Reuse of Fenton sludge as an iron source for NiFe_2O_4 synthesis and its application in the Fenton-based process

查看全文 作　　者：Hui [1]Zhang;Jianguo [1]Liu;Changjin [1]Ou;[1]Faheem;Jinyou [1]Shen;Hongxia [1]Yu;Zhenhuan [2]Jiao;Weiqing [1]Han;Xiuyun [1]Sun;Jiansheng [1]Li;Lianjun [1]Wang

机构地区：[1]Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse,School of Environmental and Biological Engineering,Nanjing Universityof Science and Technology,Nanjing 210094,China;[2]Beijing Changping Water Authority,Beijing 102200,China

出　　处：《Journal of Environmental Sciences》索引2017年第29卷第3期,共8页

基　　金：supported by the Major Project of Water Pollution Control and Management Technology of China(No.2012ZX07101-003-001);the Fundamental Research Funds for the Central Universities(No.30916011312) 摘　　要：The potentially hazardous iron-containing sludge from the Fenton process requires proper treatment and disposal, which often results in high treatment cost. In this study, a novel method for the reuse of Fenton sludge as an iron source for the synthesis of nickel ferrite particles(NiFe_2O_4) is proposed. Through a co-precipitation method followed by sintering at 800°C, magnetic NiFe_2O_4 particles were successfully synthesized, which was confirmed by powder X-ray diffraction(XRD), scanning electronic microscopy(SEM), energy dispersive spectroscopy(EDS), Fourier transform infrared spectroscopy(FT-IR) and Raman spectroscopy. The synthesized NiFe_2O_4 could be used as an efficient catalyst in the heterogeneous Fenton process. In phenol degradation with H_2O_2 or NiFe_2O_4 alone, the phenol removal efficiencies within the reaction time of 330 min were as low as 5.9% ± 0.1% and 13.5% ±0.4%, respectively. However, in the presence of both NiFe_2O_4 and H_2O_2, phenol removal efficiency as high as 95% ± 3.4% could be achieved, indicating the excellent catalytic performance of NiFe_2O_4 in the heterogeneous Fenton process. Notably, a rapid electron exchange between_Ni II and_Fe III ions in the NiFe_2O_4 structure could be beneficial for the Fenton reaction. In addition, the magnetic catalyst was relatively stable, highly active and recoverable, and has potential applications in the Fenton process for organic pollutant removal. 关键词：FENTON Iron-containing sludge REUSE Nickel ferrite Magnetic catalyst

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Reuse of Fenton sludge as an iron source for NiFe_2O_4 synthesis and its application in the Fenton-based process

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