Jon Lloyd (microbiologist)

Last updated
Jonathan Richard Lloyd
Scientific career
FieldsMicrobiology, radiochemistry
InstitutionsThe University of Manchester
Thesis The physiological state of microbial cells immobilised in hollow-fibre membrane bioreactors

Jonathan Richard Lloyd is a professor of geomicrobiology and director of the Williamson Research Centre for Molecular Environmental Science, and is based in the Department of Earth and Environmental Sciences at the University of Manchester. [1] His research is based at the interface between microbiology, geology and chemistry. [2] His research focuses on the mechanisms of microbial metal-reduction, with emphasis on the environmental impact and biotechnological applications of metal-reducing bacteria. Some of the contaminants he studies include As, Tc, Sr, U, Np and Pu. [3] [4] [5] [6] [7] [8] [9] Current activities are supported by funds from NERC, BBSRC, EPSRC (The Engineering and Physical Sciences Research Council), the EU and industry. Lloyd is also a senior visiting fellow at the National Nuclear Laboratory, which helps support the development of a nuclear geomicrobiology programme.

Contents

Education

Lloyd was born in Hemel Hempstead UK in 1966. He holds a BSc(Hons) Applied Biology from the University of Bath, following this Lloyd read his PhD in Microbiology at the University of Kent. He completed his thesis titled: The physiological state of microbial cells immobilised in hollow-fibre membrane bioreactors in 1993. [10]

Research and career

Lloyd has published more than 250 papers that focus on understanding how microbes interact with, and control the chemistry of the subsurface, and how natural microbial processes and microbial metabolisms can be harnessed for a wide range of biotechnological applications. [4] [11] His publications have featured in nature, ES&T, Chemical Geology, Mineralogical Magazine, and Science of the Total Environment. [4] [7] [8] [6] [12] [11] His research has investigated the role of U(V) during U(VI) bioreduction by Fe(III)-reducing bacteria Geobacter sulfurreducens and Shewanella oneidensis MR1. [8] [7] [13] Lloyd has also led investigations into microbial activities under highly alkaline conditions such as those that would be found in a geological disposal facility, [14] [12] or those found in Nuclear legacy cooling ponds. [11] [15] [16]

Major reviews

  1. Newsome, Laura; Morris, Katherine; Lloyd, Jonathan R. (January 2014). "The biogeochemistry and bioremediation of uranium and other priority radionuclides". Chemical Geology. 363: 164–184. Bibcode:2014ChGeo.363..164N. doi: 10.1016/j.chemgeo.2013.10.034 .
  2. Renshaw, Joanna C.; Lloyd, Jonathon R.; Livens, Francis R. (October 2007). "Microbial interactions with actinides and long-lived fission products". Comptes Rendus Chimie. 10 (10–11): 1067–1077. doi:10.1016/j.crci.2007.02.013.
  3. Lloyd, Jonathan R. (June 2003). "Microbial reduction of metals and radionuclides". FEMS Microbiology Reviews. 27 (2–3): 411–425. doi: 10.1016/S0168-6445(03)00044-5 . PMID   12829277.
  4. Lloyd, J. R.; Chesnes, J.; Glasauer, S.; Bunker, D. J.; Livens, F. R.; Lovley, D. R. (January 2002). "Reduction of Actinides and Fission Products by Fe(III)-Reducing Bacteria". Geomicrobiology Journal. 19 (1): 103–120. doi:10.1080/014904502317246200. S2CID   98661795.
  5. Lloyd, Jonathan R; Lovley, Derek R (June 2001). "Microbial detoxification of metals and radionuclides". Current Opinion in Biotechnology. 12 (3): 248–253. doi:10.1016/s0958-1669(00)00207-x. PMID   11404102.

Awards and honours

Lloyd was awarded the 2006 Geological Society of London Bigsby Medal, the 2018 Schlumberger Medal of the Mineralogical Society of Great Britain and Ireland, and in 2014 was cited as one of the Top 100 Practicing UK Scientists by the UK Science Council.  From 2010 to 2014 he was a Royal Society Industrial Fellow, and from 2015 to 2020 a Royal Society Wolfson Fellowship Award holder. [17]

Related Research Articles

<span class="mw-page-title-main">Geomicrobiology</span> Intersection of microbiology and geology

Geomicrobiology is the scientific field at the intersection of geology and microbiology and is a major subfield of geobiology. It concerns the role of microbes on geological and geochemical processes and effects of minerals and metals to microbial growth, activity and survival. Such interactions occur in the geosphere, the atmosphere and the hydrosphere. Geomicrobiology studies microorganisms that are driving the Earth's biogeochemical cycles, mediating mineral precipitation and dissolution, and sorbing and concentrating metals. The applications include for example bioremediation, mining, climate change mitigation and public drinking water supplies.

