In each experiment, the initial characteristics were determined
as to reduce the background interferences. All samples were filtered
(Whatman Grade 1 qualitative filter paper) prior to analysis
to minimize the interference of carbon fines with the analysis. Each
adsorption experiments were replicated three times at least and
their arithmetical averages were used as the result. The adsorptive
uptakes of boron and total iron at time t, qt (mg/g) and equilibrium,
qe (mg/g), were calculated by