Real-Time Gas-Phase Analysis of Mono- to Tri-Chlorobenzenes Generated from Heated MSWI Fly Ashes Containing Various Metal Compounds: Application of VUVSPI-IT-TOFMS

We measured sensitive real-time change of low-chlorinated (Cl...-Cl...) benzenes in gas phase from heated model and real solid samples using the recently developed vacuum ultraviolet (VUV) single-photon ionization (SPI) ion trap time-of-flight mass spectrometer (VUV-SPI-IT-TOFMS). Model solid sample...

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Bibliographic Details
Published inEnvironmental science & technology Vol. 44; no. 14; p. 5528
Main Authors Fujimori, Takashi, Takaoka, Masaki, Tsuruga, Shigenori, Oshita, Kazuyuki, Takeda, Nobuo
Format Journal Article
LanguageEnglish
Published Easton American Chemical Society 15.07.2010
Subjects
Chlorine
Fly ash
Hydrocarbons
Incinerators
Mass spectrometry
Measurement techniques
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Summary:We measured sensitive real-time change of low-chlorinated (Cl...-Cl...) benzenes in gas phase from heated model and real solid samples using the recently developed vacuum ultraviolet (VUV) single-photon ionization (SPI) ion trap time-of-flight mass spectrometer (VUV-SPI-IT-TOFMS). Model solid samples that contained activated carbon, potassium chloride, silicon dioxide, and trace metallic compounds (copper, iron, lead, and zinc) were used to simulate fly ash at a municipal solid waste incinerator (MSWI). The concentrations of chlorobenzenes determined by integrating the area for 30 min using VUV-SPI-IT-TOFMS were correlated with gas-phase concentrations analyzed by GC/MS. Real-time changes had characteristic patterns dependent on metal species and compounds. Comparing gas-phase real-time patterns of low-chlorinated benzenes between real and model fly ashes, copper chloride- and oxide-like compounds in real fly ash at the postcombustion zone in a MSWI may play key factors in the formation of low-chlorinated benzenes. Lead and zinc compounds and iron oxide in solid phase did not affect the formation of low-chlorinated benzenes in gas phase. VUV-SPI-IT-TOFMS can be applied to the time-dependent characterization of volatile low-chlorinated benzenes in gas phase in various artificial and environmental processes. (ProQuest: ... denotes formulae/symbols omitted.)
ISSN:0013-936X