2026-11-03T00:54:39Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/95042024-07-27T00:05:24Zcom_10259_5495com_10259_5086com_10259_2604com_10259_9266com_10259_9491com_10259_3596com_10259_6168col_10259_5496col_10259_9267col_10259_9492col_10259_3597col_10259_6169

Curiel Alegre, Sandra Fuente Vivas, Dalia de la Khan, Aqib Hassan Ali García Tojal, Javier Velasco Arroyo, Blanca Rumbo Lorenzo, Carlos Soja, Gerhard Rad Moradillo, Juan Carlos Barros García, Rocío 2024-07-26T11:36:55Z 2024-07-26T11:36:55Z 2024-07-01 0013-9351 http://hdl.handle.net/10259/9504 10.1016/j.envres.2024.118880 Persistent, aged hydrocarbons in soil hinder remediation, posing a significant environmental threat. While bioremediation offers an environmentally friendly and cost-effective approach, its efficacy for complex contaminants relies on enhancing pollutant bioavailability. This study explores the potential of immobilized bacterial consortia combined with biochar and rhamnolipids to accelerate bioremediation of aged total petroleum hydrocarbon (TPH)-contaminated soil. Previous research indicates that biochar and biosurfactants can increase bioremediation rates, while mixed consortia offer sequential degradation and higher hydrocarbon mineralization. The present investigation aimed to assess whether combining these strategies could further enhance degradation in aged, complex soil matrices. The bioaugmentation (BA) with bacterial consortium increased the TPHs degradation in aged soil (over 20% compared to natural attenuation - NA). However, co-application of BA with biochar and rhamnolipid higher did not show a statistically prominent synergistic effect. While biochar application facilitated the maintenance of hydrocarbon degrading bacterial consortium in soil, the present study did not identify a direct influence in TPHs degradation. The biochar application in contaminated soil contributed to TPHs adsorption. Rhamnolipid alone slightly increased the TPHs biodegradation with NA, while the combined bioaugmentation treatment with rhamnolipid and biochar increased the degradation between 27.5 and 29.8%. These findings encourage further exploration of combining bioaugmentation with amendment, like biochar and rhamnolipid, for remediating diverse environmental matrices contaminated with complex and aged hydrocarbons. The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Rocio Barros reports financial support was provided by European Union's Horizon 2020 research (Grant Agreement No. 826312) and innovation program. Sandra Curiel-Alegre reports financial support was provided by Junta de Castilla y León (ORDEN EDU/1508/2020, de 15 de diciembre) application/pdf eng Elsevier Environmental Research. 2024, V. 252, 118880 https://doi.org/10.1016/j.envres.2024.118880 Atribución 4.0 Internacional http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess Biodegradation Bioaugmentation Biochar Rhamnolipids TPHs polluted soils Recalcitrant hydrocarbons Química agrícola Química inorgánica Bioquímica Biología molecular Agricultural chemistry Chemistry, Inorganic Biochemistry Molecular biology Unveiling the capacity of bioaugmentation application, in comparison with biochar and rhamnolipid for TPHs degradation in aged hydrocarbons polluted soil info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Environmental Research 252