Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Pauliina Nurmi"'
Autor:
Kirsi Määttä, Nelli J. Beecroft, Anna H. Kaksonen, Katja Laukkanen, Jaakko A. Puhakka, Pauliina Nurmi, Anna-Kaisa Halinen, Marja Riekkola-Vanhanen
Publikováno v:
Hydrometallurgy. :34-41
In the present work the microbial community of a low grade nickel ore demonstration-scale bioheap was examined under varying weather (outside air temperature between + 30 and − 39 °C) and operational conditions over a period of three years in Talv
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3513117ba9cf55c703051f2058626d33
https://doi.org/10.1016/j.hydromet.2012.05.001
https://doi.org/10.1016/j.hydromet.2012.05.001
Autor:
Pauliina Nurmi, Anna H. Kaksonen, Olli H. Tuovinen, Marja Riekkola-Vanhanen, Keiko Sasaki, Bestamin Özkaya, Jaakko A. Puhakka
Publikováno v:
Hydrometallurgy. 101:7-14
Effluents from bioleaching processes cause severe problems if dispersed in the environment since they typically have very low pH values and high sulfate and ferric iron concentrations. Dissolved iron may also interfere with the metal recovery. In the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::296f680e0c489c0fa7015040655139d1
https://doi.org/10.1016/j.hydromet.2009.11.004
https://doi.org/10.1016/j.hydromet.2009.11.004
Autor:
Olli H. Tuovinen, Jaakko A. Puhakka, Bestamin Özkaya, Anna H. Kaksonen, Pauliina Nurmi, Marja Riekkola-Vanhanen
Publikováno v:
Process Biochemistry. 44:1315-1322
Iron has a central role in bioleaching and biooxidation processes. Fe2+ produced in the dissolution of sulfidic minerals is re-oxidized to Fe3+ mostly by biological action in acid bioleaching processes. To control the concentration of iron in solutio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::744057112e5ce79e2d46829d2f3c5aeb
https://doi.org/10.1016/j.procbio.2009.07.004
https://doi.org/10.1016/j.procbio.2009.07.004
Publikováno v:
Bioprocess and Biosystems Engineering. 33:449-456
In this study, the applicability of three modelling approaches was determined in an effort to describe complex relationships between process parameters and to predict the performance of an integrated process, which consisted of a fluidized bed biorea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::88c7cf51cc9075e661c130218af000bd
https://doi.org/10.1007/s00449-009-0346-5
https://doi.org/10.1007/s00449-009-0346-5
Publikováno v:
Hydrometallurgy. 97:137-145
The inhibition kinetics of iron oxidation was studied in a Leptospirillum ferriphilum -dominated, fluidized bed bioreactor culture, which was challenged with various concentrations of Fe 3+ , Zn 2+ and Ni 2+ . Iron(II) was oxidized in the presence of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c8ffdfea78671a64b3652f1d4804beba
https://doi.org/10.1016/j.hydromet.2009.02.003
https://doi.org/10.1016/j.hydromet.2009.02.003
Publikováno v:
Advanced Materials Research. :437-440
Geochemical modeling program PHREEQC was used to simulate generic bioleaching processes. Carbonate minerals (e.g., calcite) dissolve in acid solution, increasing the solution pH and Ca concentration while the concentration of CO2 may be controlled by
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1f35bd26c7208138cf0e76874c5ed37a
https://doi.org/10.4028/www.scientific.net/amr.71-73.437
https://doi.org/10.4028/www.scientific.net/amr.71-73.437
Publikováno v:
Advanced Materials Research. :441-444
In this study the effects of pH and temperature on iron solubility were predicted using the geochemical modelling code PHREEQC and the thermodynamic database WATEQ4F. The modelling results demonstrated that the solubility of secondary solid phases fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::10a3cf5019ccdd3715b6716a913da05e
https://doi.org/10.4028/www.scientific.net/amr.71-73.441
https://doi.org/10.4028/www.scientific.net/amr.71-73.441
Publikováno v:
Advanced Materials Research. :445-448
The purpose of this study was to model, based on thermodynamic equilibrium constants, the effects of chloride and phosphate ion on the speciation of ferric iron in solution and on Fe(III)-precipitates. The thermodynamic modelling was based on the geo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::07ad078685dfebab2ef431ca9d94085f
https://doi.org/10.4028/www.scientific.net/amr.71-73.445
https://doi.org/10.4028/www.scientific.net/amr.71-73.445
Publikováno v:
Hydrometallurgy. 88:67-74
Iron is a key element influencing bacterial growth, oxidation efficiency and precipitate formation for most industrial applications using bioleaching and biooxidation processes. In this study, iron oxidation by an enrichment culture dominated by Lept
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c43887af61cc67145b600777f5c3f32c
https://doi.org/10.1016/j.hydromet.2007.02.009
https://doi.org/10.1016/j.hydromet.2007.02.009
Publikováno v:
Advanced Materials Research. :465-468
In this study, ferrous iron oxidation rates of a Leptospirillum ferriphilum dominated culture were determined over the temperature range of 2-50oC at pH below one. The results show that at pH 0.9 the culture oxidizes iron within the temperature range
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eeda4b3a24064276280e69b5cb4f95c5
https://doi.org/10.4028/www.scientific.net/amr.20-21.465
https://doi.org/10.4028/www.scientific.net/amr.20-21.465