Using Double Layer Hydroxides Grafted With EDTA for Removal of Some Heavy Metals from Groundwater
Keywords:double layer hydroxides, EDTA, Water treatment, Heavy metals, Removal
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.
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