title: Reuse of Fenton sludge as an iron source for NiFe2O4synthesis and its application in the Fenton-based process.
abstract: 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 (NiFe2O4) is proposed. Through a co-precipitation method followed by sintering at 800°C, magnetic NiFe2O4particles 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 NiFe2O4could be used as an efficient catalyst in the heterogeneous Fenton process. In phenol degradation with H2O2or NiFe2O4alone, the phenol removal efficiencies within the reaction time of 330min were as low as 5.9%±0.1% and 13.5%±0.4%, respectively. However, in the presence of both NiFe2O4and H2O2, phenol removal efficiency as high as 95%±3.4% could be achieved, indicating the excellent catalytic performance of NiFe2O4in the heterogeneous Fenton process. Notably, a rapid electron exchange between NiIIand FeIIIions in the NiFe2O4structure 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.
authors.affiliation: Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Zhang
authors.affiliation: Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
authors.forename: Jianguo
authors.initials: J
authors.lastname: Liu
authors.affiliation: Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
authors.forename: Changjin
authors.initials: C
authors.lastname: Ou
authors.affiliation: Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
authors.lastname: Faheem
authors.affiliation: Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China. Electronic address: shenjinyou@mail.njust.edu.cn.
authors.forename: Jinyou
authors.initials: J
authors.lastname: Shen
authors.affiliation: Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
authors.forename: Hongxia
authors.initials: H
authors.lastname: Yu
authors.affiliation: Beijing Changping Water Authority, Beijing 102200, China.
authors.forename: Zhenhuan
authors.initials: Z
authors.lastname: Jiao
authors.affiliation: Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
authors.forename: Weiqing
authors.initials: W
authors.lastname: Han
authors.affiliation: Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
authors.forename: Xiuyun
authors.initials: X
authors.lastname: Sun
authors.affiliation: Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
authors.forename: Jiansheng
authors.initials: J
authors.lastname: Li
authors.affiliation: Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China. Electronic address: wanglj@mail.njust.edu.cn.
authors.forename: Lianjun
authors.initials: L
authors.lastname: Wang
mesh_terms: D005290:Ferric Compounds / Q000737:chemistry*; D007501:Iron / Q000737:chemistry; D008956:Models, Chemical; D009532:Nickel / Q000737:chemistry*; D019800:Phenol; D010636:Phenols; D013052:Spectrometry, X-Ray Emission; D017550:Spectroscopy, Fourier Transform Infrared; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry
chemical_list: D005290:Ferric Compounds; D010636:Phenols; D014874:Water Pollutants, Chemical; C550717:nickel ferrite; D019800:Phenol; D009532:Nickel; D007501:Iron
keywords: Fenton; Iron-containing sludge; Magnetic catalyst; Nickel ferrite; Reuse