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Basic Blue Dye Adsorption from Water using Polyaniline/Magnetite(Fe3O4) Composites: Kinetic and Thermodynamic Aspects
Amir Muhammad1, Anwar-Ul-Haq Ali Shah2, Salma Bilal3,4
1Institute of Chemical Sciences, University of Peshawar, Peshawar 25120, Pakistan. amirics2015@gmail.com.
Materials (Basel, Switzerland)
|June 2, 2019
Summary
Polyaniline (PANI) magnetic composites effectively remove Basic Blue 3 dye from water. These PANI/Fe3O4 materials show enhanced adsorption capacity due to increased surface area and pore volume.
Area of Science:
- Materials Science
- Environmental Chemistry
- Nanotechnology
Background:
- Polyaniline (PANI) exhibits promising physicochemical properties for adsorbing pollutants.
- Dye and heavy metal contamination in aqueous solutions is a significant environmental concern.
- Magnetic composites offer potential for efficient water remediation.
Purpose of the Study:
- To synthesize and characterize polyaniline (PANI) composites with magnetic iron oxide (Fe3O4).
- To evaluate the efficiency of PANI/Fe3O4 composites for the removal of Basic Blue 3 (BB3) dye from aqueous solutions.
- To investigate the adsorption mechanism and kinetics of BB3 dye onto the synthesized materials.
Main Methods:
- Synthesis of Fe3O4, PANI, and PANI/Fe3O4 composites.
- Characterization using various analytical techniques.
- Adsorption experiments to study the effect of contact time, initial dye concentration, pH, and ionic strength.
- Fitting adsorption data to Langmuir, Frundlich, Dubbanin-Rudiskavich (D-R), and Tempkin isotherm models.
- Kinetic studies using pseudo-second-order model.
Main Results:
- PANI/Fe3O4 composites demonstrated significantly higher adsorption capacity (78.13 mg/g) compared to Fe3O4 (7.474 mg/g) and PANI (47.977 mg/g).
- Adsorption data best fitted the Langmuir isotherm model, indicating monolayer adsorption.
- Adsorption kinetics followed the pseudo-second-order model, suggesting chemisorption.
- Thermodynamic parameters indicated a spontaneous and exothermic adsorption process.
Conclusions:
- PANI/Fe3O4 composites are highly efficient adsorbents for Basic Blue 3 dye removal.
- The enhanced adsorption is attributed to the synergistic effects and increased surface area of the composite material.
- The study highlights the potential of magnetic PANI composites for wastewater treatment applications.
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