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Methylene blue removal using a nanomagnetic support: a response surface approach.
Thais Ribeiro do Nascimento Moraes Calazans1, Ana Carolina de Lima Barizão2, Thais de Andrade Silva1
1Federal University of Espírito Santo Vitoria Espírito Santo 29075-910 Brazil jairo.oliveira@ufes.br.
Nanoscale Advances
|July 25, 2024
Summary
This study shows that Fe3O4 nanoparticles coated with sodium dodecyl sulfate effectively remove methylene blue dye from wastewater. This nanomaterial offers a promising, spontaneous, and favorable adsorption process for environmental remediation.
Area of Science:
- Environmental Science
- Materials Science
- Chemical Engineering
Background:
- Textile wastewater poses environmental risks due to untreated discharge.
- Nanomagnetic materials offer a promising solution for wastewater treatment.
- Challenges include nanoparticle stability and experimental reproducibility.
Purpose of the Study:
- To evaluate the efficiency of Fe3O4 nanoparticles coated with sodium dodecyl sulfate (MNP-SDS) for methylene blue (MB) removal.
- To optimize the adsorption process using factorial design.
- To characterize the nanomaterial and understand the adsorption mechanism.
Main Methods:
- Characterization of MNP-SDS using TEM, XRD, Raman, and FTIR spectroscopy.
- Optimization of the adsorption process through two-stage factorial design (fractional and complete).
- Analysis of adsorption isotherms and thermodynamic parameters.
Main Results:
- MNP-SDS was successfully synthesized and characterized.
- The highest MB removal percentage was achieved using 15 g L-1 of MNP-SDS, with an experimental adsorption capacity (qexp) of 1.5 mg g-1.
- Isothermal analysis indicated spontaneous and favorable adsorption, best fitted by the Langmuir model.
Conclusions:
- MNP-SDS is an effective adsorbent for methylene blue removal from wastewater.
- The adsorption process is spontaneous, favorable, and follows Langmuir kinetics.
- This study demonstrates the potential of MNP-SDS for environmental remediation applications.
