Biotechnological applications of marine bacteria in bioremediation of environments polluted with hydrocarbons and plastics

Muriel-Millán, Luis Felipe; Millán-López, Sofía; Pardo-López, Liliana

doi:10.1007/s00253-021-11569-4

Cited by 19 publications

(8 citation statements)

References 113 publications

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“…Finally, in addition to natural and anthropogenic inputs of hydrocarbons into the marine environment due to oil extraction and transportation activities, petroleum-based pollution in the form of plastics is also a major issue. Plastics enter the ocean at approximately 10 million metric tons annually (Jambeck et al, 2015), providing surfaces for microbial colonization, while also leaching hydrocarbons into the surrounding environment (reviewed in Muriel-Millán et al, 2021; Pinto et al, 2022). Thus, plastic pollution contributes to the pool of hydrocarbons available for microbial consumption.…”

Section: Discussionmentioning

confidence: 99%

Novel, active, and uncultured hydrocarbon degrading microbes in the ocean

Howe,

Zaugg,

Mason

2024

Preprint

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Given the vast quantity of oil and gas input to the marine environment annually, hydrocarbon degradation by marine microorganisms is an essential ecosystem service. Linkages between taxonomy and hydrocarbon degradation capabilities are largely based on cultivation studies, leaving a knowledge gap regarding the intrinsic ability of uncultured marine microbes to degrade hydrocarbons. To address this knowledge gap, metagenomic sequence data from the Deepwater Horizon (DWH) oil spill deep-sea plume was assembled to which metagenomic and metatranscriptomic reads were mapped. Assembly and binning produced new DWH metagenome assembled genomes that were evaluated along with their close relatives, all of which are from the marine environment (38 total). These analyses revealed globally distributed hydrocarbon degrading microbes with clade specific substrate degradation potentials that have not been reported previously. For example, methane oxidation capabilities were identified in all Cycloclasticus. Further, all Bermanella encoded and expressed genes for non-gaseous n-alkane degradation; however, DWH Bermanella encoded alkane hydroxylase, not alkane 1-monooxygenase. All but one previously unrecognized DWH plume members in the SAR324 and UBA11654 coded for aromatic hydrocarbon degradation. In contrast, Colwellia were diverse in the hydrocarbon substrates they could degrade. All clades encoded nutrient acquisition strategies and response to cold temperatures, while sensory and acquisition capabilities were clade specific. These novel insights regarding hydrocarbon degradation by uncultured planktonic microbes provided missing data, allowing for better prediction of the fate of oil and gas when hydrocarbons are input to the ocean, leading to a greater understanding of the ecological consequences to the marine environment.

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Section: Discussionmentioning

confidence: 99%

Novel, active, and uncultured hydrocarbon degrading microbes in the ocean

Howe,

Zaugg,

Mason

2024

Preprint

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“…Among the enzymes of marine origin identified and isolated are mainly hydrolases and oxidoreductases, which catalyze hydrolysis reactions of chemical bonds and oxidation-reduction reactions (Muriel-Millán et al, 2019;Moreno-Ulloa et al, 2020;Rodrıǵuez-Salazar et al, 2020;Loza et al, 2022). In marine environments, these enzymes participate in the degradation of organic compounds, that is, they contribute to different degradation pathways of the metabolism of marine microorganisms as well as in the degradation of other toxic compounds, such as oil and plastic pollutants (Muriel-Millań et al, 2021). These enzymes are further used to process food, drugs, paper, starch, textiles and manufacture detergents by the industry.…”

Section: Natural Degradation Of Hydrocarbonsmentioning

confidence: 99%

Ocean monitoring, observation network and modelling of the Gulf of Mexico by CIGOM

et al. 2023

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The tragic accident of the Macondo platform operated by British Petroleum (BP) unleashed in 2010 one of the largest oil spills in history, lasting over three months, spilling nearly 500 million liters of oil in one of the most biodiverse ocean regions. This accident revealed the technological deficiencies for the control of a spill in deep waters of the hydrocarbon industry. Simultaneously it showed important gaps in knowledge to predict the propagation and fate of the large volumes of hydrocarbons at depth and on the surface ocean and, more importantly, on their impact on the great ecosystem of the Gulf of Mexico. The necessity to understand and predict the transport, fate and ecosystem-level impacts of large oil spills in the southern Gulf of Mexico, a key region for oil exploration and extraction, led policymakers, scientists, and industry representatives from PEMEX (the Mexican oil company) to jointly launch an ocean observation project (2015-22) aimed to provide a multi-layered environmental baseline, develop a modern monitoring and computational modeling capacity and promote scientific understanding of the marine environment throughout the Mexican Exclusive Economic Zone (EEZ). The initiative, led by the Research Consortium for the Gulf of Mexico (CIGoM), brought together more than 300 multidisciplinary researchers from more than a two dozen institutions in Mexico and abroad, including the Centre for Scientific Research and Higher Education of Ensenada (CICESE) as the leading institution, the National Autonomous University of Mexico (UNAM), the Centre for Research and Advanced Studies of the National Polytechnic Institute (CINVESTAV) in Mérida, the Autonomous University of Baja California (UABC), and the Centre for Engineering and Industrial Development (CIDESI). Financial support was provided by the National Council for Science and Technology and the Ministry of Energy Hydrocarbon Fund.

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“…According to these studies, biosurfactants are effective at low concentrations and show higher efficiency rates in biodegradation processes in adverse environments than chemical surfactants [ 76 ]. Biosurfactants can improve oil solubility and rapidly emulsify oil into tiny drops that can be biodegraded by microorganisms.…”

Section: Environmental Uses Of Biosurfactantsmentioning

confidence: 99%

Microbial biosurfactants: a review of recent environmental applications

et al. 2022

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Microbial biosurfactants are low-molecular-weight surface-active compounds of high industrial interest owing to their chemical properties and stability under several environmental conditions. The chemistry of a biosurfactant and its production cost are defined by the selection of the producer microorganism, type of substrate, and purification strategy. Recently, biosurfactants have been applied to solve or contribute to solving some environmental problems, with this being their main field of application. The most referenced studies are based on the bioremediation of contaminated soils with recalcitrant pollutants, such as hydrocarbons or heavy metals. In the case of heavy metals, biosurfactants function as chelating agents owing to their binding capacity. However, the mechanism by which biosurfactants typically act in an environmental field is focused on their ability to reduce the surface tension, thus facilitating the emulsification and solubilization of certain pollutants ( in-situ biostimulation and/or bioaugmentation). Moreover, despite the low toxicity of biosurfactants, they can also act as biocidal agents at certain doses, mainly at higher concentrations than their critical micellar concentration. More recently, biosurfactant production using alternative substrates, such as several types of organic waste and solid-state fermentation, has increased its applicability and research interest in a circular economy context. In this review, the most recent research publications on the use of biosurfactants in environmental applications as an alternative to conventional chemical surfactants are summarized and analyzed. Novel strategies using biosurfactants as agricultural and biocidal agents are also presented in this paper.

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Biotechnological applications of marine bacteria in bioremediation of environments polluted with hydrocarbons and plastics

Cited by 19 publications

References 113 publications

Novel, active, and uncultured hydrocarbon degrading microbes in the ocean

Novel, active, and uncultured hydrocarbon degrading microbes in the ocean

Ocean monitoring, observation network and modelling of the Gulf of Mexico by CIGOM

Microbial biosurfactants: a review of recent environmental applications

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