According to Kumar M. et al., magnetic biopolymer beads consisting of zinc ferrite and alginate (ZFN-Alg) are an affordable alternative for eliminating Pb (II) and Cu (II) metal ions from both single and binary systems, as found in the current work. When Pb (II) and Cu (II) ions were investigated for adsorption on ZFN-Alg beads in batch mode, the results revealed that these beads still had a regeneration effectiveness of about 80% even after five cycles. This study highlights the promise of magnetic biopolymer beads as a practical and costeffective solution for removing lead (Pb(II)) and copper (Cu(II)) ions from contaminated water. Atul Sharma, et al. produced a magnetic NC made of cobalt ferrite and occimum sanctum. The analysis revealed that the NC has strong magnetic characteristics and could be an economical adsorbent for wastewater treatment technologies. It was examined for its capability to adsorb MB and CV, two cationic dyes, and both tests revealed a high capacity. As a result of these findings, the Cobalt ferrite-Occimum sanctum NC is a promising contender for wastewater treatment applications. Chitosan beads entrapping magnetic cobalt ferrite with amine functionalization (NH2-CF-CB) are a cost-effective and highly efficient adsorbent. These beads possess exceptional adsorption capabilities, making them ideal for reducing water pollution. They can effectively remove MG, an organic pollutant, as well as Cu (II) ions, an inorganic contaminant. In addition, these beads are reusable and can be easily separated from the water. The Langmuir adsorption isotherm model was used to evaluate the maximum adsorption capacities of MG and Cu (II) ions on NH2-CF-CB. The maximum adsorption capacity for MG was found to be 357.16 mg/g, while for Cu (II) ions, it was 158.73 mg/g. Joshi et al. made PANI and Mn0.25Co0.75Fe2O4 (MCF) NCs with 0, 10, 20, 50, and 100 weight percentages of MCF to break down CV dye under sun radiation. PANI/MCF NCs were made by in-situ chemical oxidative polymerization of aniline. XRD and FTIR showed pure phase development in all samples. MCF and PANI/MCF crystallite diameters were 20-30 nm. PANI/MCF NCs with 10 and 20 wt% MCF degrade CV dye efficiently. The degradation efficiency of 10 and 20 wt% PANI/MCF NCs was 77% and 89% in 75 mins. The research showed that heterogeneous photocatalysts with reduced optical band gaps work. Maximum degradation rate constants were 0.5 and 0.7 min-1 for PANI/MCF NCs with 10 and 20 wt% MCF. Hosseini et al. synthesized CoFe2O4 NPs by a simple chemical precipitation technique. The dialytic rate of the magnetic PVC-CoFe2O4 membrane was superior to that of the pristine PVC membrane in removing chromium ions. The considerable affinity of NPs with magnetic properties for heavy metal ion adsorption is the main reason for this effect. Kaur, et al. explained the ES technique used to create a novel nanofiber membrane consisting of Co0.5Ni0.5Fe2O4-PVDF. The Co0.5Ni0.5Fe2O4 NPs were synthesized using the sol-gel combustion method. The results of their comprehensive analysis suggest that spintronics devices, magnetic sensors, and ferrite-based nanofiber membranes have a high potential for competition. A.R. Sadrolhosseini et al. produced composite layers of polypyrrole, chitosan, and nickel-ferrite NPs at varied times using the electrochemical method. The surface plasmon resonance technique was then used to analyze the PPy-Chi/NiFe2O4-NPs to find heavy metal ions in aqueous solutions, such as Ni, Fe, Co, Al, Mn, Hg, and Pb. Comparing the sensing layer to other sensing layers, including polypyrrole and polypyrrole chitosan, it showed a better capacity to detect paramagnetic substances and was proven to be more sensitive. Abou Hammad, A.B. et al. produced a biodegradable, semiconducting, and antibacterial cellulosic composite that in-situ polymerizes PANI in the presence of cellulose. This composite magnetic property was obtained by adding cobalt ferrite NPs (CFO-NPs) during the polymerization process. The CFO-NPs produced by the sol-gel method had an average particle size of less than 50 nm. Because of its exceptional biodegradability and antibacterial efficacy against Candida albicans, Escherichia coli, and Bacillus subtilis, the electromagnetic NC was generated. Tatarchuk, et al. developed a magnetic core-shell adsorbent by immobilizing TiO2 nanoclusters on the cobalt ferrite NPs. Ethylene glycol and citric acid were used as chelating agents in a modified Pechini sol-gel synthesis. They conducted a detailed analysis of the shape and structure of pure CoFe2O4, reference TiO2, and the resulting CoFe2O4@TiO2 NC shown in Figure . The CoFe2O4@TiO2 NC was found to have an adsorption efficacy