Removal of Cadmium from Polluted Water Using Layered Double Hydroxides as Effective Adsorbents
Keywords:
Layered double hydroxides, Ion exchange, Chelating agents, Sorbents, Cadmium contaminationAbstract
Layered double hydroxides (LDHs) are layered materials containing a positively charged layer and exchangeable anions in the interlayer. In this study, LDHs intercalated with chelating agents were synthesized by anion exchange reaction. The materials synthesized in this work were characterized by chemical analysis, Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and powder X-ray diffraction (XRD). Adsorption experiments from aqueous solutions containing known amounts of some heavy metallic ions onto the adsorbent were explored in a batch system. The amount of metallic ions adsorbed by LDHs intercalated with EDTA and LDHs without EDTA were determined by and atomic absorption spectrometry (AAS). In order to examine the adsorption capacity of LDHs intercalated with chelating agents, the adsorption experiment was investigated under the optimum condition.
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