, Volume 9, Issue 6, pp 716–724 | Cite as

Electro-Fenton Degradation of Trimellitic and Pyromellitic Acids: Kinetics and Mechanism

  • Asma SennaouiEmail author
  • Said Alahiane
  • Fatima Sakr
  • Brahim El Ibrahimi
  • Souad El Issami
  • El Habib Ait Addi
  • Ali Assabbane
Original Research


This paper describes the application of electro-Fenton technology to decontaminate waters containing trimellitic and pyromellitic acids. In this technique, the electrogeneration of hydroxyl radicals (OH) leads to the oxidative degradation of the benzene polycarboxylic acids until their total mineralization. The effect of the operating parameters on the trimellitic acid removal was studied. Under the optimal conditions (C0 = 2.10−4 M, [Fe2+] = 0.3 mM, I = 300 mA, [Na2SO4] = 0.05 M, pH = 3), the mineralization of pyromellitic and trimellitic acid solutions was followed by chemical organic demand (COD) measurements after 4 and 5 h of electrolysis time, respectively. The highest disappearance rate of the pyromellitic acid is due to its greater reactivity compared to the trimellitic acid towards the hydroxyl radicals. The products resulting from degradation of pyromellitic acid were identified by using UPLC/MS. The identified by-products allowed proposing a degradation pathway for the pyromellitic and trimellic acids.

Graphical Abstract


Degradation pathway Electro-Fenton Mineralization Pyromellitic acid Trimellitic acid 


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Asma Sennaoui
    • 1
    Email author
  • Said Alahiane
    • 1
  • Fatima Sakr
    • 1
  • Brahim El Ibrahimi
    • 2
  • Souad El Issami
    • 2
  • El Habib Ait Addi
    • 3
  • Ali Assabbane
    • 1
  1. 1.Laboratory of Electrochemistry Catalysis and Environment, Catalysis and Environment Team, Faculty of ScienceIbn Zohr UniversityAgadirMorocco
  2. 2.Apply Chemistry-Physic Team, Faculty of ScienceIbn Zohr UniversityAgadirMorocco
  3. 3.Biotechnology Energy and Environment Team, Superior School of TechnologyIbn Zohr UniversityAgadirMorocco

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