<span class="mw-page-title-main">Bioremediation</span> Process used to treat contaminated media such as water and soil

Bioremediation broadly refers to any process wherein a biological system, living or dead, is employed for removing environmental pollutants from air, water, soil, flue gasses, industrial effluents etc., in natural or artificial settings. The natural ability of organisms to adsorb, accumulate, and degrade common and emerging pollutants has attracted the use of biological resources in treatment of contaminated environment. In comparison to conventional physicochemical treatment methods bioremediation may offer considerable advantages as it aims to be sustainable, eco-friendly, cheap, and scalable. Most bioremediation is inadvertent, involving native organisms. Research on bioremediation is heavily focused on stimulating the process by inoculation of a polluted site with organisms or supplying nutrients to promote the growth. In principle, bioremediation could be used to reduce the impact of byproducts created from anthropogenic activities, such as industrialization and agricultural processes. Bioremediation could prove less expensive and more sustainable than other remediation alternatives.

Anaerobic respiration is respiration using electron acceptors other than molecular oxygen (O2). Although oxygen is not the final electron acceptor, the process still uses a respiratory electron transport chain.

In organochlorine chemistry, reductive dechlorination describes any chemical reaction which cleaves the covalent bond between carbon and chlorine via reductants, to release chloride ions. Many modalities have been implemented, depending on the application. Reductive dechlorination is often applied to remediation of chlorinated pesticides or dry cleaning solvents. It is also used occasionally in the synthesis of organic compounds, e.g. as pharmaceuticals.

<span class="mw-page-title-main">Rio Tinto (river)</span> River in Spain

The Río Tinto is a river in southwestern Spain that rises in the Sierra Morena mountains of Andalusia. It flows generally south-southwest, reaching the Gulf of Cádiz at Huelva. The Rio Tinto river has a unique red and orange colour derived from its chemical makeup that is extremely acidic and with very high levels of iron and heavy metals.

<i>Geobacter</i> Genus of anaerobic bacteria found in soil

Geobacter is a genus of bacteria. Geobacter species are anaerobic respiration bacterial species which have capabilities that make them useful in bioremediation. Geobacter was found to be the first organism with the ability to oxidize organic compounds and metals, including iron, radioactive metals, and petroleum compounds into environmentally benign carbon dioxide while using iron oxide or other available metals as electron acceptors. Geobacter species are also found to be able to respire upon a graphite electrode. They have been found in anaerobic conditions in soils and aquatic sediment.

<span class="mw-page-title-main">Biomineralization</span> Process by which living organisms produce minerals

Biomineralization, also written biomineralisation, is the process by which living organisms produce minerals, often to harden or stiffen existing tissues. Such tissues are called mineralized tissues. It is an extremely widespread phenomenon; all six taxonomic kingdoms contain members that are able to form minerals, and over 60 different minerals have been identified in organisms. Examples include silicates in algae and diatoms, carbonates in invertebrates, and calcium phosphates and carbonates in vertebrates. These minerals often form structural features such as sea shells and the bone in mammals and birds.

In biology, syntrophy, synthrophy, or cross-feeding is the phenomenon of one species feeding on the metabolic products of another species to cope up with the energy limitations by electron transfer. In this type of biological interaction, metabolite transfer happens between two or more metabolically diverse microbial species that live in close proximity to each other. The growth of one partner depends on the nutrients, growth factors, or substrates provided by the other partner. Thus, syntrophism can be considered as an obligatory interdependency and a mutualistic metabolism between two different bacterial species.

<i>Shewanella</i> Genus of bacteria

Shewanella is the sole genus included in the marine bacteria family Shewanellaceae. Some species within it were formerly classed as Alteromonas. Shewanella consists of facultatively anaerobic Gram-negative rods, most of which are found in extreme aquatic habitats where the temperature is very low and the pressure is very high. Shewanella bacteria are a normal component of the surface flora of fish and are implicated in fish spoilage. Shewanella chilikensis, a species of the genus Shewanella commonly found in the marine sponges of Saint Martin's Island of the Bay of Bengal, Bangladesh.

