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Application of Novel Magnetic Β-Cyclodextrin-Anhydride Polymer Nano-Adsorbent in Cationic Dye Removal From Aqueous Solution Publisher



Vahedi S1 ; Tavakoli O1 ; Khoobi M2, 3 ; Ansari A1 ; Ali Faramarzi M4
Authors
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Authors Affiliations
  1. 1. School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, 14176, Iran
  2. 2. Department of Pharmaceutical Biomaterials and Medical Biomaterials Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
  3. 3. Department of Medicinal Chemistry, Faculty of Pharmacy and Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran, 14176, Iran
  4. 4. Department of Pharmaceutical Biotechnology, Faculty of Pharmacy and Biotechnology Research Center, Tehran University of Medical Sciences, P.O. Box 14155–6451, Tehran, 14174, Iran

Source: Journal of the Taiwan Institute of Chemical Engineers Published:2017


Abstract

Novel series of β-cyclodextrin (βCD) and βCD-anhydride polymer coated magnetic nanoparticles (Fe@CDA2) were prepared and evaluated for Rhodamine B (RhB) and Methylene Blue (MB) adsorption. The adsorbents were characterized by FTIR, XRD, SEM, TGA, and VSM analysis. Batch adsorption experiments showed that the adsorption was quite fast, and the percentage of RhB and MB, removed in the first 10 min of the process, was 71 and 87% of the final equilibrium values, respectively, and adsorption followed a pseudo-second-order kinetic model. The adsorption was dependent on pH, dye initial concentration, and adsorbent dosage. Higher adsorption capacity was obtained at pH ∼12 for both dyes. The adsorbent dose of 2 and 1.5 g/L were chosen as the optimum values for RhB and MB, respectively. The equilibrium data were well represented by the Langmuir model and the maximum capacities (qm) of MB and RhB by Fe@CDA2 were found to be 333.3 and 250.0 mg/g, respectively. The adsorbed dye could be desorbed using methanol solution containing 5 vol% acetic acid which desorbed 99.5 and 98.0% of the adsorbed RhB and MB dye, respectively. The regenerated adsorbent was used again in adsorption process, and after five cycles of reuse, only 10% decrease was observed in adsorption capacity of Fe@CDA2. © 2017 Taiwan Institute of Chemical Engineers
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