A　modified　multiwalled　carbon　nanotubes　(MWCNTs)　electrode　doped　with　a　rare　earth　metal,　cerium,　was　prepared　by　electrodeposition.　Scanning　electron　microscopy　showed　that　cerium　doping　altered　the　microstructure　and　crystal　orientation　of　the　electrode　surface,　and　the　resulting　electrode　displayed　a　uniform　and　compact　morphology.　X-ray　diffraction　and　X-ray　photoelectron　spectroscopy　confirmed　the　successful　deposition　of　CeO2　on　the　MWCNTs　substrate.　Cyclic　voltammetry　indicated　that　ceftazidime　degradation　on　the　modified　MWCNTs　electrode　was　irreversible.　The　Tafel　curve　showed　that　the　modified　electrode　had　a　relatively　high　positive　corrosion　potential　and　a　relatively　low　corrosion　current　density,　indicating　that　the　modified　electrode　could　sustain　a　certain　degree　of　corrosion.　The　degradation　effects　of　the　modified　MWCNTs　electrode　on　ceftazidime　were　evaluated　systematically　under　different　current　densities,　initial　pH,　supporting　electrolyte　concentration,　electrode　spacing,　and　initial　ceftazidime　concentration.　The　results　suggested　that　the　removal　efficiency　of　ceftazidime　with　an　initial　concentration　of　1mg　L-1　was　approximately　100%　after　60　min　electrolysis　in　a　1　g　L-1　Na2SO4　supporting　electrolyte　solution　with　a　current　density　of　3mAcm(-2)　and　an　electrode　spacing　of　1　cm.　The　possible　mechanism　of　ceftazidime　degradation　was　monitored　by　liquid　chromatography-mass　spectrometry.　(C)　2016　Elsevier　Ltd.　All　rights　reserved.