The　escalating　threats　posed　by　industrial　wastewater　discharge　and　offshore　crude　oil　spills　necessitate　the　development　of　cost-effective,　environmentally　friendly　adsorbents.　In　this　study,　stearic　acid-modified　(SA)　magnetic　porous　hydroxyapatite　(HAP)　microspheres　were　prepared　by　hydrothermal　synthesis.　Abalone　shell　particles　were　employed　as　the　calcium　source,　and　Fe3O4　nanoparticles　(nFe3O4)　or　industrial　iron　tetraoxide　particles　(Fe3O4)　were　selected　as　the　magnetic　source.　The　microsphere　(SA/nFe3O4-HAP)　demonstrated　enhanced　superhydrophobicity,　lipophilicity　and　increased　specific　surface　area,　with　an　oil　absorption　capacity　of　6.518　g/g.　Notably,　compared　to　SA/Fe3O4-HAP,　the　magnetic　particles　on　SA/nFe3O4-HAP　exhibited　more　even　dispersion.　The　excellent　superparamagnetism　and　hydrophobicity　of　SA/nFe3O4-HAP　facilitated　its　dispersion　in　crude　oil,　enabling　efficient　magnetic　separation.　After　five　cycles,　the　adsorption　efficiency　remained　high　4.213　g/g,　signifying　its　good　recyclability.　In　conclusion,　this　environmentally　friendly　adsorbent　demonstrates　synergistic　efficacy　in　addressing　marine　oil　spills　and　discarded　shell　pollution,　offering　a　potential　balance　between　environmental　and　economic　benefits.　©　2025