I specialize in research on the biological transformation of hazardous substances in sediment, groundwater, and wastewater.  I am particularly interested in how external environmental factors influence the biodegradation of these substances.  This is of critical importance in designing and implementing biologically-based remediation systems and using microorganisms to treat wastewater.  I work both in the laboratory and in the field, trying to understand the interactions between microorganisms and environmental conditions (such as electron donor type or concentration and redox state).  Field work that I have been involved with has focused on implementing remediation technologies that alter environmental conditions and thereby stimulate beneficial biological activity..
Our current efforts are focused on:
    -PCB dechlorinators
    -The natural role of dehalorespirers in the environment
    -The fate of estrogenic compounds in wastewater
    -Reactive membrane systems
    -Sensor networks to monitor and predict stream water quality