Prof. Kevin J. Wilkinson Group

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Trace metal uptake by aquatic (micro) organisms

The bioavailability of metals depends to a large extent on their chemical speciation in solution. Limits to the thermodynamic models most often used to predict trace metal bioavailability and toxicity have been identified and a chemodynamic approach has been put forward. In order to develop a more fundamental quantitative understanding of trace bioavailability, we are currently evaluating trace element transfer across the membranes of model microorganisms including Chlamydomonas reinhardtii. One aspect of this work involves quantifying the role of competition at transport sites on biouptake fluxes. We are also beginning to evaluate elemental fluxes for organisms embedded in solid matrices (gels, biofilms). Presently, we are especially interested in evaluating the risk of the rare earth metals and of metal mixtures.

Representative Publications

Tan, Q.-G.; Yang, G.; Wilkinson, K. J.,

Biotic ligand model explains the effects of competition but not complexation for Sm biouptake by Chlamydomonas reinhardtii

Chemosphere 2017, 168, 426-434.

Chun-Mei, Z.; Campbell, P. G. C.; Wilkinson, K. J.,

When are metal complexes bioavailable?

Environ Chem 2016, 13, (3), 425-433.

Yang, G.; Tan, Q. G.; Zhu, L.; Wilkinson, K. J.,

The Role of Complexation and Competition in the Biouptake of Europium by a Unicellular Alga

Environ Toxicol Chem 2014, 33(11): 2609–2615

Prof. Kevin J. Wilkinson Group

Français

Prof. Kevin J.

Wilkinson Group