摘要
以人造沸石(Al_(2)O_(3)和SiO_(2)为主要成分)作为催化剂的载体,负载过渡金属Mn、Cu,贵金属Ag和稀土元素Ce,采用浸渍法制备Mn-Cu-Ag-CeOx/沸石催化剂,并耦合臭氧催化氧化技术处理含酚废水。结果表明,在焙烧时间为4.5 h、温度为450℃时催化剂的催化效果最好,在臭氧投加量为2.5 mg/min、催化剂投加质量分数为5%、pH为8.7(原水)的工况下,处理0.4 L含酚废水60 min,总酚和COD的去除率分别达到73%和74%,出水COD为51.57 mg/L,总酚的质量浓度为10.32 mg/L。催化剂中的活性因子可促进羟基自由基的产生,使用催化剂的情况下可将臭氧利用率提高25.4%。
Using artificial zeolite(mainly Al_(2)O_(3)and SiO_(2))as catalyst carrier,the transition metals Mn,Cu,Ag and rare earth element Ce were loaded,Mn-Cu-Ag-CeOx/zeolite catalyst was prepared by impregnation method,and the phenol-containing wastewater was treated by coupling ozone catalytic oxidation technology.The pretreatment methods and manufacturing methods for multi-metal catalyst carriers was provided,two preparation process parameters of calcination time and calcination temperature were investigated,and the degradation effects of ozone dosage,catalyst dosage and pH on phenolic substances and COD in wastewater were investigated.The experiment showed that,the catalyst had the best catalytic effect when the calcination time was 4.5 h and the calcination temperature was 450℃.Under the optimized conditions of ozone dosage of 2.5 mg/min,catalyst dosage percentage of 5%and pH of 11,after treating 0.4 L phenol-containing wastewater for 60 min,the removal rates of total phenol and COD reached 73%and 74%,respectively,and the COD reached 51.57 mg/L and total phenol reached 10.32 mg/L in final effluent.The active factor in the catalyst could promote the generation of hydroxyl radical,and the ozone utilization rate could be increased by 25.4%when the catalyst was used.
作者
姜帅臣
孙文全
孙永军
周俊
JIANG Shuaichen;SUN Wenquan;SUN Yongjun;ZHOU Jun(School of Urban Construction,Nanjing Tech University,Nanjing 211800,China)
出处
《水处理技术》
CAS
CSCD
北大核心
2021年第11期42-47,共6页
Technology of Water Treatment
基金
国家重点研发计划资助(2017YFB0602500)
江苏省第十五批“六大人才高峰”高层次人才资助项目(JNHB-038)。
关键词
人造沸石
臭氧催化
含酚废水
artificial zeolite
catalytic ozonation
phenol-containing wastewater
