Environmental Science and Pollution Research

, Volume 25, Issue 30, pp 30575–30584 | Cite as

Preparation and application of magnetic nitrogen-doped rGO for persulfate activation

  • Ya Pang
  • Kun LuoEmail author
  • Lin TangEmail author
  • Xue Li
  • Yong Song
  • Cheng-yong Li
  • Li-ping Wang
Research Article


A heterogeneous catalyst (M-N-rGO) composed of stability enhanced magnetic iron oxide nanoparticles and nitrogen-doped reduced graphene oxide was synthesized and characterized by SEM, XRD, BET, and XPS. It showed excellent catalytic degradation properties in advanced oxidation technology. In the presence of 200 mg/L catalyst and 135 mg/L persulfate at pH 5, 95% of 10–20 mg/L methylene blue could be degraded in 90 min with the TOC removal efficiency of 50%. The rate constant based on pseudo-first-order kinetics ranged from 0.0227 to 0.0488/min in the temperature range of 15 to 32 °C, and the activation energy was 32.5 kJ/mol. Under the optimal operation conditions, 20 mg/L of 2,4-dichlorophneol (2,4-DCP) could be removed almost completely. EPR analysis showed that sulfate and hydroxyl radicals were responsible for degradation of pollutants, and radical quenching experiments indicated that nonradical pathway also played a role in pollutant removal. And a mechanism for M-N-rGO and persulfate system was elucidated. This catalyst was easy for preparation, low-cost, highly effective, convenient for separation, and could be used effectively for four times through 0.1 mol/L H2SO4 regeneration. It provided a choice for wastewater treatment in practice.


Nitrogen-doped graphene oxide Magnetic nanoparticles Sulfate radical Wastewater treatment Advanced oxidation technology 


Funding information

This work was financially supported by the National Natural Science Foundation of China (No. 51409024, 51579096, 51404041), the Natural Science Foundation of Hu Nan China (2017JJ3341), and science and technology project of Changsha China (ZD1601017, ZD1601058).

Supplementary material

11356_2018_2974_MOESM1_ESM.docx (3.1 mb)
ESM 1 (DOCX 3156 kb)


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.College of Biology and Environmental EngineeringChangsha UniversityChangshaChina
  2. 2.Department of Agricultural and Biological EngineeringUniversity of FloridaGainesvilleUSA
  3. 3.College of Environmental Science and EngineeringHunan universityChangshaChina

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