Using Double Layer Hydroxides Grafted With EDTA for Removal of Some Heavy Metals from Groundwater

Authors

  • Ahmed M. Desouky Hydrogeochemistry Department, Desert Research Center, Cairo, Egypt.
  • Mohamed E.A. Ali Hydrogeochemistry Department, Desert Research Center, Cairo, Egypt.

Keywords:

double layer hydroxides, EDTA, Water treatment, Heavy metals, Removal

Abstract

EDTA· Mg-Al LDH that had an intercalated in the interlayer of Mg-Al LDH, could be synthesized by adding a solution of Mg(NO3)2 and Al(NO3) 3 to a solution of NaOH and EDTA -2Na (disodium- EDTA). The effect of the NaOH concentration in the solution on the formation of EDTA ·Mg-Al LDH was examined to control the chemical species of the EDTA incorporated in the interlayer. The synthesized EDTA· Mg-Al LDH was found to have a capacity for rapid uptake of Fe2+ and Pb2+ from an aqueous solutions. Batch experiments were conducted to study the effects of pH, shaking time. The results reveal that the maximum adsorption capacity is 85.71 and 109.21 mg g−1. which displaying a high efficiency for the removal of Fe2+ and Pb2+ from aqueous solution. The adsorption follows
Langmuir model and pseudo-second-o rder kinetics.

Published

30.06.2022