The influence of initial pH on Cd adsorption was
studied. The Cd solution pH was adjusted from 3 to 7 by
1 mol/L HNO3 and 1 mol/L NaOH. The initial Cd
concentration is 100 mg/L. Adsorption was performed in
a rotary shaker with 100 r/min at 30 °C. Shaking for 30
min, the Cd concentrations were determined.