Alexander Stevenson

Assessing the relative role of zero valent iron and organic substrates in the degradation of chlorinated solvents using ex-situ remediation technologies

In remedial projects with tight timelines or large scopes, ex-situ technologies are often used. A common ex-situ technique is to mix zero valent iron and an organic substrate into the soil and put the soil back in the ground, allowing these amendments to act to degrade contamination long after the soil is returned. In full scale applications, practitioners commonly only worry about contaminant reductions. Questions that are frequently overlooked may include: What is the relative contribution zero valent iron and organic substrates make in contaminant degradation? How long does each actively contribute to contaminant breakdown? Is there an optimal ratio of zero valent iron and organic substrate that can be applied to all sites, or should this ratio be determined for each remedial application? Alex's research will look to answer questions such as these, hopefully resulting in using zero valent iron and organic substrates in ex-situ remediation projects more effectively in the future.

Personal Background

Alex completed his Bachelors from Queen's University with an Honours degree in Biology and furthered his education at Niagara College graduating from the Environmental Management and Assessment graduate program. He then worked as an Environmental Consultant for three years, focusing primarily on large scale monitoring and remediation projects for industrial clients across Alberta and Ontario.