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dc.contributor.authorPotysz, Anna
dc.contributor.authorLenz, Markus
dc.contributor.authorHedwig, Sebastian
dc.date.accessioned2021-05-06T10:41:08Z
dc.date.available2021-05-06T10:41:08Z
dc.date.issued2020-09-09
dc.identifier.doi10.1016/j.jece.2020.104450
dc.identifier.urihttps://irf.fhnw.ch/handle/11654/32384
dc.description.abstractMetallurgical wastes contain metals that are unrecovered during industrial processing. The disposal of these wastes is technically difficult due to the potential release of metals through weathering. Therefore, alternative management methods are currently sought. The high leaching susceptibility of these wastes combined with the need for alternative sources of rare and critical metals creates a need for residual element recovery. This study evaluated the leaching potential of lead matte and copper slag through chemical mineral acid leaching as well as indirect bioleaching with organic acids and direct bioleaching using Acidithiobacillus thiooxidans. The leaching efficiency of these acids was compared based on different normality equivalents. Additionally, the effects of pulp density (1–10%) and extraction time (24–48 h) were assessed. Slag toxicity was assessed with a germination test in concentrated and diluted leachates using Brassica juncea. The results demonstrated that copper slag is particularly suitable for chemical treatment because as much as 91 wt.% Cu and 85 wt.% Zn or 70 wt.% Cu and 81 wt.% Zn were extracted using HNO3 or bacterial leaching, respectively. The residual slag was characterized by significant metal depletion and the presence of gypsum, rendering it more suitable for further use or disposal. Lead matte released 65 wt.% Cu and 8 wt.% Zn using mineral acid leaching while 70 wt.% Cu and 12 wt.% Zn were released using bacterial leaching. Further process optimization is needed for lead matte to generate residue depletion in toxic metals. Toxicity assessment showed toxic characteristics in metal-loaded leachates originating from waste treatment that inhibited germination rates and root development.en_US
dc.description.urihttps://www.sciencedirect.com/science/article/pii/S2213343720307995en_US
dc.language.isoenen_US
dc.relation.ispartofJournal of Environmental Chemical Engineeringen_US
dc.accessRightsAnonymous*
dc.subjectcopper slagen_US
dc.subjectlead matteen_US
dc.subjecttoxicityen_US
dc.subjectbioleachingen_US
dc.subjectmetalsen_US
dc.titleBioleaching and toxicity of metallurgical wastesen_US
dc.type01 - Zeitschriftenartikel, Journalartikel oder Magazin*
dc.volume8en_US
dc.issue6en_US
dc.audienceScienceen_US
fhnw.publicationStatePublisheden_US
fhnw.ReviewTypeAnonymous ex ante peer review of a complete publicationen_US
fhnw.InventedHereYesen_US
fhnw.PublishedSwitzerlandYesen_US
fhnw.IsStudentsWorknoen_US
fhnw.publicationOnlineJaen_US


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