Degradation of dye wastewater by persulfate activated with Fe3O4/graphene nanocomposite

Journal of Water Reuse and Desalination

Gong, Xiao-Bao¹ 

[1] School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, Jiangxi, China

关键词: magnetic nanoparticles;    methylene blue;    persulfate;    reuse;    sulfate radicals;   

DOI  :  10.2166/wrd.2016.187

学科分类：工程和技术（综合）

来源: IWA Publishing

【 摘 要 】

In this study, Fe3O4/graphene nanocomposite was synthesized through a liquid-phase co-precipitation method and characterized using X-ray diffraction and Fourier transform infrared spectrometer. The synthetic Fe3O4/graphene was used as a heterogeneous catalyst to activate persulfate to efficiently degrade methylene blue (MB). The target pollutant MB can be degraded by sulfate radicals depending on several parameters including persulfate and Fe3O4/graphene concentrations, pH and reaction temperature. Within 120 min of reaction time, almost 100% of 0.05 mM MB was removed by 1.5 mM persulfate in the presence of 150 mg/L of Fe3O4/graphene at pH = 6.0 and 25 °C. The degradation of MB was found to follow the pseudo-first-order kinetic model. The Fe3O4/graphene has much better stability and reusability than free Fe3O4 suggested by reuse tests. The results demonstrate that Fe3O4/graphene activated persulfate is a promising technology for remediation of water pollution caused by organic contaminants.

【 授权许可】

CC BY-NC-ND