针对维C废水在二级生化处理后很难达到排放标准的问题,以铁铝混合粉末作为载体(Fe2O3/Al2O3,FA)与其他金属氧化物粉末混合掺杂,通过滚动造粒法制备混合金属氧化物(MMO)臭氧催化剂,用于降解维C生化废水.结果表明,CuO、Ni2O3 协同催化,所制备的MMO臭氧催化剂Cu-Ni/FA具有较好的催化性能和力学性能.通过SEM、TEM、BET、XRD、XPS对样品的理化性能进行表征,发现催化体系中NiFe2O3 和Cu4 O3 发挥了重要作用.在废水COD浓度为248.31 mg/L,pH为7,催化剂投加量35g/L以及臭氧浓度10 mg/L条件下,60 min 时COD去除效率达到70%.超声120 min后催化剂脱落率为2.724%,对每次超声后的催化剂进行催化臭氧氧化实验,COD去除率为65%～69%,表明该催化剂具有良好的抗脱落性和稳定性.
Degradation of vitamin C biochemical wastewater by Fe2O3/Al2O3 modified mixed metal oxides
To address the problem that vitamin C wastewater is difficult to meet the discharge standard af-ter secondary biochemical treatment.The mixed metal oxide(MMO)ozone catalysts were prepared for the degradation of vitamin C biochemical wastewater by using mixed iron and aluminum powders as the carri-ers(Fe2O3/Al2O3,FA)doped and mixed with other metal oxide powders by the rolling granulation meth-od.The results showed that the MMO ozone catalyst Cu-Ni/FA prepared by the synergistic catalysis of CuO and Ni2 O3 had better catalytic and mechanical properties.The physicochemical properties of the sam-ples were characterized by SEM,TEM,BET,XRD,and XPS,and it was found that NiFe2O3 and Cu4 O3 played an important role in the catalytic system.Under the conditions of wastewater COD concentration of 248.31 mg/L,pH 7,catalyst addition of 35 g/L,and ozone dosage of 10 mg/L,the COD removal efficien-cy reached 70%at 60 min.The catalyst shedding rate was 2.724%after 120 min of ultrasonication,and the catalytic ozone oxidation experiments were carried out on the catalyst after each ultrasonication.The COD removal rate was 65%～69%,which indicated that the catalyst had good anti-shedding properties and stability.
metal oxidemixed dopingozone catalytic oxidationvitamin C wastewater
NETL
NSTL
万方数据
