Model naphthenic acids removal by microalgae and Base Mine Lake cap water microbial inoculum

Yu, Xiaoxuan; Lee, Korris; Ulrich, Ania C.

doi:10.1016/j.chemosphere.2019.06.110

Cited by 19 publications

(1 citation statement)

References 53 publications

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“…For instance, mixed bacterial communities have been shown to degrade model NAs more rapidly than pure cultures (Demeter et al 2014 ), and Pseudomonas co-cultures degraded a higher quantity of NAs in OSPW than was observed in pure cultures (Chegounian et al 2021 ). Similarly, co-cultures of algae and microorganisms in inocula from an end pit lake degraded cyclohexaneacetic acid while the pure algal cultures or pure end pit lake inoculum did not (Yu et al 2019 ). Furthermore, bacterial and algal consortia from OSPW degraded the recalcitrant ACA (Paulssen and Gieg 2019 ), and interactome networks of anaerobic NA-degrading bacteria suggested syntrophic relationships in biodegrading processes (Lv et al 2020b ).…”

Section: Factors Influencing the Biodegradability Of Nasmentioning

confidence: 99%

Microbial degradation of naphthenic acids using constructed wetland treatment systems: metabolic and genomic insights for improved bioremediation of process-affected water

Reis,

Correa-Garcia,

Tremblay

et al. 2023

FEMS Microbiology Ecology

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Naphthenic acids (NAs) are a complex mixture of organic compounds released during bitumen extraction from mined oil sands that are important contaminants of oil sands process-affected water (OSPW). NAs can be toxic to aquatic organisms and, therefore, are a main target compound for OSPW. The ability of microorganisms to degrade NAs can be exploited for bioremediation of OSPW using constructed wetland treatment systems (CWTS), which represent a possible low energy and low-cost option for scalable in situ NA removal. Recent advances in genomics and analytical chemistry have provided insights into a better understanding of the metabolic pathways and genes involved in NA degradation. Here, we discuss the ecology of microbial NA degradation with a focus on CWTS and summarize the current knowledge related to the metabolic pathways and genes used by microorganisms to degrade NAs. Evidence to date suggests that NAs are mostly degraded aerobically through ring cleavage via the beta-oxidation pathway, which can be combined with other steps such as aromatization, alpha-oxidation, omega-oxidation, or activation as coenzyme A (CoA) thioesters. Anaerobic NA degradation has also been reported via the production of benzoyl-CoA as an intermediate and/or through the involvement of methanogens or nitrate, sulfate, and iron reducers. Furthermore, we discuss how genomic, statistical, and modeling tools can assist in the development of improved bioremediation practices.

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