67
-10
0
20
40
i2o
<6nM
4
60
601 ~
8(
8C
0 20 40 60 80 100 0
E -lo
O,
eE 2O
e. 40
~
~ 60
~ 80
a...
a. Elsenz
-10
0 j
-1C
20
\\
40
i
60 .
8f
o}
2O
40
60
80
0,2
0,4
0.6 0
200 400 600 800
b. Enz
O~ ",
20]
9 9 9 ~
/
40
~176
I
;
6ol
"- I I
8ol
:"
0 20 40 60 80 100 0
0.2
0.4
b. Schwarzbach
1r
201 " " " " ' . ,
ttl m
4il . , ---0,6 0
2 ~ 400 600 8 ~
0 20 40 60 80 100 0 0.2 0,4 0.6 0.8
Cr a+ (nM)
Fe 2+ (mM)
Cr (mg/kg)
Fig. 4.31. Porcwatcr Cr and Fe, and Cr in the sediments (< 20 lain) of the tributaries