Review Articles

Magnetic Catalysts for Environmental Remediation and Sustainable Chemical Processing: A Multidisciplinary Review

Elena Marković

Received 13 Jul 2026, Published online: 30 Jun 2026

Published in Volume 6, Issue 1, 2026, pages 21-24

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Abstract

Magnetic catalysts have emerged as multifunctional materials that combine catalytic activity with rapid separation under an external magnetic field. This combination addresses a persistent limitation of conventional homogeneous and nanoscale heterogeneous catalysts: difficult recovery from liquid reaction media. Magnetite, maghemite, spinel ferrites, magnetic biochars, core–shell nanoparticles, magnetic metal–organic frameworks, and noble-metal-decorated magnetic supports have been investigated for wastewater treatment, advanced oxidation, photocatalysis, heavy-metal transformation, organic synthesis, biomass conversion, hydrogenation, carbon–carbon coupling, and biodiesel production. Their magnetic cores permit catalyst recovery without energy-intensive centrifugation or filtration, while surface coatings and catalytic phases provide adsorption, oxidation, reduction, acid–base, or metal-mediated reaction sites. This multidisciplinary review examines the design, preparation, characterization, reaction mechanisms, environmental applications, and sustainable-processing potential of magnetic catalysts. Particular attention is given to heterogeneous Fenton and photo-Fenton reactions, peroxide and persulfate activation, photocatalytic pollutant degradation, reduction of nitroaromatic contaminants, recyclable palladium and nickel catalysts, and magnetic solid acids for renewable-fuel production. The effects of particle size, surface area, oxidation state, porosity, magnetic saturation, active-phase dispersion, and interfacial electron transfer are discussed. Although laboratory studies frequently demonstrate high catalytic activity and repeated magnetic recovery, practical deployment remains restricted by nanoparticle aggregation, metal leaching, surface passivation, loss of magnetization, complex water matrices, mass-transfer limitations, and insufficient life-cycle evaluation. Future research should prioritize non-toxic compositions, waste-derived supports, continuous-flow magnetic separation, standardized recyclability testing, process intensification, techno-economic analysis, and complete environmental-risk assessment. Magnetic catalysts can contribute significantly to circular chemical manufacturing when catalytic performance, recoverability, material safety, and resource efficiency are optimized simultaneously.

Keywords

  • magnetic catalysts
  • environmental remediation
  • heterogeneous Fenton reaction
  • photocatalysis
  • catalyst recovery
  • green chemistry
  • biomass conversion
  • sustainable chemical processing

