Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 159901 - 159901
Published: Jan. 1, 2025
Language: Английский
Chemical Reviews, Journal Year: 2024, Volume and Issue: 124(3), P. 1288 - 1320
Published: Feb. 2, 2024
Methane is a potent greenhouse gas that contributes significantly to climate change and primarily regulated in Nature by methanotrophic bacteria, which consume methane as their source of energy carbon, first oxidizing it methanol. The direct oxidation methanol chemically difficult transformation, accomplished methanotrophs complex monooxygenase (MMO) enzyme systems. These enzymes use iron or copper metallocofactors have been the subject detailed investigation. While structure, function, active site architecture copper-dependent particulate (pMMO) investigated extensively, its putative quaternary interactions, regulation, requisite cofactors, mechanism remain enigmatic. iron-dependent soluble (sMMO) has characterized biochemically, structurally, spectroscopically, and, for most part, mechanistically. Here, we review history MMO research, focusing on recent developments providing an outlook future directions field. Engineered biological catalysis systems bioinspired synthetic catalysts may continue emerge along with deeper understanding molecular mechanisms oxidation. Harnessing power these will necessitate combined efforts biochemistry, structural biology, inorganic chemistry, microbiology, computational engineering.
Language: Английский
Citations
55
Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)
Published: Sept. 30, 2023
Anaerobic methanotrophic archaea (ANME) carry out anaerobic oxidation of methane, thus playing a crucial role in the methane cycle. Previous genomic evidence indicates that multi-heme c-type cytochromes (MHCs) may facilitate extracellular electron transfer (EET) from ANME to different sinks. Here, we provide experimental supporting cytochrome-mediated EET for reduction metals and electrodes by 'Candidatus Methanoperedens nitroreducens', an acclimated nitrate reduction. Ferrous iron-targeted fluorescent assays, metatranscriptomics, single-cell imaging suggest 'Ca. M. nitroreducens' uses surface-localized redox-active metal Electrochemical Raman spectroscopic analyses also support involvement electrode Furthermore, several genes encoding menaquinone cytochrome type-c oxidoreductases MHCs are differentially expressed when acceptors used.
Language: Английский
Citations
33
Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(51), P. 21503 - 21526
Published: Dec. 14, 2023
Innovation in decarbonizing wastewater treatment is urgent response to global climate change. The practical implementation of anaerobic ammonium oxidation (anammox) treating domestic the key reconciling carbon-neutral management with sustainable development. Nitrite availability prerequisite anammox reaction, but how achieve robust nitrite supply and accumulation for mainstream systems remains elusive. This work presents a state-of-the-art review on recent advances anammox, paying special attention available pathways (forward-going (from nitrite) backward-going nitrate nitrite)), controlling strategies, physiological ecological characteristics functional microorganisms involved supply. First, we comprehensively assessed nitrite-oxidizing bacteria control methods, outlining that these technologies are transitioning possessing multiple selective pressures (such as intermittent aeration membrane-aerated biological reactor), integrating side stream free ammonia/free nitrous acid suppression recirculated sludge treatment), maintaining high activity ammonia-oxidizing competing oxygen bacteria. We then highlight emerging strategies supply, including production driven by novel microbes (ammonia-oxidizing archaea complete ammonia bacteria) reduction (partial denitrification nitrate-dependent methane oxidation). resources requirement different analyzed, hybrid pathway combining partial nitrification encouraged. Moreover, data-driven modeling process well proactive microbiome proposed hope achieving application. Finally, existing challenges further perspectives highlighted, i.e., investigation nitrite-supplying bacteria, scaling-up from laboratory under real conditions, stable performance fundamental insights this aim inspire advance our understanding about provide robustly shed light important obstacles warranting settlement.
Language: Английский
Citations
32
Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(36)
Published: Aug. 13, 2023
Abstract The conversion of methane to value‐added chemicals by traditional reforming processes suffers from intensive energy consumption due its particularly strong C─H bonds. Thus, it is urgent optimize the driving force structure for accelerating integration sustainable energy. In this review, advances in energy‐driven are systematically summarized provide a scientific understanding operation/storage concepts, reactor design, technological maturity, system optimization, and remaining issues. Furthermore, essence, economic evaluations, balance, social impacts driven carefully discussed, paving path future course research development. Diversifying mix can play an important role industries, being used as crucial step transition energy, especially combination solar/nuclear with fossil fuels produce chemicals. Additionally, review intends bridge studies development, ultimate goal offering robust framework understand current status guidance design solutions greener future.
