The photodegradation of trichloroethylene with or without the NAPL by UV irradiation in surfactant solutions

Juncai Jia, Wei Chu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

8 Citations (Scopus)

Abstract

The photodegradation of trichloroethene (TCE) with or without nonaqueous phase liquids (NAPL) by ultraviolet irradiation in surfactant solutions was examined in this study. The photodecay of TCE was studied at monochromatic 254 nm UV lamps. The effects of the type of surfactants, initial surfactant concentrations, pH levels and NAPL concentrations were examined to explore the photodecay of TCE. All the photodegradation of TCE followed pseudo-first-order decay kinetics at various conditions. It was found that Brij 35 overdose and higher initial pH levels may retard or inhibit the photodecay of TCE, mainly due to protons, intermediate generation and change of surfactant structure in the processes. The optimal condition for TCE photodecay was suggested based on the analysis of kinetics data, from which the reaction mechanism of TCE in the presence of NAPL form was also studied. In general, the reactions of TCE in micellar solution and NAPL pool can be considered as independent pathways due to the low molecule diffusion between the two phases.
Original languageEnglish
Pages (from-to)196-201
Number of pages6
JournalJournal of Hazardous Materials
Volume161
Issue number1
DOIs
Publication statusPublished - 15 Jan 2009

Keywords

  • Nonaqueous phase liquids (NAPL)
  • Photodegradation
  • Surfactant
  • Trichloroethene

ASJC Scopus subject areas

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

Cite this