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


ABSTRACT: Here, using Fe3O4@SiO2 as a precursor, a novel core-shell structure magnetic Cu2+ adsorbent (Fe3O4@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 Cu2+ adsorption capacity of Fe3O4@zeolite NaA at different pH values, contact time, initial Cu2+ concentration and adsorbent does. It is found that the saturated adsorption capacity of Fe3O4@zeolite NaA on Cu2+ is 86.54 mg/g. The adsorption isotherm analysis shows that the adsorption process of Fe3O4@zeolite NaA to Cu2+ is more consistent with the Langmuir model, suggesting that it is a monolayer adsorption. Adsorption kinetics study found that the adsorption process of Fe3O4@zeolite NaA to Cu2+ follows the pseudo-second kinetics model, which means that the combination of Fe3O4@zeolite NaA and Cu2+ is the chemical chelating reaction. Thermodynamic analysis shows that the adsorption process of Fe3O4@zeolite NaA to Cu2+ is endothermic, with increasing entropy and spontaneous in nature. The above results show that Fe3O4@zeolite NaA is a promising Cu2+ adsorbent.

SUBMITTER: Cao J 

PROVIDER: S-EPMC7665120 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature

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Core-shell Fe<sub>3</sub>O<sub>4</sub>@zeolite NaA as an Adsorbent for Cu<sup>2</sup>.

Cao Jun J   Wang Peng P   Shen Jie J   Sun Qi Q  

Materials (Basel, Switzerland) 20201110 21


Here, using Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub> as a precursor, a novel core-shell structure magnetic Cu<sup>2+</sup> adsorbent (Fe<sub>3</sub>O<sub>4</sub>@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  ...[more]

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