References

  1. [1] He, Z., Gao, C., Qian, M., Shi, Y., Chen, J., and Song, S. “Electro-Fenton Process Catalyzed by Fe₃O₄ Magnetic Nanoparticles for Degradation of C.I. Reactive Blue 19 in Aqueous Solution: Operating Conditions, Influence, and Mechanism.” Industrial & Engineering Chemistry Research, 53, 3435–3447, 2014. doi:10.1021/ie403947b.
  2. [2] Xu, L., and Wang, J. “Magnetic Nanoscaled Fe₃O₄/CeO₂ Composite as an Efficient Fenton-Like Heterogeneous Catalyst for Degradation of 4-Chlorophenol.” Environmental Science & Technology, 46, 10145–10153, 2012. doi:10.1021/es300303f.
  3. [3] Zhang, S., et al. “Mechanism of Heterogeneous Fenton Reaction Kinetics Enhancement under Nanoscale Spatial Confinement.” Environmental Science & Technology, 2020. doi:10.1021/acs.est.0c02192.
  4. [4] Huang, X., Zhou, H., Yue, X., Ran, S., and Zhu, J. “Novel Magnetic Fe₃O₄/α-FeOOH Nanocomposites and Their Enhanced Mechanism for Tetracycline Hydrochloride Removal in the Visible Photo-Fenton Process.” ACS Omega, 6, 9095–9103, 2021. doi:10.1021/acsomega.1c00204.
  5. [5] Mao, H., et al. “Magnetically Separable Mesoporous Fe₃O₄@g-C₃N₄ as a Multifunctional Material for Adsorption, Photocatalysis, and Photoactivated Fenton Reactions.” Industrial & Engineering Chemistry Research, 2022. doi:10.1021/acs.iecr.2c01304.
  6. [6] Gui, Y., Guo, S., Lv, Y., Li, H., Zhang, J., and Li, J. “Coactivation of Hydrogen Peroxide Using Pyrogenic Carbon and Magnetite for Sustainable Oxidation of Organic Pollutants.” ACS Omega, 9, 6595–6605, 2024. doi:10.1021/acsomega.3c07525.
  7. [7] Zhu, M., and Diao, G. “Magnetically Recyclable Pd Nanoparticles Immobilized on Magnetic Fe₃O₄@C Nanocomposites: Preparation, Characterization, and Their Catalytic Activity toward Suzuki and Heck Coupling Reactions.” The Journal of Physical Chemistry C, 115, 24743–24749, 2011. doi:10.1021/jp206116e.
  8. [8] Baruwati, B., Guin, D., and Manorama, S. V. “Pd on Surface-Modified NiFe₂O₄ Nanoparticles: A Magnetically Recoverable Catalyst for Suzuki and Heck Reactions.” Organic Letters, 9, 5377–5380, 2007. doi:10.1021/ol702064x.
  9. [9] Veisi, H., Karmakar, B., Tamoradi, T., Tayebee, R., Sajjadifar, S., Lotfi, S., Maleki, B., and Hemmati, S. “Bio-Inspired Synthesis of Palladium Nanoparticles Fabricated Magnetic Fe₃O₄ Nanocomposite over Fritillaria imperialis Flower Extract as an Efficient Recyclable Catalyst for the Reduction of Nitroarenes.” Scientific Reports, 11, 4515, 2021. doi:10.1038/s41598-021-83854-1.
  10. [10] Ji, F., Wang, B., and Zhang, L. “Light-Triggered Catalytic Performance Enhancement Using Magnetic Nanomotor Ensembles.” Research, 2020, 6380794, 2020. doi:10.34133/2020/6380794.
  11. [11] Zhang, F., Tian, X., Shaha, M., and Yang, W. “Synthesis of Magnetic Carbonaceous Acids Derived from Hydrolysates of Jatropha Hulls for Catalytic Biodiesel Production.” RSC Advances, 7, 2017. doi:10.1039/C6RA28796D.
  12. [12] Gonçalves, M. A., dos Santos, H. C. L., da Silva, P. M. M., Correa, A. P. L., Ribeiro, T. S., Sobrinho, I. A., Rocha Filho, G. N., and da Conceição, L. R. V. “Catalytic Conversion of Residual Raw Material into Biodiesel Using a Superior Magnetic Solid Acid Catalyst Based on Zn–Fe Ferrite: Thermodynamic and Kinetic Studies.” RSC Advances, 2024. doi:10.1039/D4RA03580A.
  13. Qazi, M. A., & Sohail, N. (2026). Factors influencing the intention to engage in socially responsible investing. Journal of Economic Innovation and Development, 1(1), 21–30. https://doi.org/10.65072/jeid.v1i1.3
  14. Mousumi, A., & Sohail, N. (2026). Service quality, engagement, and loyalty in Malaysian telecom. International Journal of Business and Social Science Studies, 6(1). https://ijbsss.com/index.php/IJBSSS/index
  15. Singh, H. S. J., & Sohail, N. (2026). Medical negligence in Malaysian hospitals: A qualitative thematic analysis of organisational and governance failures. Journal of Innovation and Research in Technology, 3(2). https://doi.org/10.66857/jirt.v3i2.38
  16. Asad, M. M., & Sohail, N. (2026a). The influence of vlog marketing on consumer purchase decision-making in Malaysia: The mediating role of consumer engagement. Global Media and Social Sciences Research Journal, 7(2).
  17. Asad, M. M., & Sohail, N. (2026b). Vlog marketing and customer decision-making: A review of the mediating roles of customer engagement and brand perception in the Malaysian context. An integrative literature review and conceptual framework. Asian Journal of Research in Business and Management, 3(1).

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© 2026 Journal of Magnetism and Its Applications. This article is published under CC BY 4.0.

How to cite

Elena Marković , E. M. (2026). Magnetic Catalysts for Environmental Remediation and Sustainable Chemical Processing: A Multidisciplinary Review. Journal of Magnetism and Its Applications, 6(1), 21-24.

How to Cite

Magnetic Catalysts for Environmental Remediation and Sustainable Chemical Processing: A Multidisciplinary Review. (2026). Journal of Magnetism and Its Applications, 6(1), 21-24. https://jourmag.org/index.php/jma/article/view/149