Bioremediation of contaminated mixtures of desert mining soil and sawdust with fuel oil by aerated in-vessel composting in the Atacama Region (Chile)

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dc.contributor.authorGodoy Faundez, Alex
dc.contributor.authorAntizar Ladislao, Blanca
dc.contributor.authorReyes Bozo, Lorenzo
dc.contributor.authorCamano, Andres
dc.contributor.authorSaez Navarrete, Cesar
dc.date.accessioned2024-01-10T12:04:29Z
dc.date.available2024-01-10T12:04:29Z
dc.date.issued2008
dc.description.abstractSince early 1900s, with the beginning of mining operations and especially in the last decade, small, although repetitive spills of fuel oil had occurred frequently in the Chilean mining desert industry during reparation and maintenance of machinery, as well as casual accidents. Normally, soils and sawdust had been used as cheap readily available sorbent materials of spills of fuel oil, consisting of complex mixtures of aliphatic and aromatic hydrocarbons. Chilean legislation considers these fuel oil contaminated mixtures of soil and sawdust as hazardous wastes, and thus they must be contained. It remains unknown whether it would be feasible to clean-up Chilean desert soils with high salinity and metal content, historically polluted with different commercial fuel oil, and contained during years. Thus, this study evaluated the feasibility of aerated in-vessel composting at a laboratory scale as a bioremediation technology to clean-up contaminated desert mining soils (fuel concentration > 50,000 mg kg(-1)) and sawdust (fuel concentration > 225,000 mg kg(-1)) in the Atacama Region. The composting reactors were operated using live soil to sawdust ratios (S:SD, 1:0, 3:1, 1:1, 1:3, 0: 1, on a dry weight basis) under mesophilic temperatures (30-40 degrees C), constant moisture content (MC, 50%) and continuous aeration (161 min(-1)) during 56 days. Fuel oil concentration and physico-chemical changes in the composting reactors were monitored following standard procedures. The highest (59%) and the lowest (35%) contaminant removals were observed in the contaminated sawdust and contaminated soil reactors after 56 days of treatment, respectively. The S:SD ratio, time of treatment and interaction between both factors had a significant effect (p < 0.050) on the contaminant removal. The results of this research indicate that bioremediation of an aged contaminated mixture of desert mining soil and sawdust with fuel oil is feasible. This study recommends a S:SD ratio 1:3 and a correct nutrient balance in order to achieve a maximum overall hydrocarbon removal of fuel oil in the weathered and aged contaminated wastes. (C) 2007 Elsevier B.V. All rights reserved.
dc.fechaingreso.objetodigital27-03-2024
dc.format.extent9 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.jhazmat.2007.06.038
dc.identifier.eissn1873-3336
dc.identifier.issn0304-3894
dc.identifier.pubmedidMEDLINE:17630187
dc.identifier.urihttps://doi.org/10.1016/j.jhazmat.2007.06.038
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/75811
dc.identifier.wosidWOS:000253829200045
dc.information.autorucIngeniería;Godoy-Faúndez A;S/I;5895
dc.information.autorucIngeniería;Reyes-Bozo L;S/I;12236
dc.information.autorucIngeniería;Sáez-Navarrete C;S/I;104647
dc.issue.numero2-3
dc.language.isoen
dc.nota.accesocontenido parcial
dc.pagina.final657
dc.pagina.inicio649
dc.publisherELSEVIER SCIENCE BV
dc.revistaJOURNAL OF HAZARDOUS MATERIALS
dc.rightsacceso restringido
dc.subjectbioremediation
dc.subjectcomposting
dc.subjectfuel oil
dc.subjectmining desert soil
dc.subjectAtacama
dc.subjectAROMATIC-HYDROCARBONS PAHS
dc.subjectBIODEGRADATION
dc.subjectREMEDIATION
dc.subjectSALINITY
dc.subjectSORPTION
dc.subjectSLUDGE
dc.subjectKUWAIT
dc.titleBioremediation of contaminated mixtures of desert mining soil and sawdust with fuel oil by aerated in-vessel composting in the Atacama Region (Chile)
dc.typeartículo
dc.volumen151
sipa.codpersvinculados5895
sipa.codpersvinculados12236
sipa.codpersvinculados104647
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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