496
K.S. Patel et al.
ppm
500 .----------------------------------------------,
400
300
_
River
_
Pond
3
Fig. 2. Average concentration of Fe, Mn, Zn in sediments. I = I B, 2 = TPP + CMB, 3 = 1MB,
[Fel = C x 10
of other elements, i.e. Co, Ni, Cu and Pb, showed a reverse trend (Fig. 5). The
concentration of Zn increased in the river basin as the depth profile of sediment
increased, but a reverse trend occurred in pond sediment. Among them, Cd had
no correlation with the depth profile. The concentration of pb decreased
significantly as the depth profile of sediment increased, and mostly concentrated
at the surface of the sediment.
ppm
60~----------------------------------------------,
40
20
2
3
2
3
2
3
_
River
_
Pond
2 3
Fig. 3. Average concentration of Cr, Co, Ni, Cu in sediments. I = IB, 2 = TPP + CMB, 3 = 1MB