Centrifugally spun magnetic nanofibers for anionic dye removal: Optimization and predictive modeling with RSM and ANN

• Published in: Journal of dispersion science and technology 2024-11, Vol.45 (14), p.2508-2523
• Main Authors: Hennaoui, Siham, El-Miloudi, Khaled, Varol, Esin Apaydin
• Format: Article
• Language: English
• Subjects: Adsorbents; Adsorption; anionic dye; Artificial neural networks; Chemical synthesis; composite nanofibers; Dyes; Iron oxides; Modelling; Nanocomposites; Nanofibers; Nanoparticles; Optimization; PET/Fe; Polyethylene terephthalate; Prediction models; Predictions; Response surface methodology; Stabilizers (agents); Water treatment
• ISSN: 0193-2691; 1532-2351
• DOI: 10.1080/01932691.2023.2271061

Response surface methodology (RSM) and artificial neural network (ANN) approach were used for the modeling-optimization of dye removal by adsorption using poly(ethylene terephthalate)/Fe 3 O 4 nanocomposites nanofibers. The nanoparticles of Fe 3 O 4 were synthesized by the chemical co-precipitation method in the presence of linoleic acid as a stabilizer. The polymer matrix was obtained by recycling PET from plastic water bottles. We used a simple homemade centrifugal spinning device to prepare PET/Fe 3 O 4 nanofibers and the resulting material was characterized by XRD, FTIR and SEM. The performance of the nanofiber material as an adsorbent was examined in water treatment to remove Naphthol Green B anionic dye in batch mode. Box-Behnken-RSM and ANN were employed to optimize the effect of pH, contact time, initial dye concentration, and adsorbent mass. The optimized conditions leading to the maximum predicted dye removal were a pH of 2, a contact time of 60 min, an adsorbent mass of 0.125 g/L, and a dye concentration of 20 mg/L, and. The results demonstrated that both methods showed good predictions of dye removal. The pseudo-first-order kinetic and Langmuir isotherm models were found to be best fitted with the experimental data and rePET/Fe3O4 exhibited a maximum NGB dye adsorption capacity up to 155 mg/g. This study also indicates that magnetite nanoparticles combined with recycled PET in the form of nanocomposite nanofibers could be used for the treatment of dye wastewater.