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dc.contributor.authorCuriel Alegre, Sandra 
dc.contributor.authorVelasco Arroyo, Blanca 
dc.contributor.authorRumbo Lorenzo, Carlos 
dc.contributor.authorKhan, Aqib Hassan Ali 
dc.contributor.authorTamayo Ramos, Juan Antonio 
dc.contributor.authorRad Moradillo, Juan Carlos 
dc.contributor.authorGallego, José Luis
dc.contributor.authorBarros García, Rocío 
dc.date.accessioned2023-02-08T11:50:30Z
dc.date.available2023-02-08T11:50:30Z
dc.date.issued2022-11
dc.identifier.issn0045-6535
dc.identifier.urihttp://hdl.handle.net/10259/7423
dc.description.abstractIn the present work, the operational conditions for improving the degradation rates of Total Petroleum Hydrocarbons (TPHs) in contaminated soil from a machinery park were optimized at a microcosms scale along a 90- days incubation period. In this study, bioremediation strategies and an organic amendment have been tested to verify the remediation of soil contaminated with different hydrocarbons, mineral oils, and heavy metals. Specifically, designed biostimulation and bioaugmentation strategies were compared with and without adding vermicompost. The polluted soil harboring multiple contaminants, partially attenuated for years, was used. The initial profile showed enrichment in heavy linear alkanes, suggesting a previous moderate weathering. The application of vermicompost increased five and two times the amounts of available phosphorus (P) and exchangeable potassium (K), respectively, as a direct consequence of the organic amendment addition. The microbial activity increased due to soil acidification, which influenced the solubility of P and other micronutrients. It also impacted the predominance and variability of the different microbial groups and the incubation, as reflected by phospholipid fatty acid (PLFA) results. An increase in the alkaline phosphatases and proteases linked to bacterial growth was displayed. This stimulation of microbial metabolism correlated with the degradation rates since TPHs degradation’ efficiency after vermicompost addition reached 32.5% and 34.4% of the initial hydrocarbon levels for biostimulation and bioaugmentation, respectively. Although Polycyclic Aromatic Hydrocarbons (PAHs) were less abundant in this soil, results also decreased, especially for the most abundant, the phenanthrene. Despite improving the degradation rates, results revealed that recalcitrant and hydrophobic petroleum compounds remained unchanged, indicating that mobility, linked to bioavailability, probably represents the limiting step for further soil recovery.en
dc.description.sponsorshipThis work is funded by the GREENER project of the European Union’s Horizon 2020 research and innovation program (Grant Agreement No. 826312). S. Curiel pre-doctoral contract was funded by Junta de Castilla y Leon ´ (ORDEN EDU/1508/2020, de 15 de diciembre).en
dc.format.mimetypeapplication/pdf
dc.language.isoenges
dc.publisherElsevieren
dc.relation.ispartofChemosphere. 2022, V. 307, 135638en
dc.rightsAtribución-NoComercial 4.0 Internacional*
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/*
dc.subjectBiostimulationen
dc.subjectBioaugmentationen
dc.subjectPhospholipid fatty acidsen
dc.subjectTotal petroleum hydrocarbons polluted soilsen
dc.subjectSoil enzymesen
dc.subject.otherMaterialeses
dc.subject.otherMaterialsen
dc.titleEvaluation of biostimulation, bioaugmentation, and organic amendments application on the bioremediation of recalcitrant hydrocarbons of soilen
dc.typeinfo:eu-repo/semantics/articlees
dc.rights.accessRightsinfo:eu-repo/semantics/openAccesses
dc.relation.publisherversionhttps://doi.org/10.1016/j.chemosphere.2022.135638es
dc.identifier.doi10.1016/j.chemosphere.2022.135638
dc.relation.projectIDinfo:eu-repo/grantAgreement/EC/H2020/826312/EU/InteGRated systems for Effective ENvironmEntal Remediation/GREENER/en
dc.journal.titleChemosphereen
dc.volume.number307es
dc.type.hasVersioninfo:eu-repo/semantics/publishedVersiones


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