Arsenic　contamination　has　been　a　global　environmental　issue.　In　this　study,　the　typical　phenylarsonic　acid,　named　p-ASA,　was　selected　as　the　target　pollutant　to　investigated　the　adsorption　behaviour　and　mechanism　of　zinc-iron-zirconium　metallic　oxide　(ZnFeZrOx)　prepared　by　hydrothermal　method.　The　results　indicated　that　95.15%　of　p-ASA　was　absorbed　on　the　ZnFeZrOx　under　the　optimal　conditions:　pH4,　60　℃,　ZnFeZrOx　dosage　of　2.2　g·L−1,　and　initial　p-ASA　concentration　of　50　mg·L−1.　The　adsorption　process　was　in　accordance　with　the　Freundlich　isothermal　adsorption　model　and　quasi-secondary　kinetic　model,　and　the　maximum　adsorption　capacity　was　595.23　mg·g−1.　In　the　experiment　of　adsorption　of　livestock　breeding　wastewater,　the　removal　rate　maintained　at　a　high　level　(84.92%).　In　addition,　ZnFeZrOx　showed　a　good　chemical　stability　during　p-ASA　adsorption,　Fe-OH　was　the　main　adsorption　active　site,　and　Zn-O　and　Zr-O　played　a　certain　role.　After　three　times　of　recycle,　the　removal　efficiency　of　p-ASA　still　reached　higher　than　70%,　manifesting　that　ZnFeZrOx　had　a　good　regeneration　performance.　©　2023　Science　Press.　All　rights　reserved.