper chemistry visual_art visual_art.visual_art_medium Oxidation-Reduction Cell Division Biotechnology |
Zdroj: | Biotechnology and Bioengineering. 93:1089-1094 |
ISSN: | 1097-0290 0006-3592 |
Popis: | The utility of employing biogenerated ferric iron as an oxidant for the recycling of scrap metal has been demonstrated using continuously growing cells of the extremophilic organism Acidithiobacillus ferrooxidans. A ferric iron rich (70 mol%) lixiviant resulting from bioreactor based growth of A. ferrooxidans readily solubilized target scrap metal with the resultant generation of a leachate containing elevated ferrous iron levels and solubilized copper previously resident in the scrap metal. Recovery of the copper value was easily accomplished via a cementation reaction and the clarified leachate containing a replenished level of ferrous iron as growth substrate was shown to support the growth of A. ferrooxidans and be fully recyclable. The described process for scrap metal recycling and copper recovery was shown to be efficient and economically attractive. Additionally, the utility of employing the E(h) of the growth medium as a means for monitoring fluctuations in cell density in cultures of A. ferrooxidans is demonstrated. |
Databáze: | OpenAIRE |
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