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Project directory according to Nr.3.2 BNBest-BMBF98 <http://www.fz-juelich.de/ptj/datapool/page/490/Schlussbericht.rtf> 4 Scientific and technical conditions at the start of the projectInitial scientific situationContrary to results with herbaceous plants, the phytoremediation potential of trees (dendroremediation potential) for sanitation of explosive contaminated soils was examined only in a few cases. The first evidence for TNT uptake by trees was found in experiments with juvenile, rooted hardwood cuttings of various willow clones (Salix spec., e.g. fig. 2 ) and hybrid poplars ( Populus spec.) in our previous project (Schoenmuth 1996 (pdf) [ # Lit. 5 ] , Schoenmuth et al. 1997a (pdf)[ # Lit. 7 ] , Schoenmuth et al. 1997b (pdf) [ # Lit. 8 ]. There, TNT was mainly found in form of its primary reduction products 4-amino-2,6-dinitrotoluene (4-ADNT) and 2-amino-4,6-dinitrotoluene (2-ADNT) in the tree tissue and it TNT or ADNTs were, at least temporarily, accumulated in the root (see fig. 2: TNT uptake of hybrid Salix EW-27). These results were later confirmed with juvenile, freshly rooted poplar hardwood cuttings by Thompson et al. 1998 [ # Lit. 9 ] using [14C]-labelled 2,4,6-trinitrotoluene. At
the time of finishing the report, no further results about the metabolic TNT
degradation potential of mature
deciduous trees or mature coniferous tree are available from literature. Information and documentation servicesBeside literature data, listed in the project request of 1997(pdf) [ # Lit. 6 ] , preferably the InterNet and the BBA-own search possibilities for the information were used. A provisional list of the used literature (http://www.dendroremediation.de/bericht2002/biblio/index.htm) contains approx. 1,000 records and is downloadable from the file references-2002.pdf (586 KB).last
updated: 18.02.04 19:41 by Bernd
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