Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China.
China United Engineering Corporation Limited, Zhejiang 310000, China.
J Environ Sci (China). 2020 Nov;97:75-84. doi: 10.1016/j.jes.2020.04.014. Epub 2020 Jun 7.
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 NiFeO 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 three-dimensional 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 NiFeO catalyzed ozonation process of biologically recalcitrant wastewater.
采用掺银镍铁氧体对造纸中段生化废水进行催化臭氧化处理。采用溶胶-凝胶法制备的掺银催化剂进行了表征，表明银完全进入了 NiFeO 的晶体结构并改变了表面性质。催化剂的添加提高了化学需氧量和总有机碳的去除效率。气相色谱-质谱联用、254nm 紫外吸光度和三维荧光激发-发射矩阵的结果表明，芳香族化合物得到了有效降解，邻苯二甲酸二丁酯等有毒物质也得到了去除。此外，自由基清除实验证实了羟基自由基是主要的活性氧物种，催化剂的表面性质在反应中起着重要作用。总的来说，这项工作验证了掺银镍铁氧体催化臭氧化处理难生物降解废水的潜在应用。
