Synthesis and Characterization of Magnetic Fe₃O₄/Zeolite NaA Nanocomposite for the Adsorption Removal of Methylene Blue Potential in Wastewater Treatment

Figure 7

UV-VIS absorbance spectra of supernatants collected from batch adsorption experiments. (a) The absorbance spectra of the MB solution treated by Fe₃O₄/ZA nanocomposite with different Fe₃O₄ NP loadings; (b, c) absorbance spectra of 3.3% Fe₃O₄/ZA and 6.6% Fe₃O₄/ZA samples at different interaction (adsorption) times; (d) removal efficiency (R, %) and adsorption capacity (, mg·g⁻¹) of 3.3% Fe₃O₄/ZA and 6.6% Fe₃O₄/ZA samples, respectively; linear fitting results of removal efficiency and adsorption capacity in adsorption ranges of 0–60 minutes (e) and 60–240 minutes (f) in (d); the experiments data are presented as solid dots with error bars, while solid lines are linear fitting results of experiments data in Figures 7d, 7e, and 7f.

(a)

(b)

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(d)

(e)

(f)