Accession Number:

ADA489006

Title:

Capacities of Candidate Herbaceous Plants for Phytoremediation of Soil-based TNT and RDX on Ranges

Descriptive Note:

Final rept.

Corporate Author:

ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS ENVIRONMENTAL LAB

Report Date:

2008-09-01

Pagination or Media Count:

97.0

Abstract:

This report describes a study to quantify the phytoextraction and phytostabilization capacities of TNT and RDX from spiked soil in selected herbaceous species, while paying attention to storage and quality of breakdown products in vegetative plant parts. Ten plant species were included in the experiments. Dose-response experiments formed the basis for evaluating the uptake and tentative in-plant degradation of the soil-based energetics and biomass characteristics of the plants. In these experiments, plants were exposed for periods ranging from 55 to 83 days in the greenhouse, biomass and evapotranspiration characteristics were determined, and residues of explosives parent compounds and metabolites were analyzed using HPLC techniques. Of the ten plant species tested, two grasses and four forbs were classified as TNT-tolerant. Total TNT loss from soil by processes other than plant TNT uptake ranged from 18.4 to 33.2 kg TNTha in grasses and forbs, respectively. Plant TNT uptake ranged from 0.2 kgha in grasses to close to none in forbs. Four grasses took up and metabolized TNT, and one forb showed some potential for TNT uptake and metabolism. All plant species were classified as RDX-tolerant. Total RDX loss from soil by processes other than plant RDX uptake ranged from 8.2 to 437 kg RDXha in grasses and forbs, respectively. Plant RDX uptake ranged from 3.4 kgha in grasses to 6.4 kgha in forbs. Four grasses and one forb metabolized RDX. Two plant species were recommended for further exploration of their phytoextractionplant-assisted phytoremediation capacity, both species of the uptakerdegrader type. Three other species were recommended for further exploration of their phytostabilizationplant-assisted phytoremediation capacity.

Subject Categories:

  • Biology
  • Ammunition and Explosives
  • Biochemistry
  • Logistics, Military Facilities and Supplies

Distribution Statement:

APPROVED FOR PUBLIC RELEASE