Table 6.

Concentration, product mass and maximum sorption time values used for the kinetic analysis.

Heavy metals ions	Concentration (g/L)	Absorbent mass (g)	Time (min)
$P{b}^{2+}$	0.30	0.1	12
$C{d}^{2+}$	0.10	0.5	13
$C{o}^{2+}$	0.10	0.1	30
$C{u}^{2+}$	1.0	0.1	60
$H{g}^{2+}$	0.30	0.1	11
$N{i}^{2+}$	1.46	0.5	30
$Z{n}^{2+}$	0.02	0.1	30
$C{r}^{3+}$	0.30	0.1	27
$C{r}_2{O}_7^{2-}$	1.54	0.86	24