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Here, using Fe 3 O 4 @SiO 2 as a precursor, a novel core-shell structure magnetic Cu 2+ adsorbent (Fe 3 O 4 @zeolite NaA) was successfully prepared. Several methods, namely X-ray diffraction (XRD), Fourier transform infrared spectrometer (FTIR), Transmission electron microscope (TEM), Brunauer Emmett Teller (BET) and vibrating sample magnetometry (VSM) were used to characterize the adsorbent. A batch experiment was conducted to study the Cu 2+ adsorption capacity of Fe 3 O 4 @zeolite NaA at different pH values, contact time, initial Cu 2+ concentration and adsorbent does. It is found that the saturated adsorption capacity of Fe 3 O 4 @zeolite NaA on Cu 2+ is 86.54 mg/g. The adsorption isotherm analysis shows that the adsorption process of Fe 3 O 4 @zeolite NaA to Cu 2+ is more consistent with the Langmuir model, suggesting that it is a monolayer adsorption. Adsorption kinetics study found that the adsorption process of Fe 3 O 4 @zeolite NaA to Cu 2+ follows the pseudo-second kinetics model, which means that the combination of Fe 3 O 4 @zeolite NaA and Cu 2+ is the chemical chelating reaction. Thermodynamic analysis shows that the adsorption process of Fe 3 O 4 @zeolite NaA to Cu 2+ is endothermic, with increasing entropy and spontaneous in nature. The above results show that Fe 3 O 4 @zeolite NaA is a promising Cu 2+ adsorbent.

Core-shell Fe3O4@zeolite NaA as an Adsorbent for Cu2+