Synergistic deep removal of As(III) and Cd(II) by a calcined multifunctional MgZnFe-CO layered double hydroxide: Photooxidation, precipitation and adsorption.

A high removal rate (>99.7%) of combined arsenite (As(III)) and Cd (Cd(II)) in low concentration (1000 μg/L) from contaminated water was achieved by a calcined MgZnFe-CO layered double hydroxide (CMZF) adsorbent. Batch control studies and a series of spectroscopy detection technologies were employed to investigate the removal mechanism and interactions between As(III) and Cd(II) on the interface of water/CMZF.