Abstract: Residual flotation reagents in beneficiation wastewater will have important impact on environment and human life.And thus，how to degrade flotation reagents effectively has drawn extensive attraction of researchers.The degradation characteristics of sodium diethyldithiocarbamate in solution were investigated in this paper.The results indicated that，increase of temperature and reaction time were beneficial to sodium diethyldithiocarbamate degradation，and the degradation rate of sodium diethyldithiocarbamate in acidic was much higher than that in neutral and alkaline conditions.The addition of oxidant could effectively improve the degradation rate of sodium diethyldithiocarbamate.When the solution pH was 5.98，reaction temperature was 25 ℃ and reaction time was 5.5 h，the degradation rate of sodium diethyldithiocarbamate will reach to 88.40%.Degradation of sodium diethyldithiocarbamate will be enhanced with the addition of H₂O₂.With the increase of H₂O₂ dosage，degradation of sodium diethyldithiocarbamate increased sharply at first and then kept stable.When the dosage of H₂O₂ is 8.00×102 mg/L and reaction time was 5 min，the maximum degradation rate of diethyldithiocarbamate was obtained，which was 99.69%.The results could provide useful reference for the processing of sodium diethyldithiocarbamate contamination wastewater.

Key words: Sodium diethyldithiocarbamate, Degradation, H₂O₂