A one-pot method to remove methyl orange (MO, organic contaminant) and CrO4 2− (Cr, inorganic contaminant) from waste water was developed by forming Zn-Al layered double hydroxides (ZnAl-LDH). By this process, the efficiency of MO or Cr removal was nearly 100% and reached the theoretical maximum of ZnAl-LDH removal capacity. In addition, the mixed contaminants of MO and Cr in wastewater can be separated from each other by controlling the addition of Zn/Al solution using this one-pot method. The molecular arrangement of the immobilized contaminants in the interlayer of LDH and the selective removal mechanism were analyzed by calculated binding energies obtained from molecular simulation.
All Science Journal Classification (ASJC) codes
- Geochemistry and Petrology