<span class="mw-page-title-main">Bacterial nanowires</span> Electrically conductive appendages produced by a number of bacteria

Bacterial nanowires are electrically conductive appendages produced by a number of bacteria most notably from the Geobacter and Shewanella genera. Conductive nanowires have also been confirmed in the oxygenic cyanobacterium Synechocystis PCC6803 and a thermophilic, methanogenic coculture consisting of Pelotomaculum thermopropionicum and Methanothermobacter thermoautotrophicus. From physiological and functional perspectives, bacterial nanowires are diverse. The precise role microbial nanowires play in their biological systems has not been fully realized, but several proposed functions exist. Outside of a naturally occurring environment, bacterial nanowires have shown potential to be useful in several fields, notably the bioenergy and bioremediation industries.

<span class="mw-page-title-main">Zetaproteobacteria</span> Class of bacteria

The class Zetaproteobacteria is the sixth and most recently described class of the Pseudomonadota. Zetaproteobacteria can also refer to the group of organisms assigned to this class. The Zetaproteobacteria were originally represented by a single described species, Mariprofundus ferrooxydans, which is an iron-oxidizing neutrophilic chemolithoautotroph originally isolated from Kamaʻehuakanaloa Seamount in 1996 (post-eruption). Molecular cloning techniques focusing on the small subunit ribosomal RNA gene have also been used to identify a more diverse majority of the Zetaproteobacteria that have as yet been unculturable.

<span class="mw-page-title-main">Microbiologically induced calcite precipitation</span>

Microbiologically induced calcium carbonate precipitation (MICP) is a bio-geochemical process that induces calcium carbonate precipitation within the soil matrix. Biomineralization in the form of calcium carbonate precipitation can be traced back to the Precambrian period. Calcium carbonate can be precipitated in three polymorphic forms, which in the order of their usual stabilities are calcite, aragonite and vaterite. The main groups of microorganisms that can induce the carbonate precipitation are photosynthetic microorganisms such as cyanobacteria and microalgae; sulfate-reducing bacteria; and some species of microorganisms involved in nitrogen cycle. Several mechanisms have been identified by which bacteria can induce the calcium carbonate precipitation, including urea hydrolysis, denitrification, sulfate production, and iron reduction. Two different pathways, or autotrophic and heterotrophic pathways, through which calcium carbonate is produced have been identified. There are three autotrophic pathways, which all result in depletion of carbon dioxide and favouring calcium carbonate precipitation. In heterotrophic pathway, two metabolic cycles can be involved: the nitrogen cycle and the sulfur cycle. Several applications of this process have been proposed, such as remediation of cracks and corrosion prevention in concrete, biogrout, sequestration of radionuclides and heavy metals.

Geobacter metallireducens is a gram-negative metal-reducing proteobacterium. It is a strict anaerobe that oxidizes several short-chain fatty acids, alcohols, and monoaromatic compounds with Fe(III) as the sole electron acceptor. It can also use uranium for its growth and convert U(VI) to U(IV).

<i>Geobacter sulfurreducens</i> Species of bacterium

Geobacter sulfurreducens is a gram-negative metal and sulphur-reducing proteobacterium. It is rod-shaped, aerotolerant anaerobe, non-fermentative, has flagellum and type four pili, and is closely related to Geobacter metallireducens. Geobacter sulfurreducens is an anaerobic species of bacteria that comes from the family of bacteria called Geobacteraceae. Under the genus of Geobacter, G. sulfurreducens is one out of twenty different species. The Geobacter genus was discovered by Derek R. Lovley in 1987. G. sulfurreducens was first isolated in Norman, Oklahoma, USA from materials found around the surface of a contaminated ditch.

Geopsychrobacter electrodiphilus is a species of bacteria, the type species of its genus. It is a psychrotolerant member of its family, capable of attaching to the anodes of sediment fuel cells and harvesting electricity by oxidation of organic compounds to carbon dioxide and transferring the electrons to the anode.

Dissimilatory metal-reducing microorganisms are a group of microorganisms (both bacteria and archaea) that can perform anaerobic respiration utilizing a metal as terminal electron acceptor rather than molecular oxygen (O2), which is the terminal electron acceptor reduced to water (H2O) in aerobic respiration. The most common metals used for this end are iron [Fe(III)] and manganese [Mn(IV)], which are reduced to Fe(II) and Mn(II) respectively, and most microorganisms that reduce Fe(III) can reduce Mn(IV) as well. But other metals and metalloids are also used as terminal electron acceptors, such as vanadium [V(V)], chromium [Cr(VI)], molybdenum [Mo(VI)], cobalt [Co(III)], palladium [Pd(II)], gold [Au(III)], and mercury [Hg(II)].

