Layered Double Hydroxides Mg/Fe Intercalated H_3a-PW_(12)O_(40)?nH_2O as Adsorbent of Cadmium(II)

摘要

Intercalation of Mg/Fe layered double hydroxides with H_(3[α)-PW_(12)O_(40)]?nH_2O was successfully conducted. Characterization was carried out using FTIR and XRD analyses. Material was used as adsorbent of cadmium (II) in aqueous medium. Adsorption was studied through pH system, adsorption time, concentration of cadmium(II), and temperature. XRD analysis showed that Interlayer distance of Mg/Fe layered double hydroxides was increased after intercalation with H_3[α-PW_(12)O_(40)]?nH_2O from 4.39 A to 4.75 A. Unique vibration of Mg/Fe before and after intercalation was found at wavenumber 1381 and 1635 cm~(-1). Analysis of PZC showed that pH PZC of Mg/Fe layered double hydroxides and intercalated material was 9 and 8. Adsorption of cadmium(II) using Mg/Fe layered double hydroxides and intercalated material showed that intercalated material has better adsorption properties than Mg/Fe layered double hydroxides.