that was more than twice as high as that of TiO2 and CoFe2O4 alone. The observed synergistic effect can only be attributed to the formation of deformed titania nanocrystals. The magnetic nano adsorbents that were found were successful in eliminating dichromate anions (83% removal) and CR dye (61% removal) from water. Fe1-xMnxFe2O4 may have uses in biological applications, such as MRI contrast agents and cancer therapy for hyperthermia. They also studied GOmanganese ferrite (GMF) to remove As (V) ions through adsorption-filtration. The newly created adsorptive MMMs have the potential to be used as a single treatment approach for the removal of As (V) ions. Polymer bimetal complexes were utilised to synthesise nitrogen-doped mesoporous carbon embedded with NiFe2O4-NC, which was then employed to extract Hg 2+ from aqueous medium. The proposed method employs a single-source precursor to create NiFe2O4 nanocrystals incorporated into a nitrogen-doped graphitised carbon matrix. This technique can produce an extremely effective magnetic adsorbent to eliminate harmful pollutants from contaminated water. Table . Polymer-based spinel metal ferrite NC materials for efficient removal of harmful substances from water. In a fixed bed column, binary dyes were removed using an alginate-cobalt ferrite (ACF) as a nanosorbent. The bed depth and flow rate caused the binary adsorption. The study showed that a considerable bed depth and a reduced flow rate were needed to effectively sequestrate binary dyes. The characteristics of the ACF in powder form are ideal candidates: easy preparation, cheap cost, biocompatibility, renewable, mechanical separability, no formation of secondary pollutants, and environmental friendliness. The outcomes demonstrated ACF's efficiency when applied to eliminate binary dyes. Researchers employed nitrilotriacetic acid (NA) as a chelating agent to coordinate with iron (Fe(II)) and manganese (Mn(II)) ions in various ratios during the thermal decomposition synthesis of porous magnetic ferrite nanowires. Two distinct types of nanowires were successfully produced: one containing pure MnFe2O4 and another containing manganese-doped Fe3O4. These porous nanowires demonstrate a remarkable ability to remove heavy metal ions and organic pollutants from wastewater. The research suggests that these magnetic ferrites have broader applicability in fields beyond water treatment, potentially extending to areas like biotechnology and lithium-ion battery technology. Martins, et al. focused on creating novel magnetoelectric (ME) material polymer NCs that display a customised ME response at room temperature. The three distinct ferrite NPs, Zn0.2Mn0.8Fe2O4 (ZMFO), CoFe2O4 (CFO), and Fe3O4 (FO), are the basis for the multiferroic NCs, which are disseminated in a matrix of the piezoelectric copolymer poly (vinylidene fluoridetrifluoroethylene, or P(VDF-TrFE)). The ME response of ZMFO/P(VDF-TrFE), on the other hand, revealed little hysteresis and a strong dependency on the ZMFO filler content. Potential novel uses have been discussed for these ferrite/PVDF NCs, including memories and information storage, signal processing, ME sensors, and oscillators. An in situ chemical oxidation method was used by Katowah, D. F., et al. to create nanostructured ternary NCs made up of chitosan (CS), CoFe2O4 (CF) NPs and a Poly (Pyrrole-co-O-Toluidine) matrix (P(Py-coOT)). A Co 2+ ion detection electrochemical sensor was made using P(Py-co-OT)/CF/CS NCs. The CS and P(Py-co-OT) layers are applied uniformly to the CF NPs. The P(Py-co-OT)/CF/CS NCs are promising Co 2+ ion sensors due to their excellent detection limit, sensitivity, and electrical interaction. For values between 0.1 nM and 0.1 mM, the Co 2+ sensor responded to Co 2+ linearly. The performance and response times of the proposed Co 2+ ion sensor are satisfactory and repeatable. Jayalakshmi, R. et al. researched the structural characterization of the ex-situ produced alginate-cobalt ferrite NC (CoFe2O4-ANa NC), the current communication's primary focus. CoFe2O4 NPs stabilisation of sodium alginate has been demonstrated by the characterisation results. As a result, the alginatecobalt ferrite NC was shown to have enhanced particle distribution, fewer and smaller particle agglomerates, increased crystallinity, and increased surface area. Researchers investigated the potential of a composite material, MFN-alginate, for removing dyes from wastewater. MFN-alginate is comprised of magnetic ferrite NPs and alginate. The study assessed its ability to remove model dyes (Basic Blue 9, Basic Blue 41, and Basic Red 18) from both individual dye solutions (single systems) and mixtures of these dyes (binary systems).