2.4. Batch equilibrium studies
The batch adsorption experiments were conducted in a set of
250 mL Erlenmeyer flasks containing a prefixed amount of BFAC
and 200 mL of leachate solution. The mixture was agitated at
30 C for a predetermined period using a thermostatic orbital shaker
operated at an agitation speed of 120 rpm. The samples were
collected at prescribed time intervals, and the analytical determination
of boron and total iron was performed spectrophotometrically
using the Carmine and FerroVer methods, with a
spectrophotometer (HACH DR2500) at the maximum wavelengths
of 605 and 510 nm, respectively.