194
T. Schondorf et al.
Extinction A
0.9
0.5
0.8
l\
f \
0.4
! r60
Hg in soil gas
Depth
[/-lg!mJj
100
20cm
85
- 0.3
0.7
0.6
0.5
40cm
193
60cI11
233
80cm
505
- 0.2
0.4
0.3 -
100cm
217
40
120cl11
>1400
O.t
0.2
0.1 -
20
0.0
0
0
100
200
300
400
500
600
700
°C
Extinction A
0.3 r - - - - - - -- - - - - - - -- - - - - - - - - - - ,
0.2
0.1 -
100
200
matrix-bound Hg
(HgO or Hg 2+ ? )
300
400
500
°C
Fig. 6. Determination of Hg-binding forms by solid-phase-pyrolysis
600
700
In the storage area the highly contaminated fill material [5390 pg Hg(total)/l in
the eluate I contained only 13% mercury in an organic complex form. Remarkable
is the high fraction of Hgo. In the underlying loess, the ratio changes in the case
of low eluate contents in favour of the water-soluble organic complexed Hg
fraction. In the relatively minor contaminated sand/gravel sediments only the
T. Schondorf et al.
Extinction A
0.9
0.5
0.8
l\
f \
0.4
! r60
Hg in soil gas
Depth
[/-lg!mJj
100
20cm
85
- 0.3
0.7
0.6
0.5
40cm
193
60cI11
233
80cm
505
- 0.2
0.4
0.3 -
100cm
217
40
120cl11
>1400
O.t
0.2
0.1 -
20
0.0
0
0
100
200
300
400
500
600
700
°C
Extinction A
0.3 r - - - - - - -- - - - - - - -- - - - - - - - - - - ,
0.2
0.1 -
100
200
matrix-bound Hg
(HgO or Hg 2+ ? )
300
400
500
°C
Fig. 6. Determination of Hg-binding forms by solid-phase-pyrolysis
600
700
In the storage area the highly contaminated fill material [5390 pg Hg(total)/l in
the eluate I contained only 13% mercury in an organic complex form. Remarkable
is the high fraction of Hgo. In the underlying loess, the ratio changes in the case
of low eluate contents in favour of the water-soluble organic complexed Hg
fraction. In the relatively minor contaminated sand/gravel sediments only the