TiO2、Cu2O和氧化石墨烯复合氧化垃圾渗滤液效能

针对垃圾渗滤液中成分复杂的污染物,在自然光照条件下,使用TiO₂/氧化石墨烯、Cu₂O/氧化石墨烯和TiO₂/Cu₂O三种复合催化剂分别对垃圾渗滤液原液进行催化氧化。结果表明,3种复合催化剂中,TiO₂/氧化石墨烯复合催化剂对有机物的去除效果最好,当催化剂与渗滤液COD的质量比为0.7时为该催化剂的最佳投加量,最佳反应时间为2 h。在最佳试验条件下,对垃圾渗滤液原液进行催化氧化后,对COD的去除率达到92.57%,此时渗滤液出水COD为964.79mg/L,出水NH4⁺-N为2015.84 mg/L,BOD₅/COD值达到0.83。

Combined Oxidation Efficiency of Landfill Leachate by TiO2,Cu2O and Graphene Oxide

In view of the complex composition of pollutants in landfill leachate,three composite catalysts including TiO₂/graphene oxide(GO),Cu₂O/GO and TiO₂/Cu₂O were used for catalytic oxidation of raw landfill leachate under natural light conditions.Among the three kinds of composite catalysts,the TiO₂/GO composite catalyst had the best treatment effect on organic matters in landfill leachate.The optimum dosage of catalyst was obtained when mass ratio of catalyst and leachate COD was 0.7,and the best reaction time was 2h.Under the optimum experimental conditions,the removal efficiency of COD reached 92.57%after catalytic oxidation of the raw landfill leachate.At this time,concentrations of COD and NH4⁺-N in the effluent were 964.79 mg/L and 2015.84 mg/L,and the BOD₅/COD value reached 0.83.