Degradation of dyes in aqueous solutions by the Fenton process

Xiang Rong Xu, Hua Bin Li, Wen Hua Wang, Ji Dong Gu

Research output: Contribution to journalArticlepeer-review

145 Scopus citations

Abstract

Degradation of 20 different dyes in aqueous solutions by the Fenton process was performed. These dyes include 6 types: acidic, reactive, direct, cationic, disperse and vat dyes. The former four types of dyes were decolorized and their TOC values were decreased greatly, while the color and TOC removals of the latter two types were lower. The catalytic activities of four metal ions on the degradation efficiencies of Vat Blue BO, which was chosen as a model dye because of its lowest color and TOC removals, were compared in the dark and under the ultraviolet light irradiation. The catalytic ability of different metals was Fe 2+ > Cu 2+ > Mn 2+ > Ag + in the dark, and the same sequence was obtained under irradiation condition with greater degradation efficiency. Furthermore, the efficiencies of three oxidation processes, including H 2O 2/UV, Fe 2+/H 2O 2 and Fe 2+/H 2O 2/UV were compared. The results showed that the oxidation by Fe 2+/H 2O 2/UV was the strongest, and even greater than the arithmetic sum of the other two processes, which suggests the synergistic effect of ultraviolet and ferrous ions on the degradation reaction.

Original languageEnglish
Pages (from-to)595-600
Number of pages6
JournalChemosphere
Volume57
Issue number7
DOIs
StatePublished - Nov 2004
Externally publishedYes

Keywords

  • Hydrogen peroxide
  • Oxidation
  • Textile
  • Treatment
  • Wastewater

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