A new composite adsorbent was prepared by modifying low cost local adsorbent (LCL) using MgFe layered double
hydroxide (LDH). This low cost local adsorbent was also prepared from the activation of date palm leaf derived from agricultural
waste. In comparison to the low LCL, the adsorption capacity of the new composite adsorbent (LCL/MgFe-LDH)
was improved. This was measured in terms of its ability to remove lead from wastewater. The Scanning electron microscope
(SEM), Energy dispersive spectroscopy (EDS), Fourier-transform infrared spectroscopy (FTIR) and the specific surface
area by the (Brunauer, Emmett and Teller) theory (BET) tests were conducted for the characterisation of LCL and
LCL/MgFe-LDH. The behaviour of the lead adsorption processes by using LCL/MgFe-LDH as adsorbent was investigated
in batch experiments by examining different values of solution pH, contact time, adsorbent dose and initial Pb2+ concentration.
High removal efficiency was exhibited by LCL/MgFe-LDH, a value almost double that of LCL. This was attributed to
the increase in surface area of LCL/MgFe-LDH (79.7 m2·g–1) in contrast to the surface area of LCL (24.5 m2·g–1). The
Freundlich equations and pseudo-second-order kinetics model were appropriate for the provision of adsorption equilibrium
data for Pb2+ on adsorbents. These results reveal the great potential of the new composite adsorbent (LCL/MgFe-LDH) if
applied to the absorption of heavy metal ions.
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