A new NC adsorbent, ALW/CoFe2O4, was made by combining Apocynaceae leaf waste-AC (ALW) with CoFe2O4 using an auto-combustion technique. This adsorbent was developed to eliminate Reactive Red 141 dye and bacteria, namely S. aureus, E. coli, and C. albicans. The hydrothermal method at 180°C for 15, 20, and 25 hours was effectively used by Sarang R et al. to prepare the spinel ferrite NPs (SFNPs) of Mg0.2Zn0.5Mn0.3Fe2O4. Through the use of Zone of Influence (ZOI), the antibacterial effectiveness of SFNPs against several harmful bacteria was demonstrated. Kumari et al. described the production of Ca-doped Mg-Zn ferrite Mg0.4Zn(0.6-x)CaxFe2O4 nanomaterials using a citrate precursor method, and they conducted a thorough analysis of their structural, morphological, optical, photocatalytic, and antibacterial properties. The RhB dye solution was degraded by photocatalysis under UV light. On the fungus Candida albicans, every one of the produced nano ferrites showed a promising antibacterial activity. RhB dye may be degraded by Mg0.4Zn0.1Ca0.5Fe2O4 NPs more effectively (99.5%) and they exhibit greater antibacterial activity (96.1%) when it comes to inhibiting the Candida albicans fungus. Silvermagnetite NPs were combined by El-Bassuony et al. with several magnetic materials, including spinel copper and cobalt nanoferrites, to create NC that was made easily, cheaply, and quickly using autocombustion. Finally, against the evaluated Grampositive and Gram-negative species, both samples demonstrated excellent antibacterial effectiveness. As a result, their prospective use as antibacterial NPs in biomedical applications is suggested. The structural characteristics of combustion-produced nanocrystalline spinel ferrites have the chemical formula Mg0.8xCdxFe2O4 (x = 0.2, 0.4, and 0.6).