Language: Английский
Citations
31
The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 889, P. 164213 - 164213
Published: May 15, 2023
Language: Английский
Citations
30
The Chemical Record, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 16, 2025
Abstract Direct methane to methanol conversion is a dream reaction in industrial chemistry, which takes inspiration from the biological production catalysed by monooxygenase enzymes (MMOs). Over years, extensive studies have been conducted on this topic bioengineering MMOs, and tailoring methods isolate MMOs active form. Similarly, remarkable achievements noted other activation strategies such as use of heterogeneous catalysts or molecular catalysts. In review, we outline metabolism performed methanotrophs detail latest advancements site structures catalytic mechanisms both types MMOs. Also, recent progress bioinspired approaches using various catalysts, especially first‐row transition metal zeolites mechanistic insights are discussed. addition, complexes “Periana catalyst” for through methyl ester formation presence strong acids also detailed. Compared zeolites‐mediated field, utilisation application still its nascent phase further research required overcome limitations these effectively.
Language: Английский
Citations
1
mLife, Journal Year: 2025, Volume and Issue: 4(1), P. 70 - 82
Published: Feb. 1, 2025
Abstract Anaerobic methanotrophic (ANME) microbes play a crucial role in the bioprocess of anaerobic oxidation methane (AOM). However, due to their unculturable status, diversity is poorly understood. In this study, we established microfluidics‐based epicPCR (Emulsion, Paired Isolation, and Concatenation PCR) fuse 16S rRNA gene mcrA reveal ANME ( hosts) three sampling push‐cores from marine cold seep. A total 3725 amplicon sequence variants (ASVs) hosts were detected, classified into 78 genera across 23 phyla. Across all samples, dominant phyla with high relative abundance (>10%) well‐known Euryarchaeota , some bacterial such as Campylobacterota Proteobacteria Chloroflexi ; however, specificity these associations was not verified. addition, compositions significantly different layers, where archaeal increased depths sediments, indicating carriers AOM divergent depth. Furthermore, consensus phylogenetic trees showed congruence archaea bacteria, suggesting horizontal transfer may occur among host members. Finally, metagenomes found contain well other genes that encode enzymes pathway, which prospectively propose existence bacteria. This study describes improvements for potential method studying uncultured functional broadens our understanding ANMEs.
Language: Английский
Citations
1
Advanced Science, Journal Year: 2022, Volume and Issue: 10(5)
Published: Dec. 11, 2022
Methane (CH
Language: Английский
Citations
31
Chemical Geology, Journal Year: 2023, Volume and Issue: 619, P. 121322 - 121322
Published: Jan. 18, 2023
The contamination of groundwater by geogenic arsenic affects the health tens millions people, especially in South and Southeast Asia. primary cause highly reducing alluvial deltaic aquifers Asia, is thought to be microbial reduction Fe(III) As(V) (more mobile) Fe(II) As(III), respectively. Key understanding Fe(III)/As(V) process aquifers, identity source electron donors driving system – this has been a key area research within biogeochemistry last two decades. Studies can broadly divided into three approaches: 1) field-based, which include organic geochemical analysis aquifer samples deduce composition potential sources (by variety techniques proxies), and/or multiple biogeochemical parameters (microbes, genes, inorganic geochemistry) combined with multivariate statistical analysis; 2) microcosm-based, where reductive dissolution mechanism studied laboratory-scale incubation experiments, (including donor type availability) manipulated, effects monitored; 3) in-situ experiments using mineral phases deployed aquifers. Here we review studies aforementioned approaches address questions: (i) What are present aquifers? (ii) environmental donors? (iii) Which have directly implicated release We find that available (and utilised), depend on number site-specific factors, including geomorphological setting, sediment lithology, metabolic communities present. A wide range implicated, dissolved labile matter, methane ammonium. In conclusion, highlight need for further multidisciplinary investigations combine state-of-the-art analyses, mineralogical analyses future studies, ideally conducted in-situ.
Language: Английский
Citations
17
Catalysis Communications, Journal Year: 2023, Volume and Issue: 180, P. 106703 - 106703
Published: June 1, 2023
Catalytic methane decomposition is believed to be an economic and environmental friendly route for the production of COx free hydrogen high quality carbon nanotubes. However, development active stable catalysts remains a significantly challenging research topic. This study focuses on highly silica-supported Fe-based thermal into A series Fe/SiO2 with varying Fe loading in range between 25 wt% 100 were synthesized by solution combustion synthesis (SCS) method. The characterized various bulk sensitive surface analytical tools, such as SEM, XRD, HRTEM, BET Raman spectroscopy. All supported exhibited comparatively activity than unsupported (denoted 100F) catalyst which was least active. Moreover, catalytic terms conversion, rate, growth activities well yields increased increase loading. At operating temperature 650 °C GHSV 8000 h−1, 75FS catalyst, composition 75 wt%Fe/SiO2, demonstrated highest rate 0.75gCH4/g-cat.h among investigated catalysts. Additionally, after achieving initial stability at about 120 min, this remained throughout testing stream 900 min. TEM SEM analysis spent showed that produced multi-walled nanotubes uniform diameters 28 nm Id/Ig ratio 0.454 whereas 100F mainly graphene sheets.
Language: Английский
Citations
17