Insight into CaO2-based Fenton and Fenton-like systems: Strategy for CaO2-based oxidation of organic contaminants

Yunfei Xue, Qian Sui, Mark L Brusseau, Wei Zhou, Zhaofu Qiu, Shuguang Lyu

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

This study conducted a comparison of the CaO2-based Fenton (CaO2/Fe(II)) and Fenton-like (CaO2/Fe(III)) systems on their benzene degradation performance. The H2O2, Fe(II), Fe(III), and HO[rad] variations were investigated during the benzene degradation. Although benzene has been totally removed in the two systems, the variation patterns of the investigated parameters were different, leading to different benzene degradation patterns. In terms of the Fe(II)/Fe(III) conversion, the CaO2/Fe(II) and CaO2/Fe(III) systems were actually inseparable and had the inherent mechanism relationships. For the CaO2/Fe(III) system, the initial Fe(III) must be converted to Fe(II), and then the consequent Fenton reaction could be later developed with the regenerated Fe(II). Moreover, some benzene degradation intermediates could have the ability to facilitate the transformation of the Fe(III) to Fe(II) without the classic H2O2-associated propagation reactions. By varying the Fe(II) dosing method, an effective degradation strategy has been developed to take advantage of the two CaO2-based oxidation systems. The proposed strategy was further successfully tested in TCE degradation, therefore extending the potential for the application of this technique.

Original languageEnglish (US)
Pages (from-to)919-928
Number of pages10
JournalChemical Engineering Journal
DOIs
Publication statusPublished - Apr 1 2019

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Keywords

  • Application strategy
  • Calcium peroxide
  • Fenton system
  • Fenton-like system
  • Hydroxyl radicals

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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