Researcher Profile

Dr. Les Evans

Job Title: Professor
Employer: University of Guelph
Place of Birth: Cardiff, Wales
Further Education: University of Southampton, England (B.Sc.), University of Wales, Aberystwyth (Ph.D.).
Geographic focus of research: Ontario, Manitoba, China

Brief synopsis of current research:
1. Assessing the movement of toxic elements in soils amended with biosolids through the use of batch adsortion experiments and computer modelling.

2. The long term fate and transport of zinc and copper in polluted lakes in the Flin Flon mining area of Manitoba using aqueous speciation models and kinetically derived adsorption models.

3. The attenuation of cadmium, zinc and mercury in natural and constructed wetlands is being investigated using proton binding and complexation models for organic substrates.

Mailing address:
Department of Land Resource Science, University of Guelph. Ontario N1G 2W1
E-mail:
levans@lrs.uoguelph.ca

Recent Publications:

Evans, L.J. 1989. The chemistry of metal retention by soils. Environ. Sci. Technol. 23: 1046-1056.

Bolton, K.A. and L.J. Evans. 1991. Elemental composition and speciation of some landfill leachates with particular reference to cadmium. Water Air Soil Poll. 60: 43-53.

Evans, L.J., G.A. Spiers and Gaoxia Zhao. 1995. Chemical aspects of heavy metal solubility with reference to sewage sludge amended soils. Intern. J. Environ. Anal. Chem. 59: 291-302.

Lumsdon, D.G., L.J.Evans and K.A. Bolton. 1995. The influence of pH and chloride on the retention of zinc, lead, cadmium and mercury by soil. J. Soil Contam. 4: 137-150.

Comments:
The application of aqueous speciation computer models is finding wide application in the remediation of contaminated lakes, sediments and soils. The job prospects for students in the environmental sciences with skills in computer modelliny and environmental chemistry will only grow as more and more polluted sites are remediated.