Biolixiviación de metales a partir de residuos de procesos de mecanizado

Translated title of the contribution: Contenido bioleaching of metals from machining process wastes

M. Gómez-Ramírez, A. M. Rivas-Castillo, F. Moreno-Villanueva, N. G. Rojas-Avelizapa

Research output: Contribution to journalArticlepeer-review

Abstract

The present study evaluates the ability of Acidithiobacillus thiooxidans DSM 26636 to grow and leach metals from industrial wastes (IW) containing245 differentModeladometalde la compositions,biodegradacióncodeden biorreactoresas IW-steeldeandlodosIW-scrap.de hidrocarburosFor this purpose,totales delbiolixiviationpetróleo was assessed during 21 days at 30°C and 150 rpm, with 1% (w/v) of IW pulp density. Microbial growth was evaluated periodically intemperizados en suelos y sedimentos by measuring sulfate production; pH and sulfuric acid concentration were also monitored, and metal bioleaching was evaluated by ICP-OES. Results showed(Biodegradationthat A. thiooxidansmodeling sulfur-oxidizingof sludge bioreactorsactivityof totalwaspetroleumhigher inhydrocarbonsthe presenceweatheringof IW-steel.in soilSpecifically, sulfates and sulfuric acid concentrations in IW-steel corresponded to 21,522 ± 1,059 mg/L and 0.0988 ± 0.0030 M at day 21, and sediments) respectively, and a pH diminution from 3.0 to 1.46 ± 0.10 was detected. In the case of IW-scrap, sulfate production only increased to up to 4,392 ± 335 mg/LS.A.onMedina-Moreno,day 21, and no S.pHHuerta-Ochoa,reduction wasC.A.detected.Lucho-Constantino,Besides, metalL. removalAguilera-Vázquez,was differentA. Jiménez-in IW-steel and IW-scrap. The results obtainedGonzálezreinforcey M. Gutiérrez-Rojasthe fact that A. thiooxidans DSM 26636 presents potential to be employed for the bio-treatment of high-metal-content 259 Crecimiento, industrial sobrevivencia residues, y adaptación and that de its Bifidobacterium biolixiviation infantis capability a condiciones strongly depends ácidas on the metal load present in them.

Translated title of the contributionContenido bioleaching of metals from machining process wastes
Original languageSpanish
Pages (from-to)751-759
Number of pages9
JournalRevista Mexicana de Ingeniera Quimica
Volume20
Issue number2
DOIs
StatePublished - 1 May 2021

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