ABSTRACT In this study, polyazomethine and iron oxide (Fe 3 O 4 ) composite nanoparticles were synthesized to remove methylene blue from water, thereby helping prevent environmental harm. The structural, physical, crystalline, morphological, and thermal properties of the materials (PAM, Fe 3 O 4 , and PAM‐Fe) were analyzed using Fourier transform infrared (FT‐IR) spectroscopy, x‐ray diffraction (XRD), scanning electron microscopy (SEM), and thermogravimetry (TG). Adsorption experiments assessed the ability of the adsorbents, which included triazine–polyazomethine and iron oxide particles, to capture methylene blue molecules by examining parameters such as temperature (30°C–50°C), initial pH (3–11), adsorbent dose (0–100 mg), and contact time (0–100 min). XRD analysis showed that the particle sizes of Fe 3 O 4 and PAM‐Fe were calculated to be 7.59 ± 2.13 and 9.25 ± 2.45 nm, respectively. Additionally, the point‐zero charge of PAM‐Fe and the effect of coexisting ions on dye removal efficiency were evaluated. The maximum methylene blue adsorption capacity reached 232.56 mg g −1 at 50°C and pH 7.0 within 120 min. Moreover, the dye adsorption process onto the fabricated nanoparticles was demonstrated to be spontaneous, thermodynamically favorable, and characterized by an increase in disorder.
Musa Kamacı (Tue,) studied this question.