Project Abstract

Plant Enzyme Systems for the Phytoremediation of Chlorinated Aliphatics in Contaminated Soils

Principal Investigators

J.L. Schnoor
University of Iowa
E-mail: jschnoor@cgrer.uiowa.edu

Craig Just
University of Iowa
E-mail: craig-just@uiowa.edu

Goal

The goal of this project is to determine the feasibility of using plants to remediate soils contaminated with chlorinated aliphatic compounds by studying their uptake, translocation, and resulting metabolites and by investigating plant enzyme capabilities to degrade these compounds.

Rationale

Based on our previous research, we understand that there are several potential mechanisms for the uptake and transformations of TCE in a plant-soil system.

Approach

Investigators will research potential mechanisms and the feasibility of phytoremediation to enhance the cleanup of TCE-contaminated sites. Studies will examine the uptake of TCE or its metabolites into the roots, the xylem transfer of the compounds to the leaves, volatilization from the leaves, foliar uptake of TCE from air, phloem transfer, and bound residue formation throughout the plant.

Status

Progress has been made on determining uptake, translocation, and accumulation of TCE in plants. Volatilization rates of TCE through poplar cuttings compared to soil volatilization were determined. Potential metabolites contained in soil, poplar tissues, and volatilized air are being investigated and phytotoxicity studies will continue. This project is in its second year.

Clients/Users

Anyone involved with the cleanup of sites contaminated with TCE. The U.S. Air Force has shown particular interest.

Keywords

Plant enzyme systems, chlorinated aliphatic compounds, TCE, phytoremediation.