Effective degradation of rhodamine B by electro-Fenton process, using ferromagnetic nanoparticles loaded on modified graphite felt electrode as reusable catalyst: in neutral pH condition and without external aeration

Jiangnan Tian; Jixiang Zhao; Ayobami Matthew Olajuyin; Moustafa Mohamed Sharshar; Tingzhen Mu; Maohua Yang; Jianmin Xing

doi:10.1007/s11356-016-6721-2

Effective degradation of rhodamine B by electro-Fenton process, using ferromagnetic nanoparticles loaded on modified graphite felt electrode as reusable catalyst: in neutral pH condition and without external aeration

Environ Sci Pollut Res Int. 2016 Aug;23(15):15471-82. doi: 10.1007/s11356-016-6721-2. Epub 2016 Apr 27.

Authors

Jiangnan Tian^{1

2}, Jixiang Zhao³, Ayobami Matthew Olajuyin¹, Moustafa Mohamed Sharshar¹, Tingzhen Mu^{1

2}, Maohua Yang¹, Jianmin Xing⁴

Affiliations

¹ National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China.
² School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China.
³ School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
⁴ National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China. jmxing@ipe.ac.cn.

PMID: 27117155
DOI: 10.1007/s11356-016-6721-2

Abstract

Polytetrafluoroethylene/ferromagnetic nanoparticle/carbon black (PTFE/MNP/CB)-modified graphite felt (GF) was successfully applied as cathode for the mineralization of rhodamine B (RhB) in electro-Fenton (EF) process. The modified cathode showed high decolorization efficiency for RhB solution even in neutral pH condition and without external aeration, achieving nearly complete decolorization and 89.52 % total organic carbon (TOC) removal after 270-min oxidation with the MNP load 1.2 g at 50 A/m(2). Moreover, the operational parameters (current density, MNP load, initial pH, and airflow rate) were optimized. After that, adsorption isotherm was also conducted to compare the absorption quantity of CB and carbon nanotube (CNT). Then, the surface morphologies of MNPs were characterized by transmission electron microscope (TEM), energy-dispersive X-ray detector (EDX), and Fourier transform infrared spectroscopy (FTIR); and the modified cathode was characterized by SEM and contact angle. Finally, the stability and reusability of modified cathode were tested. Result uncovered that the PTFE/MNP/CB-modified cathode has the potential for industrial application and the solution after treatment was easily biodegradable.

Keywords: Catalyst; Electro-Fenton process; Ferromagnetic nanoparticles; Graphite felt electrode; Rhodamine B.

MeSH terms

Adsorption
Catalysis
Electrochemical Techniques / methods*
Electrodes
Graphite / chemistry*
Hydrogen Peroxide / chemistry*
Hydrogen-Ion Concentration
Iron / chemistry*
Magnetite Nanoparticles / chemistry*
Oxidation-Reduction
Rhodamines / analysis*
Water Pollutants, Chemical / analysis*
Water Purification / methods*

Substances

Fenton's reagent
Magnetite Nanoparticles
Rhodamines
Water Pollutants, Chemical
Graphite
Hydrogen Peroxide
Iron
rhodamine B