87
In the Elbe, Main, and Weser River, the concentrations of dissolved Zn in the
porewater was lower compared to the overlying water. In the Rhine River sediments,
porewater Zn increased with depth.
-20
0
20
40
6O
80
0
. ,~-20,
201
~
601
Elbe River
801
2
4
6
0
~>,
40
),
Main River
Rhine River
2
4
6
0
2
4
~" 0
~D
E
. _
"~ 20
--= 40
~
6O
e~
y~ 8o
0
Elbe River
200
400
,';:'~ : ',:; ,~':
8O[
0
............
.r
Main River
2 ~
4 ~
0
2 ~
4 ~
-20
0
20
4O
6O
8O
0
(Weser River
6040[ ............
Weser River
801
4
8
12 16
0
200
400
Fig. 4.48. Dissolved Pb ( ---m- ,nM) and particulate Pb ( ~
, mgJkg) in the sediments