160

RDX

140

120

100

80

60

HMX

40

nitroso-RDX

20

0

2

4

6

8

10

12

14

16

18

20

0

22

Leachate Volume (I)

Figure 2. Cumulative mass of analytes leached from pots containing con-

taminated tissues.

nitroso-RDX were recovered in the leachate. Most

ing both solvent extraction and base/acid hydrol-

of the TNT was taken up by the plants or trans-

ysis. Approximately 14% of the RDX and a trace

formed by soil microbes. Only 10% of the applied

of its nitroso transformation product and 80% of

TNT was recovered from the soil as TNT and

the HMX remained. This result is similar to those

ADNTs, while only an additional 2% was recov-

reported for compost and digester sludges

ered from the tissues by both solvent extraction

(Thorne and Leggett 1999). This would be a

and base/acid hydrolysis. For the nitramines,

promising outcome for a limited remediation

27% of the applied RDX and 47% of the HMX was

scheme; however, when field capacity was

recovered from the soil, while 37% of the RDX

exceeded and leaching occurred, HMX, RDX, and