Study of the intensification of solar photo-Fenton degradation of carbamazepine with ferrioxalate complexes and ultrasound

A. J. Expósito, J. M. Monteagudo, A. Durán, I. San Martín, L. González

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

The intensification of the solar photo-Fenton system with ferrioxalate photoactive complexes and ultrasound applied to the mineralization of 15 mg/L carbamazepine aqueous solution (CBZ) was evaluated. The experiments were carried out in a solar compound parabolic collector (CPC) pilot plant reactor coupled to an ultrasonic processor. The dynamic behavior of hydroxyl radicals generated under the different studied reaction systems was discussed. The initial concentrations of hydrogen peroxide and ferrous/oxalic acid and pH were found to be the most significant variables (32.79%, 25.98% and 26.04%, respectively). Under the selected optimal conditions ([H2O2]0 = 150 mg/L; [Fe2+]0 = 2.5 mg/L/[(COOH)2]0 = 12.1 mg/L; pH = 5) CBZ was fully degraded after 5 min and 80% of TOC was removed using a solar photo-Fenton system intensified with ferrioxalate (SPFF). However, no improvement in the mineralization using SPFF process combined with ultrasound was observed. More mild pH conditions could be used in the SPFF system if compared to the traditional photo-Fenton (pH 3) acidic systems. Finally, a possible reaction pathway for the mineralization of CBZ by the SPFF system was proposed and therein discussed.

Original languageEnglish
Pages (from-to)597-605
Number of pages9
JournalJournal of Hazardous Materials
Volume342
Early online date30 Aug 2017
DOIs
Publication statusPublished - 15 Jan 2018

Keywords

  • Carbamazepine
  • Ferrioxalate
  • Hydroxyl radical behavior
  • Solar photo-Fenton
  • Ultrasound

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

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