Desorption of metals
Desorption studies were performed in a way that, 0.1 g of
biosorbent was shaken with 10 mL of 10 mg/L cadmium ion
solution for 5–30 min. After shaking and filtration steps, biosorbed
metals were tried to be desorbed in separate experiments
with 1M HCl, 1 M H2SO4, 1 M HNO3 and distilled
water. Finally, the concentration of the metal ions in the filtrate
was determined by AAS. The eluted metal was determined
and the elution efficiency by desorption agent can be
defined as follows: