After biosorption, biosorbent was separated from the
solution by passing through a 0.45 μm GF/C filter and the
filtrate was subjected to residual cadmium concentration
determination. The residual concentrations of the cadmium
ions were analyzed by flame atomic absorption
spectrophotometry (Perkin Elmer AAnalyst 200).
The cadmium ions capacity per gram of pomelo peel
material was determined by employing the mass balance. The
equilibrium cadmium ions capacity was calculated as :