A5001865962- Geochemistry and Elemental Analysis
- Microbial Fuel Cells and Bioremediation
- Advanced Nanomaterials in Catalysis
- Nanoparticles: synthesis and applications
- Radioactive contamination and transfer
- Chromium effects and bioremediation
- Radioactive element chemistry and processing
- Nanomaterials for catalytic reactions
- Heavy metals in environment
- Nuclear and radioactivity studies
- Click Chemistry and Applications
- Innovative Microfluidic and Catalytic Techniques Innovation
- Metal Extraction and Bioleaching
- Nanocluster Synthesis and Applications
- Spectroscopy Techniques in Biomedical and Chemical Research
- Electrokinetic Soil Remediation Techniques
- Nuclear physics research studies
- Salmonella and Campylobacter epidemiology
- Vibrio bacteria research studies
- Radioactivity and Radon Measurements
- Environmental DNA in Biodiversity Studies
- Nuclear Physics and Applications
- Bone Tissue Engineering Materials
- Mine drainage and remediation techniques
- Advanced Photocatalysis Techniques
University of Manchester
2010-2024
University of Vienna
2016-2023
Williams (United States)
2017
Diamond Light Source
2010
Manchester Royal Infirmary
2010
Lawrence Berkeley National Laboratory
2010
Abstract Copper nanoparticles (Cu‐NPs) have a wide range of applications as heterogeneous catalysts. In this study, novel green biosynthesis route for producing Cu‐NPs using the metal‐reducing bacterium, Shewanella oneidensis is demonstrated. Thin section transmission electron microscopy shows that are predominantly intracellular and present in typical size 20–40 nm. Serial block‐face scanning demonstrates well‐dispersed across 3D structure cells. X‐ray absorption near‐edge spectroscopy...
The influence of Fe(III) starting material on the ability magnetically recoverable biogenic magnetites produced by Geobacter sulfurreducens to retain metal oxyanion contaminants has been investigated. reduction/removal aqueous Cr(VI) was used probe reactivity biomagnetites. Nanomagnetites bacterial reduction schwertmannite powder were more efficient at reducing than either ferrihydrite "gel"-derived biomagnetite or commercial nanoscale Fe3O4. Examination post-exposure magnetite surfaces...
Stable mercury (Hg) isotope ratios are an emerging tracer for biogeochemical transformations in environmental systems, but their application requires knowledge of isotopic enrichment factors individual processes. We investigated Hg fractionation during dark, abiotic reduction Hg(II) by dissolved iron(Fe)(II), magnetite, and Fe(II) sorbed to boehmite or goethite analyzing both the reactants products laboratory experiments. For homogeneous continuously purged reactors, results followed a...
The fate of As(V) during microbial reduction by Geobacter sulfurreducens Fe(III) in synthetic arsenic-bearing schwertmannites has been investigated. During incubation at pH7, the rate biological increased with increasing initial arsenic concentration. From a relatively low content (<0.3 wt %), only magnetite was formed as result dissimilatory iron reduction. However, bioreduction higher concentrations (>0.79 %) resulted formation goethite. At no stage process did concentration solution...
The biosynthesis of Pd nanoparticles supported on microorganisms (bio-Pd) is achieved via the enzymatic reduction Pd(II) to Pd(0) under ambient conditions using inexpensive buffers and electron donors, like organic acids or hydrogen. Sustainable bio-Pd catalysts are effective for C-C coupling hydrogenation reactions, but their industrial application limited by challenges in controlling nanoparticle properties. Here, metal-reducing bacterium Geobacter sulfurreducens, it demonstrated that...
It is clear that investigating how bacterial cells work by analysing their functional roles in microbial communities very important environmental, clinical and industrial microbiology. The benefits of linking genes to respective functions include the reliable identification causative agents various diseases, which would permit appropriate timely treatment healthcare systems. In municipal wastewater management, such knowledge may allow for manipulation communities, as through bioaugmentation,...
SERS was developed for intercellular and intracellular analyses. Using a series of cell wall mutants in <italic>C. jejuni</italic> we show <italic>versus</italic> cytoplasm differences.
Biogenic magnetite nanoparticles were employed to recover copper from whisky distillery wastewaters, generating an efficient and reusable click chemistry catalyst.
Biomineralization of Cu has been shown to control contaminant dynamics and transport in soils. However, very little is known about the role that subsurface microorganisms may play biogeochemical cycling Cu. In this study, we investigate bioreduction Cu(II) by metal-reducing bacterium Geobacter sulfurreducens Rapid removal from solution was observed cell suspensions G. when supplied, while transmission electron microscopy (TEM) analyses showed formation electron-dense nanoparticles associated...
The efficiency of chelating ligands in mobilizing metals from soils and sediments is generally examined under conditions remote those which they are exuded or applied the field. This may lead to incorrect estimations efficiency. aim this study was establish influence soil solution ratio (SSR) pre-equilibration with electrolyte on metal mobilization displacement. For purpose a series interaction experiments calcareous clay biogenic agent, phytosiderophore 2'-deoxymugineic acid (DMA) were...
Summary Bimetallic nanoparticle catalysts have attracted considerable attention due to their unique chemical and physical properties. The ability of metal‐reducing bacteria produce highly catalytically active monometallic nanoparticles is well known; however, the properties catalytic activity bimetallic synthesized with these organisms not understood. Here, we report one‐pot biosynthesis Pd/Ag (bio‐Pd/Ag) Pd/Au (bio‐Pd/Au) using bacterium, Shewanella oneidensis , under mild conditions....
Magnetite is the most abundant magnetic iron mineral on Earth’s surface. Its formation in natural ecosystems mainly due to microbial activity. Microbially synthesized magnetite, commonly called “biogenic magnetite,” has many beneficial properties for a wide range of environmental and commercial applications. high surface reactivity facilitates interactions with (in)organic pollutants anthropic ecosystems, as well reagents industrial catalysis. Due its good biocompatibility, biogenic...
Abstract Understanding the biogeochemical behaviour of actinides in environment is essential for longterm stewardship radionuclide contaminated land. Plutonium particular concern due its high radiotoxicity, long half-life and complex chemistry, with these factors contributing to limited literature available on environmental behaviour. Here, we investigate biogeochemistry Pu soil as microbial processes have potential mobilize through numerous mechanisms including reduction Pu(IV) potentially...
The biosynthesis of palladium nanoparticles supported on microbial cells (bio-Pd) has attracted much recent interest, but the effect solution chemistry process remains poorly understood. Biological buffers can be used to maintain physiological pH during bioreduction Pd(II) Pd(0) by cells, however, buffer components have potential complex Pd(II), and this may affect subsequent microbe-metal interaction. In study, a range salts biological were selected assess impact rate Geobacter...
Abstract Microorganisms can facilitate the reduction of Cu 2+ , altering its speciation and mobility in environmental systems producing Cu‐based nanoparticles with useful catalytic properties. However, only a few model organisms have been studied relation to bioreduction little work has carried out on microbes from Cu‐contaminated environments. This study aimed enrich for Cu‐resistant soil explore their potential biomineralisation solution. We show that an enrichment grown Cu‐amended medium,...
Understanding the biogeochemical behaviour and potential mobility of actinides in soils groundwater is vital for developing remediation management strategies radionuclide-contaminated land. Pu known to have a high Kd sediments, however remobilization low concentrations remains concern. Here, some physicochemical properties co-contaminant, Am, are investigated contaminated from Aldermaston, Berkshire, UK, Esk Estuary, Cumbria, determine their mobility. Sequential extraction techniques were...