Journal article
Leaching of contaminated leaves following uptake and phytoremediation of RDX, HMX, and TNT by poplar
International Journal of Phytoremediation, Vol.8(1), pp.81-94
2006
DOI: 10.1080/15226510500507128
Abstract
The uptake and fate of 2,4,6-trinitrotoluene (TNT), hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX), and octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX) by hybrid poplars in hydroponic systems were compared and exposed leaves were leached with water to simulate potential exposure pathways from groundwater in the field. TNT was removed from solution more quickly than nitramine explosives. Most of radioactivity remained in root tissues for 14C-TNT, but in leaves for 14C-RDX and 14C-HMX. Radiolabel recovery for TNT and HMX was over 94%, but that of RDX decreased over time, suggesting a loss of volatile products. A considerable fraction (45.5%) of radioactivity taken up by whole plants exposed to 14C-HMX was released into deionized water, mostly as parent compound after 5 d of leaching. About a quarter (24.0%) and 1.2% were leached for RDX and TNT, respectively, mostly as transformed products. Leached radioactivity from roots was insignificant in all cases (< 2%). This is the first report in which small amounts of transformation products of RDX leach from dried leaves following uptake by poplars. Such behavior for HMX was reported earlier and is reconfirmed here. All three compounds differ substantially in their fate and transport during the leaching process.
Details
- Title: Subtitle
- Leaching of contaminated leaves following uptake and phytoremediation of RDX, HMX, and TNT by poplar
- Creators
- Jong Moon YoonBenoit Van AkenJerald L. Schnoor - University of Iowa
- Resource Type
- Journal article
- Publication Details
- International Journal of Phytoremediation, Vol.8(1), pp.81-94
- DOI
- 10.1080/15226510500507128
- ISSN
- 1522-6514
- Language
- English
- Date published
- 2006
- Academic Unit
- Civil and Environmental Engineering; Occupational and Environmental Health
- Record Identifier
- 9983557376502771
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