Preparation of Fe3O4/chitosan/poly(acrylic acid) composite particles and its application in adsorbing copper ion (II)
Fe 3 O 4 /chitosan/poly(acrylic acid) (Fe 3 O 4 /CS/PAA) composite particles, which are reusable, biodegradable and of high adsorption capacity, have been prepared through polymerizing acrylic acid in chitosan and Fe 3 O 4 nanoparticles aqueous solution. By varying in-feed mole ratio of carboxyl to...
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Veröffentlicht in: | Cellulose (London) 2012-12, Vol.19 (6), p.2081-2091 |
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Hauptverfasser: | , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Fe
3
O
4
/chitosan/poly(acrylic acid) (Fe
3
O
4
/CS/PAA) composite particles, which are reusable, biodegradable and of high adsorption capacity, have been prepared through polymerizing acrylic acid in chitosan and Fe
3
O
4
nanoparticles aqueous solution. By varying in-feed mole ratio of carboxyl to amino group (n
c
/n
a
) and reactant concentration, the average diameter of Fe
3
O
4
/CS/PAA composite particles can be controlled to vary from 100 to 300 nm. FT-IR, XRD and TEM were used to characterize Fe
3
O
4
/CS/PAA composite particles. Results showed that Fe
3
O
4
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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ISSN: | 0969-0239 1572-882X |
DOI: | 10.1007/s10570-012-9783-4 |