<span class="mw-page-title-main">Frederick Colwell</span>

Frederick (Rick) Colwell is a microbial ecologist specializing in subsurface microbiology and geomicrobiology. He is a professor of ocean ecology and biogeochemistry at Oregon State University, and an adjunct and affiliate faculty member at Idaho State University.

Geobacter uraniireducens is a gram-negative, rod-shaped, anaerobic, chemolithotrophic, mesophilic, and motile bacterium from the genus of Geobacter. G. uraniireducens has been found to reduce iron and uranium in sediment and soil. It is being studied for use in bioremediation projects due to its ability to reduce uranium and arsenic.

<span class="mw-page-title-main">Microbial oxidation of sulfur</span>

Microbial oxidation of sulfur is the oxidation of sulfur by microorganisms to build their structural components. The oxidation of inorganic compounds is the strategy primarily used by chemolithotrophic microorganisms to obtain energy to survive, grow and reproduce. Some inorganic forms of reduced sulfur, mainly sulfide (H2S/HS) and elemental sulfur (S0), can be oxidized by chemolithotrophic sulfur-oxidizing prokaryotes, usually coupled to the reduction of oxygen (O2) or nitrate (NO3). Anaerobic sulfur oxidizers include photolithoautotrophs that obtain their energy from sunlight, hydrogen from sulfide, and carbon from carbon dioxide (CO2).

<span class="mw-page-title-main">Gemma Reguera</span> Spanish-American microbiologist

Gemma Reguera is a Spanish-American microbiologist and professor at Michigan State University. She is the editor-in-chief of the journal Applied and Environmental Microbiology and was elected fellow of the American Academy of Microbiology in 2019. She is the recipient of the 2022 Alice C. Evans Award for Advancement of Women from the American Society for Microbiology. Her lab's research is focused on electrical properties of metal-reducing microorganisms.

