Magnetic　CoFe　alloy@N-doped　graphitic　carbon　(CoFe@NC)　encapsulated　in　chitosan　carbonized　microspheres　(CoFe@NC/CCM)　was　synthesized,　then　coupled　with　peroxymonosulfate　(PMS)　for　atrazine　(ATZ)　removal.　CoFe@NC　derived　from　Co-Fe　Prussian　blue　analogues　were　embedded　into　CCM　by　the　alkaline　gelcarbonization　process,　in　which　CCM　formed　a　protective　layer　for　CoFe@NC.　The　morphology,　crystal　structure,　and　material　composition　of　CoFe@NC/CCM　were　characterized.　The　effects　of　catalyst　dosages,　PMS　dosages,　initial　pH,　temperature,　coexisting　anions,　natural　organic　matter　(NOM),　and　different　practical　water　matrices　were　systematically　investigated.　The　productivity　test　was　performed　under　the　conditions　of　[PMS]　=　0.4　mM,　pHi　=　5.9,　T　=　25　degrees　C,　ATZ　=　30　mg/L　and　[CoFe@NC-600/CCM]　=　4　mg/L,　the　stability　upon　reuse　for　8　days　was　studied　and　the　accumulated　turnover　number　was　determined　to　be　46.8　after　an　8-day　cycle.　Electron　paramagnetic　resonance　(EPR)　technology　and　radical　quenching　tests　revealed　.OH　and　SO4.-　were　major　radicals,　with　contribution　rates　of　49.2%　and　42.9%,　respectively.　Fe0　-＞　equivalent　to　FeII　＜-＞　equivalent　to　FeIII　and　Co0　-＞　equivalent　to　CoII　＜-＞　equivalent　to　CoIII　redox　cycles　were　involved　in　the　catalytic　reaction.　The　toxicity　effect　of　transformation　products　(TPs)　on　activated　sludge　was　also　evaluated.　Based　on　quantitative　structure-activity　relationship　model　prediction,　the　comprehensive　toxicity　of　ATZ　and　TPs　was　analyzed　and　compared　by　the　toxicity　estimation　software　tool.　Results　showed　that　most　TPs　toxicity　decreased　or　disappeared.　This　work　proposes　an　environmentally　friendly　and　easy-to-recycle　heterogeneous　catalyst　to　remove　refractory　organics　by　activating　PMS.