Fig. 14
From: Pincer ligand mesoporous material in heavy metal adsorption for environmental purposes

Elimination percentages of @SiA3 towards Cu2+ up to five cycles. Adsorption conditions: 10 mg of @SiA3 in 10 mL of aqueous solution at pH 6.0 and 25 °C for 2 h. After each cycle, the material was recovered after acidic treatment with HCl 1 M and reused.