Catalytic ozonation treatment of papermaking wastewater by Ag-doped NiFe2O4 : Performance and mechanism  

作　　者：Junyu Zhao Jiashun Cao Yujie Zhao Teng Zhang Di Zheng Chao Li 

机构地区：[1]Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes,Ministry of Education,Hohai University,Nanjing 210098,China [2]College of Environment,Hohai University,Nanjing 210098,China [3]China United Engineering Corporation Limited,Zhejiang 310000,China

出　　处：《Journal of Environmental Sciences》2020年第11期75-84,共10页环境科学学报（英文版）

基　　金：supported by National Key R&D Program of China(No.2018YFC0406300);the operation for central university of Hohai University(No.2013/B18020148);A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions。

摘　　要：The catalytic ozonation treatment of secondary biochemical effluent for papermaking wastewater by Ag-doped nickel ferrite was investigated.Ag-doped catalysts prepared by sol-gel method were characterized,illustrating that Ag entirely entered the crystalline of Ni Fe2O4 and changed the surface properties.The addition of catalyst enhanced the removal efficiency of chemical oxygen demand and total organic carbon.The results of gas chromatography-mass spectrometer,ultraviolet light absorbance at 254 nm and threedimensional fluorescence excitation-emission matrix suggested that aromatic compounds were efficiently degraded and toxic substances,such as dibutyl phthalate.In addition,the radical scavenging experiments confirmed the hydroxyl radicals acted as the main reactive oxygen species and the surface properties of catalysts played an important role in the reaction.Overall,this work validated potential applications of Ag-doped Ni Fe2O4 catalyzed ozonation process of biologically recalcitrant wastewater.

关 键 词：Papermaking wastewater Secondary effluent Nickel ferrite Ag-doping Catalytic ozonation 

分 类 号：X793[环境科学与工程—环境工程]