zeolites [13], metal organic frameworks [14; 15], MXenes [16], copper oxide [17], titanium (IV) oxide [18], and titanium suboxides [19; 20]. One of the key advantages of magnetic nanoparticles compared to other types of materials used for wastewater treatment is their magnetic separability, which allows for the rapid and efficient removal of particles from water after pollutant adsorption. Among all magnetic particles, the most promising and widely spread materials are ferrites, a class of magnetic nanoparticles composed primarily of iron oxides and other metal ions [21; 22; 23]. One of the main advantages of ferrites is their chemical stability, particularly in harsh environments, which is essential for wastewater treatment applications where conditions can be highly variable regarding pH, temperature, and chemical composition [9; 24]. This stability ensures that ferrites maintain their structural integrity over time, reducing the likelihood of particle degradation or leaching of toxic ions, which could otherwise introduce secondary contamination. Ferrites, such as magnetite (Fe\({}_{3}\)O\({}_{4}\)) and cobalt ferrite (CoFe\({}_{2}\)O\({}_{4}\)), exhibit strong magnetic properties, which allow for efficient separation from treated water using external magnetic fields [22; 25; 26]. Compared to other types of magnetic nanoparticles, ferrites often exhibit higher saturation magnetization, particularly when doped with metals like cobalt or nickel, enhancing their separation efficiency [27; 28]. This magnetic strength enables more rapid recovery, reducing the time and energy required for the process and increasing the overall feasibility of their use in continuous flow systems. In addition to the strong magnetic properties, ferrites are highly versatile in functionalization with a wide range of surface coatings and functional groups to target specific pollutants in wastewater, specifically heavy metals, organic pollutants, and pathogens [29; 30; 31; 32; 33]. Ferrite modification with organic ligands, polymers, or inorganic materials can significantly enhance their adsorption capacity and selectivity for contaminants [34; 35; 36]. Silane-coated ferrites, for instance, have been shown to improve the adsorption of heavy metal ions from industrial wastewater, such as lead and cadmium [37; 38]. Moreover, the inherent iron oxide composition of ferrites facilitates their role in advanced oxidation processes, such as the Fenton reaction, where ferrites act as catalysts to generate reactive oxygen species, decomposing organic pollutants such as dyes and pharmaceuticals into less harmful byproducts [39; 40]. This catalytic ability gives a distinct advantage over other nanoparticles, as ferrites both adsorb and decompose pollutants, offering a more comprehensive approach to water purification. Ferrites also exhibit excellent reusability, which is critical for the sustainability of water treatment processes [41]. After pollutant removal, ferrites can be regenerated and reused multiple times without significant activity loss, reducing operational costs. The regeneration process typically involves simple washing or chemical treatment to desorb the contaminants, after which the ferrites can be reintroduced into the system for additional cycles of water purification [42; 43; 44]. Another advantage of ferrites is their low toxicity and environmental impact [45]. Iron oxides, the most widely studied ferrites, are naturally abundant and relatively non-toxic, making ferrites safer for large-scale environmental applications and minimizing the risk of introducing harmful materials into the environment [46; 47; 48]. Furthermore, ferrites are more cost-effective due to their low cost and abundance of iron-based materials [49; 50]. Synthesis methods for ferrites, such as coprecipitation [51], sol-gel processes [52], and hydrothermal [53; 54] techniques, are relatively simple and scalable, making them economically viable for widespread use in wastewater treatment facilities.