Fenton based advanced oxidation process is a promising technology for the complete mineralization of persistent organic pollutants over the traditional physicochemical and biological treatment processes. Application of nanomaterials in the recent advancement of Fenton based water and wastewater treatment processes are reviewed in this study. Usage of active and stable nanocatalyst such as metal oxides, graphene/graphene oxide/carbon nanotubes supported metal oxide, clay based nanocomposites in Fenton, photo-Fenton, electro-Fenton and photoelectro-Fenton processes are discussed in detail. This review also highlights the application of nanocomposite based electrodes in electrochemical oxidation process for treating the bio-refractory compounds. Copyright &copy; 2016 American Scientific Publishers.

Indumathi Manivannan Nambi

Department Of Civil Engineering

Govindaraj Divyapriya

Jaganathan Senthilnathan

Electrochemical oxidation

Metals

Nanocomposites

Organic pollutants

Oxidation resistance

Wastewater treatment

Water treatment

Yarn

Advanced oxidation processes

Biological treatment process

FENTON

Nano-catalyst

PERSISTENT ORGANIC POLLUTANT (POP)

PHOTOELECTRO-FENTON PROCESS

REFRACTORY COMPOUNDS

Water and wastewater treatments

oxidation

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

Journal of Bionanoscience

In this study, ferrocene functionalized electrochemically reduced graphene oxide (Fc-ErGO) was used as electro-Fenton catalyst in rotating disc electrode system for the continuous generation of reactive oxygen species without external aeration. The nature of Fc-ErGO was evaluated using X-ray photoelectron spectroscopy, Raman spectroscopy, scanning electron microscopy and energy-dispersive X-ray spectroscopy analysis. Degradation of ciprofloxacin and carbamazepine were carried out to evaluate the performance of reactor. Enhanced removal rate was achieved at a wider range of pH as compared to the unmodified and ErGO modified graphite felt electrode systems. An increase in rotational speed of the disc electrodes resulted in enhanced removal rate due to improved mass transfer activity. At neutral condition, the removal rate was found to be 0.199 min−1 and 0.082 min−1 for ciprofloxacin and carbamazepine, respectively. Quantification of reactive oxygen species was also done. The Fc-ErGO modified cathode showed 644 μM, 264 μM, and 163 μM of •OH radicals at pH 3.0, 7.0 and 9.0 respectively; it confirms that ferrocene efficiently catalyses the conversion of H2O2 to •OH radicals and facilitates the degradation of contaminants. Stable catalytic activity was achieved even upto 10 cycles of repeatable experimental runs. A highly efficient, cleaner electro-Fenton system without external aeration and chemical addition was successfully demonstrated. © 2018 Elsevier Ltd

Electrochimica Acta

Highly active and stable ferrocene functionalized graphene encapsulated carbon felt array - A novel rotating disc electrode for electro-Fenton oxidation of pharmaceutical compounds

Ferrocene functionalized graphene based graphite felt electrode was firstly investigated for heterogeneous electro−Fenton oxidation of ciprofloxacin in neutral pH condition. Electrochemical reduction of Ferrocene functionalized graphene oxide (Fc-ErGO) was performed by cyclic voltammetry technique. At neutral pH condition, Fc-ErGO electrode (0.035 min─1) exhibited ∼3 times and ∼9 times higher removal rates in comparison with plane ErGO (0.010 min─1) and plane graphite felt (0.004 min─1) electrodes respectively. The effect of pH and applied potential were studied for the degradation of ciprofloxacin in Fc-ErGO based electrode. Higher removal rate was observed at acidic pH (0.222 min─1), whereas alkaline pH showed lower removal efficiency (0.014 min─1). &gt; 99% removal of ciprofloxacin was achieved with in 15 min and 120 min of reactions period at pH 3.0 and pH 7.0, respectively. H2O2 generation was found to be high in plane ErGO electrode system in all of the pH conditions. Owing to the high redox ability of ferrocene, Fc-ErGO electrode generated high concentration of [rad]OH radicals (426 μM pH 3.0; 247 μM pH 7.0; 210 μM pH 9.0) than ErGO and plane graphite felt electrodes; The electrode reusability study was performed to understand the electrode stability. There was no significant change in removal efficiency even after the 5th cycle of reusability study at both acidic and neutral conditions. The possible mechanism of oxidation in Fc-ErGO based electro-Fenton process was also proposed based on the continuous monitoring of H2O2 and [rad]OH radicals generated in the system. © 2018

Chemosphere

Ferrocene functionalized graphene based electrode for the electro−Fenton oxidation of ciprofloxacin

Nanocatalysts in fenton based advanced oxidation process for water and wastewater treatment

Scientific Reports

Structural and functional investigation of graphene oxide–Fe3O4 nanocomposites for the heterogeneous Fenton-like reaction

Chemical Engineering Journal

High performance of nanoscaled Fe2O3 catalyzing UV-Fenton under neutral condition with a low stoichiometry of H2O2: Kinetic study and mechanism

Journal of Colloid and Interface Science

Easy solid-phase synthesis of pH-insensitive heterogeneous CNTs/FeS Fenton-like catalyst for the removal of antibiotics from aqueous solution

Water Research

Heterogeneous electro-Fenton using modified iron–carbon as catalyst for 2,4-dichlorophenol degradation: Influence factors, mechanism and degradation pathway

Journal	Data powered by TypesetJournal of Bionanoscience
Publisher	Data powered by TypesetAmerican Scientific Publishers
ISSN	15577910
Open Access	No