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Biochemical treatment of leachates from hydrometallurgical recycling of spent alkaline batteries

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cris.lastimport.scopus2024-02-12T20:19:44Z
dc.abstract.enRecycling of waste electrical and electronic equipment including spent batteries focuses on maximizing the material recovery efficiency (of metals, polymers, or solvents) and decreasing the negative environmental impact of leachates that remain after the treatment (i.e. the secondary wastes). The major aim of this study was to develop a novel, low-cost biochemical treatment technology for the management of effluents generated during sulfuric acid–based hydrometallurgical recycling of spent alkaline batteries. We explored the use of various chemical reagents (40% NaOH, 20% Na2CO3, and 1% NH3(aq)) and biogenic ammonia produced by urea-degrading bacteria to increase the pH of the effluents (from pH 0.5 to pH 5.0) and prepare them for further treatment by sulfate-reducing bacteria. Comparisons of the pretreatment efficiency and metal and sulfate removal yields, as well as the characterization of the neutralization products (sediments and effluents) showed that the most promising results were obtained when the raw leachates were treated with 40% NaOH (to reach pH 3.5), followed by the addition of biogenic ammonia (to reach pH 5.0). Sulfate-reducing bacteria (SRB) activity led to a further pH increase (up to ~7.3), almost complete (99%) sulfate removal and metal sulfide (ZnS, MnS) precipitation, as up to ~99% of Zn and Mn were removed in SRB cultures to which appropriately diluted pretreated leachates had been added. The presented study indicated that the pretreatment and neutralization of hydrometallurgical effluents based on the use of urea-degrading and sulfatereducing bacteria could be an attractive alternative to conventional chemical treatment.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorRogulski, Zbigniew
dc.contributor.authorKarczewska-Golec, Joanna
dc.contributor.authorJakusz, Grażyna
dc.contributor.authorDębiec-Andrzejewska, Klaudia
dc.contributor.authorDrewniak, Łukasz
dc.contributor.authorRetka, Jacek
dc.contributor.authorUhrynowski, Witold
dc.contributor.authorYang, Zhendong
dc.date.accessioned2024-01-24T18:38:50Z
dc.date.available2024-01-24T18:38:50Z
dc.date.issued2020
dc.description.financePublikacja bezkosztowa
dc.description.volume191
dc.identifier.doi10.1016/J.HYDROMET.2019.105223
dc.identifier.issn0304-386X
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/102316
dc.languageeng
dc.pbn.affiliationbiological sciences
dc.relation.ispartofHydrometallurgy
dc.relation.pagesart.no. 105223
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.subject.enE&E waste
dc.subject.enBattery recycling
dc.subject.enAlkaline batteries
dc.subject.enSulfate-reducing bacteria
dc.subject.enLeachate treatment
dc.subject.enUrea-degrading bacteria
dc.titleBiochemical treatment of leachates from hydrometallurgical recycling of spent alkaline batteries
dc.typeJournalArticle
dspace.entity.typePublication