Environmental Science and Pollution Research

, Volume 26, Issue 4, pp 3145–3156 | Cite as

Heterogeneous electro-Fenton catalyst for 1-butylpyridinium chloride degradation

  • Jessica Meijide
  • Marta Pazos
  • Maria Ángeles SanrománEmail author
Contaminated sites, waste management and green chemistry: New challenges from monitoring to remediation


The application of the electro-Fenton process for organic compound mineralisation has been widely reported over the past years. However, operational problems related to the use of soluble iron salt as a homogeneous catalyst involve the development of novel catalysts that are able to operate in a wide pH range. For this purpose, polyvinyl alcohol-alginate beads, containing goethite as iron, were synthesised and evaluated as heterogeneous electro-Fenton catalyst for 1-butylpyridinium chloride mineralisation. The influence of catalyst dosage and pH solution on ionic liquid degradation was analysed, achieving almost total oxidation after 60 min under optimal conditions (2 g/L catalyst concentration and pH 3). The results showed good catalyst stability and reusability, although its effectiveness decreases slightly after three successive cycles. Furthermore, a plausible mineralisation pathway was proposed based on the oxidation byproducts determined by chromatographic techniques. Finally, the Microtox® test revealed notable detoxification after treatment which demonstrates high catalyst ability for pyridinium-based ionic liquid degradation by the electro-Fenton process.


Electro-Fenton Heterogeneous catalyst Pyridinium-based ionic liquid Toxicity 


Funding information

This research has been funded by the Spanish Ministry of Economy and Competitiveness MINECO and ERDF Funds (Projects CTM2014-52471-R).


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Copyright information

© Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  • Jessica Meijide
    • 1
  • Marta Pazos
    • 1
  • Maria Ángeles Sanromán
    • 1
    Email author
  1. 1.Department of Chemical EngineeringUniversity of VigoVigoSpain

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