Geomicrobiology Group

Transformations of metals and minerals by microorganisms, bioweathering, and bioremediation

The Geomicrobiology Group carries out research on the geoactive properties of microorganisms in order to understand their importance in key biosphere processes and their applied potential.

The prime focus is on metal-mineral transformations with most research under the heading of geomycology, the roles of fungi as geoactive agents.

We are particularly interested in understanding:

• physiological and morphological responses to toxic metals and mineral substrates
• mechanisms of mineral dissolution
• the formation of novel mycogenic biominerals, especially carbonates, phosphates, oxides and oxalates

Research of applied significance that builds on our fundamental research includes:

• the application of metal-mineral-microbe transformations for bioremediation of metals, metalloids and radionuclides
• nuclear decommissioning
• biofertilizers (phosphate release)
• the production of mineral-based biomaterials

We are also interested in:

• the biodeterioration of rock and mineral-based structural materials including concrete and cultural artefacts
• biocorrosion of metals

Research on the functional consequences and mathematical modelling of fungal growth in heterogeneous environments is carried out with Dr Fordyce Davidson, Division of Mathematics.

Previous research has also included work with aerobic and anaerobic bacteria, cyanobacteria and microalgae in relation to toxic metal accumulation, metal bioprecipitation, and investigation of the responses of soil microbial communities to metals and organic pollutants.

We are also affiliated to the Division of Molecular Microbiology.

Image credit: a lanthanum oxalate biomineral produced by the soil fungus Aspergillus niger  (image by Xia Kang)