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

作     者：Hui Zhang Jianguo Liu Changjin Ou Faheem Jinyou Shen Hongxia Yu Zhenhuan Jiao Weiqing Han Xiuyun Sun Jiansheng Li Lianjun Wang 

作者机构：Jiangsu Key Laboratory of Chemical Pollution Control and Resources ReuseSchool of Environmental and Biological EngineeringNanjing Universityof Science and TechnologyNanjing 210094China Beijing Changping Water AuthorityBeijing 102200China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2017年第29卷第3期

页      面：1-8页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

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) 

主　　题：Fenton Iron containing sludgeReuseNickel ferriteMagnetic catalyst 

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 （NiFe204） is proposed. Through a co-precipitation method followed by sintering at 800℃, magnetic NiFe204 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 spectros- copy. The synthesized NiFe204 could be used as an efficient catalyst in the heterogeneous Fenton process. In phenol degradation with H202 or NiFe204 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 NiFe204 and H202, phenol removal efficiency as high as 95% ± 3.4% could be achieved, indicating the excellent catalytic performance of NiFe204 in the heterogeneous Fenton process. Notably, a rapid electron exchange between --NiH and --Fem ions in the NiFe204 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.