Abstract
Fe3O4/chitosan/poly(acrylic acid) (Fe3O4/CS/PAA) composite particles, which are reusable, biodegradable and of high adsorption capacity, have been prepared through polymerizing acrylic acid in chitosan and Fe3O4 nanoparticles aqueous solution. By varying in-feed mole ratio of carboxyl to amino group (nc/na) and reactant concentration, the average diameter of Fe3O4/CS/PAA composite particles can be controlled to vary from 100 to 300 nm. FT-IR, XRD and TEM were used to characterize Fe3O4/CS/PAA composite particles. Results showed that Fe3O4 was indeed incorporated into CS/PAA particles. The composite particles showed high efficient to remove copper ions (II) in aqueous solution. Adsorption kinetic studies showed that the adsorption process followed a pseudo-second-order kinetic model and the equilibrium data agreed well with the Langmuir model. The saturated adsorption capacity obtained from the experimental was 193 mg/g in close to proximity to the data 200 mg/g calculated from Langmuir model. The saturated adsorption capacity still retained 100 mg/g after three cycles of adsorption–desorption of copper ions (II).
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The authors thank for jointly supporting by the 211 Project of Anhui University, Anhui Provincial Natural Science Foundation (1208085QB38) and the foundation for outstanding young talent in University of Anhui Province (2012SQRL024).
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Zhang, S., Zhou, Y., Nie, W. et al. Preparation of Fe3O4/chitosan/poly(acrylic acid) composite particles and its application in adsorbing copper ion (II). Cellulose 19, 2081–2091 (2012). https://doi.org/10.1007/s10570-012-9783-4
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DOI: https://doi.org/10.1007/s10570-012-9783-4