NPs have been created and studied by Singh, Sunanda, et al. by utilizing three distinct capping agents, including starch, PVP, and PEG (polyethylene glycol). The arsenic removal process involved two key components: SnFe2O4 NPs, synthesized through chemical precipitation, and a carbon foam, made by carbonizing polyurethane foam and then treating it with a phenolformaldehyde solution. The NPs were incorporated into the carbon foam before it was used to treat As contaminated water. This study presents the synthesis of magnetic mesoporous spinel NiFe2O4, which possesses a high surface area of up to 301.6 m²/g and a well-defined distribution of pore sizes ranging from 2.5 to 16.2 nm. The synthesis was achieved by the simple oxalate decomposition process using a one-phase, multi-component precursor. This method effectively generates the material without the use of any templates to create pores. This mesoporous material has shown great potential in adsorbing acid orange 7 (AO7) and might be utilized as a magnetically distinguishable adsorbent for wastewater treatment that contains AO7. In their study, Gao et al. successfully manufactured mesoporous NiFe2O4, which exhibits excellent adsorption properties and can be conveniently recycled without any loss in its effectiveness. In addition, the adsorbed AO7 on the adsorbent can be quickly eliminated through heat breakdown. Sujata, et al. created ZnFe2O4 MNPs and used them against gram-positive and gramnegative bacterial strains, it had a respectable antibacterial efficacy. The findings show that these magnetic ferrites, in their pristine and calcined forms, made by a soft chemical route and synthesized in ambient conditions, can be used successfully as a magnetically recyclable material to remove biological and chemical contaminants from water and waste. In a study by Vinosha et al., CoFe2O4 NPs were synthesized using a co-precipitation method, with the pH during the process adjusted between 9 and 12. The resulting nanocatalyst was then employed to degrade MB dye, a common organic pollutant in textile wastewater. Notably, the research suggests that the catalyst exhibits good reusability, making it a promising option for industrial wastewater treatment applications. The hydrothermal (ZFO-H) and citrate sol-gel (ZFO-C) methods were used by Zhang et al. to produce the ZnFe2O4 catalysts.