The
pH of the solution was adjusted to the required pH value
range (2–7) by adding 0.1 M HCl or 0.1 M NaOH solution.
Adsorption data obtained from the effect of contact time,
pH, initial concentration of lead(II) ion, and dose of
adsorbent, were employed in testing the applicability of
different kinetic equations and isotherms. Blank samples
were also run under similar conditions. Each experiment
was repeated and the results taken as averages.