498
K.S. Patel et al.
P
IPb
R,P IT!
R
P
Hg
III
-0 ....
III
E
>R,P ICd
>
1:1
R
III
.c.
-
Zn
0
c
0
-
P
1:1
...
....
R
c
QI
U
C
Cu
0
P
u
R,P I Ni
RP ICo
R
Fe
P
R,P
IMn
R
I Cr
P
0
2
3
Depth (in meters)
Fig. 5. Downward dispresion trend of heavy metals in sediment