Novel EDTA-chitosan/alginate porous composite beads for the removal of Pb(<scp>ii</scp>) and methylene blue from aqueous solutions
Xueling Liu, Wenjie Ren, Wenyue Song, Wanqiang Zhang, Yuhan Wang, Yi Wang, Guozhi Fan, Lei Zhang, Yanjun Huang
Abstract
, respectively, at 298 K. Adsorption kinetics and isotherm studies indicated that the adsorption well fitted the pseudo-second-order kinetic model and the Langmuir isotherm. A possible adsorption mechanism involving electrostatic attraction, chelation, ion exchange, H-bonding and synergistic effects was proposed. Moreover, EC-AB showed superior stability and reusability, with removal efficiencies of 76.64% for Pb(ii) and 80.29% for MB after five continuous adsorption-desorption cycles for treating complex wastewater. In summary, this work provides a beneficial strategy for designing high-performance adsorbents for the treatment of wastewater.