References

  1. "Prof Jonathan Lloyd | The University of Manchester". www.research.manchester.ac.uk. Retrieved 2020-05-06.
  2. "Prof Jonathan Lloyd - Publications | The University of Manchester". www.research.manchester.ac.uk. Retrieved 2020-10-13.
  3. Lloyd, J R; Cole, J A; Macaskie, L E (March 1997). "Reduction and removal of heptavalent technetium from solution by Escherichia coli". Journal of Bacteriology. 179 (6): 2014–2021. doi:10.1128/jb.179.6.2014-2021.1997. PMC   178927 . PMID   9068649.
  4. 1 2 3 Islam, Farhana S.; Gault, Andrew G.; Boothman, Christopher; Polya, David A.; Charnock, John M.; Chatterjee, Debashis; Lloyd, Jonathan R. (July 2004). "Role of metal-reducing bacteria in arsenic release from Bengal delta sediments". Nature. 430 (6995): 68–71. Bibcode:2004Natur.430...68I. doi:10.1038/nature02638. PMID   15229598. S2CID   4399444.
  5. Lloyd, J. R.; Sole, V. A.; Van Praagh, C. V. G.; Lovley, D. R. (September 2000). "Direct and Fe(II)-Mediated Reduction of Technetium by Fe(III)-Reducing Bacteria". Applied and Environmental Microbiology. 66 (9): 3743–3749. Bibcode:2000ApEnM..66.3743L. doi:10.1128/AEM.66.9.3743-3749.2000. PMC   92215 . PMID   10966385.
  6. 1 2 Thorpe, Clare L.; Lloyd, Jonathan R.; Law, Gareth T.W.; Burke, Ian T.; Shaw, Samuel; Bryan, Nicholas D.; Morris, Katherine (May 2012). "Strontium sorption and precipitation behaviour during bioreduction in nitrate impacted sediments". Chemical Geology. 306–307: 114–122. Bibcode:2012ChGeo.306..114T. doi: 10.1016/j.chemgeo.2012.03.001 .
  7. 1 2 3 Renshaw, Joanna C.; Butchins, Laura J. C.; Livens, Francis R.; May, Iain; Charnock, John M.; Lloyd, Jonathan R. (August 2005). "Bioreduction of Uranium: Environmental Implications of a Pentavalent Intermediate". Environmental Science & Technology. 39 (15): 5657–5660. Bibcode:2005EnST...39.5657R. doi:10.1021/es048232b. PMID   16124300.
  8. 1 2 3 Vettese, Gianni F.; Morris, Katherine; Natrajan, Louise S.; Shaw, Samuel; Vitova, Tonya; Galanzew, Jurij; Jones, Debbie L.; Lloyd, Jonathan R. (18 February 2020). "Multiple Lines of Evidence Identify U(V) as a Key Intermediate during U(VI) Reduction by Shewanella oneidensis MR1". Environmental Science & Technology. 54 (4): 2268–2276. Bibcode:2020EnST...54.2268V. doi: 10.1021/acs.est.9b05285 . PMID   31934763.
  9. Kimber, R. L.; Boothman, C.; Purdie, P.; Livens, F. R.; Lloyd, J. R. (June 2012). "Biogeochemical behaviour of plutonium during anoxic biostimulation of contaminated sediments". Mineralogical Magazine. 76 (3): 567–578. Bibcode:2012MinM...76..567K. doi:10.1180/minmag.2012.076.3.08. S2CID   94949899.
  10. Lloyd, Jonathan Richard (1993). The physiological state of microbial cells immobilised in hollow-fibre membrane bioreactors (Thesis).
  11. 1 2 3 Foster, Lynn; Boothman, Christopher; Ruiz-Lopez, Sharon; Boshoff, Genevieve; Jenkinson, Peter; Sigee, David; Pittman, Jon K.; Morris, Katherine; Lloyd, Jonathan R. (June 2020). "Microbial bloom formation in a high pH spent nuclear fuel pond". Science of the Total Environment. 720: 137515. Bibcode:2020ScTEn.720m7515F. doi:10.1016/j.scitotenv.2020.137515. PMID   32325573.
  12. 1 2 Bassil, Naji M.; Bewsher, Alastair D.; Thompson, Olivia R.; Lloyd, Jonathan R. (November 2015). "Microbial degradation of cellulosic material under intermediate-level waste simulated conditions". Mineralogical Magazine. 79 (6): 1433–1441. Bibcode:2015MinM...79.1433B. doi: 10.1180/minmag.2015.079.6.18 . S2CID   55220400.
  13. Jones, Debbie L.; Andrews, Michael B.; Swinburne, Adam N.; Botchway, Stanley W.; Ward, Andrew D.; Lloyd, Jonathan R.; Natrajan, Louise S. (2015). "Fluorescence spectroscopy and microscopy as tools for monitoring redox transformations of uranium in biological systems". Chemical Science. 6 (9): 5133–5138. doi:10.1039/c5sc00661a. PMC   5666681 . PMID   29142731.
  14. Bassil, Naji M; Small, Joe S; Lloyd, Jonathan R (1 July 2020). "Enhanced microbial degradation of irradiated cellulose under hyperalkaline conditions". FEMS Microbiology Ecology. 96 (7): fiaa102. doi:10.1093/femsec/fiaa102. PMC   7329180 . PMID   32459307.
  15. Neill, Thomas S.; Morris, Katherine; Pearce, Carolyn I.; Abrahamsen-Mills, Liam; Kovarik, Libor; Kellet, Simon; Rigby, Bruce; Vitova, Tonya; Schacherl, Bianca; Shaw, Samuel (December 2019). "Silicate stabilisation of colloidal UO2 produced by uranium metal corrosion". Journal of Nuclear Materials. 526: 151751. Bibcode:2019JNuM..52651751N. doi: 10.1016/j.jnucmat.2019.151751 .
  16. Foster, Lynn; Muhamadali, Howbeer; Boothman, Christopher; Sigee, David; Pittman, Jon K.; Goodacre, Royston; Morris, Katherine; Lloyd, Jonathan R. (7 April 2020). "Radiation Tolerance of Pseudanabaena catenata, a Cyanobacterium Relevant to the First Generation Magnox Storage Pond". Frontiers in Microbiology. 11: 515. doi: 10.3389/fmicb.2020.00515 . PMC   7154117 . PMID   32318035. S2CID   214807317.
  17. "Prof Jonathan Lloyd - Prizes | The University of Manchester". www.research.manchester.ac.uk. Retrieved 2020-10-13.