Abstract

Synthesized a reusable, cost-effective poly(urethane-urea)/CoFe₂O₄ (PUU/MNp) magnetic nanocomposite for the efficient removal of crystal violet dye from aqueous media. CoFe₂O₄ magnetic nanoparticles were prepared via the co-precipitation method and subsequently embedded into a poly(urethane-urea) matrix through mini-emulsion polymerization to minimize nanoparticle agglomeration. Performed structural characterization using attenuated total reflectance Fourier-transform infrared spectroscopy (ATR-FTIR) and X-ray diffraction (XRD). Evaluated dye removal performance using UV-Vis spectroscopy and varied parameters such as dye concentration, nanocomposite dosage, contact time, and pH. The synthesis process was environmentally benign and non-toxic, yielding a material with high recyclability. The nanocomposite showed rapid adsorption capabilities, achieving approximately 98–100% degradation of 100 ppm crystal violet within 90 minutes. These results highlight the potential applicability of the PUU/MNp nanocomposite in wastewater treatment systems targeting synthetic dye pollutants.