Functionalized moso bamboo powder adsorbent for Cd(II) complexes with citric acid/tartrate acid: characterization, adsorptive performance, and mechanism

A new amine group functionalized moso bamboo powder adsorbent (AMBP) was prepared using a facile procedure to remove Cd(II) complexes with citric acid (CA) and tartrate (TA). The properties of the AMBP were characterized SEM, FTIR, XPS, BET, an elemental analysis. adsorptive performances toward Cd(II)-CA/TA investigated. results indicated that successfully introduced, BET specific surface area 0.463 m2/g effective in adsorbing under pH 4.0–10.0. removal increased significantly when Cd(II)/ligand molar ratio changed from 1:0.5 1:2. adsorption processes endothermic fit well pseudo-second-order kinetic model (R2 > 0.999). Langmuir (qmax 14.41 7.58 mg/g for Cd(II)-CA Cd(II)-TA, respectively) isotherms better than Freundlich model. could be regenerated by HCl reused at least 4 times. uptake mechanisms proposed physisorption chemisorption coordination between –NH2/–NH Cd(II). This work shows is high practical value water or wastewater containing CA/TA.