Application of magnetic polyaniline nanocomposite for separation of uranyl ions from aqueous solutions

Polyaniline (PANI) was synthesized chemically, and then modified with magnetic iron oxide nanoparticles (Fe 3 O 4 NPs). PANI and PANI-Fe 3 O 4 NPs were used for removal of uranyl ions (UO 2 2+ ) from aqueous solutions using a batch system. The synthesized adsorbents were characterized using FT-IR, S...

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Bibliographic Details
Published in:Separation science and technology 2018-10, Vol.53 (15), p.2486-2499
Main Authors: Saghatchi, Hadis, Ansari, Reza
Format: Article
Language:English
Subjects:
Adsorption
Aqueous solutions
Chemical synthesis
Endothermic reactions
Entropy
Ions
Iron oxides
Kinetics
magnetic nanocomposite
Nanocomposites
Nanoparticles
Organic chemistry
polyaniline
Polyanilines
Removal
Solutions
Uranyl (VI)
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Summary:Polyaniline (PANI) was synthesized chemically, and then modified with magnetic iron oxide nanoparticles (Fe 3 O 4 NPs). PANI and PANI-Fe 3 O 4 NPs were used for removal of uranyl ions (UO 2 2+ ) from aqueous solutions using a batch system. The synthesized adsorbents were characterized using FT-IR, SEM, BET and XRD techniques. From isotherm investigation, the maximum adsorption capacities (q m ) were 150.0 and 108.0 mg g −1 for PANI and PANI-Fe 3 O 4 NPs, respectively. The kinetics and equilibrium adsorptions were well-described by the pseudo-second-order kinetic and Langmuir model, respectively. Thermodynamic studies depicted that the adsorption of uranyl ions by PANI is a spontaneous exothermic process and in the case of PANI-Fe 3 O 4 NPs, adsorption process is endothermic; therefore, the spontaneity is controlled by entropy.
ISSN:0149-6395
1520-5754
DOI:10.1080/01496395.2018.1459701