Abstract
A novel magnetic functionalized MCM-48 mesoporous silica with amine (NH2) and melamine-based dendrimer amines (MDA) were synthesized that can be easily separated from aqueous solutions by applying a magnetic field. The synthesis adsorbent (MDA-magMCM-48) was characterized by low angle XRD, TEM, FT-IR, TGA and N2 adsorption–desorption isotherm techniques. Batch adsorption experiments were carried out to study the sorption behavior of MDA-magMCM-48 toward Pb(II), Cu(II), Cr(VI) and Cd(II) metal ions. The adsorption of metal ions was well modeled by pseudo-second-order model and Langmuir sorption isotherm with maximum adsorption capacities of 127.24, 125.80, 115.60 and 114.08mgg−1 Pb(II), Cu(II), Cr(VI) and Cd(II) metal ions, respectively. MDA-magMCM-48 was regenerated and found to be suitable for reuse in successive adsorption–desorption cycles for three times without significant loss in adsorption capacity.
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