Environmental Science and Pollution Research

, Volume 25, Issue 35, pp 34811–34817 | Cite as

Kinetics of imidazolium-based ionic liquids degradation in aqueous solution by Fenton oxidation

  • Carmen M. DomínguezEmail author
  • Macarena MunozEmail author
  • Asunción Quintanilla
  • Zahara M. de Pedro
  • Jose A. Casas
Advanced oxidation processes for water/wastewater treatment


In the last few years, several works dealing with Fenton oxidation of ionic liquids (ILs) have proved the capability of this technology for their degradation, achieving complete ILs removal and non-toxic effluents. Nevertheless, very little is known about the kinetics of this process, crucial for its potential application. In this work, the effect of several operating conditions, including reaction temperature (50–90 °C), catalyst load (10–50 mg L−1 Fe3+), initial IL concentration (100–2000 mg L−1), and hydrogen peroxide dose (10–200% of the stoichiometric amount for the complete IL mineralization) on 1-butyl-3-methylimidazolium chloride ([C4mim]Cl) oxidation has been investigated. Under the optimum operating conditions (T = 90 °C; [Fe3+]0 = 50 mg L−1; [H2O2]0 = 100% of the stoichiometric amount), the complete removal of [C4mim]Cl (1000 mg L−1) was achieved at 1.5-min reaction time. From the experimental results, a potential kinetic model capable to describe the removal of imidazolium-based ILs by Fenton oxidation has been developed. By fitting the proposed model to the experimental data, the orders of the reaction with respect to IL initial concentration, Fe3+ amount and H2O2 dose were found to be close to 1, with an apparent activation energy of 43.3 kJ mol−1. The model resulted in a reasonable fit within the wide range of operating conditions tested in this work.


Fenton Ionic liquid Imidazolium, kinetic model 



This research has been supported by the Spanish MINECO through the project CTQ2013-4196-R and by the CM through the project S2013/MAE-2716. C.M. Domínguez and M. Munoz thank the Spanish MINECO for their Juan de la Cierva-Formación (FJCI-2014-20732) and Juan de la Cierva-Incorporación (IJCI-2014-19427) postdoctoral contracts, respectively.

Supplementary material

11356_2017_459_MOESM1_ESM.docx (44 kb)
ESM 1 (DOCX 43 kb)


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Copyright information

© Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  1. 1.Chemical Engineering DepartmentUniversidad Complutense de MadridMadridSpain
  2. 2.Chemical Engineering SectionUniversidad Autónoma de MadridMadridSpain

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