Add time:07/17/2019         Source:sciencedirect.com

In this paper, a heterometallic polyoxometalate Cs4H2PMo11FeO40·6H2O with Keggin structure was prepared and characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) and scanning electron microscopy (SEM) images. The as-prepared polyoxometalate has been utilized as the adsorbent for the removal of methylene blue dye from aqueous solution. The effective factors on the adsorption of this pollutant dye such as amount of adsorbent and adsorption time were examined. The adsorption efficiency and amount of adsorption (qe) were up to 97.4% and 140.84 mgg−1, respectively at the optimum conditions (0.4 gL−1 of adsorbent, 20 mgL−1 concentration of methylene blue and 2 min adsorption time). Furthermore, selective adsorption of methylene blue in the presence of methyl orange and rhodamine-B was demonstrated.

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