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A core–shell Fe3O4@MCM-41-NH2 was synthesized as a magnetic mesoporous nanocomposite was used as an adsorbent for the effective and rapid removal of anionic dye, Congo red. The Fe3O4@MCM-41-NH2 nanocomposites were characterized by FT-IR, SEM, TEM and XRD. The selected removal conditions obtained by a central composite design under response surface methodology were: pH 4.0, mass of adsorbent 0.01 g,...
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