2026-05-06T11:37:32Zhttps://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

00925njm 22002777a 4500 dc Curiel Alegre, Sandra author Fuente Vivas, Dalia de la author Khan, Aqib Hassan Ali author García Tojal, Javier author Velasco Arroyo, Blanca author Rumbo Lorenzo, Carlos author Soja, Gerhard author Rad Moradillo, Juan Carlos author Barros García, Rocío author 2024-07-01 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. 0013-9351 http://hdl.handle.net/10259/9504 10.1016/j.envres.2024.118880 Biodegradation Bioaugmentation Biochar Rhamnolipids TPHs polluted soils Recalcitrant hydrocarbons Unveiling the capacity of bioaugmentation application, in comparison with biochar and rhamnolipid for TPHs degradation in aged hydrocarbons polluted soil