Purge and trap method to determine alpha factors of VOC liquid-phase mass transfer coefficients

Xinming Wang, Jiamo Fu, Guoying Sheng, Shuncheng Lee, L. Y. Chan, Yushun Min, Ping'an Peng, C. Y. Chan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

A theoretical approach and laboratory practice of determining the alpha factors of volatile organic compound (VOC) liquid-phase mass transfer coefficients are present in this study. Using Purge & Trap Concentrator, VOC spiked water samples are purged by high-purity nitrogen in the laboratory, the VOC liquid-phase mass transfer rate constants under the laboratory conditions are then obtained by observing the variation of VOCs purged out of the water with the purge time. The alpha factors of VOC liquid-phase mass transfer coefficients are calculated as the ratios of the liquid-phase mass transfer rate constants in real water samples to their counterparts in pure water under the same experimental conditions. This direct and fast approach is easy to control in the laboratory, and would benefit mutual comparison among researchers, so might be useful for the study of VOC mass transfer across the liquid-gas interface.
Original languageEnglish
Pages (from-to)76-79
Number of pages4
JournalChinese Science Bulletin
Volume45
Issue numberSUPPL.
Publication statusPublished - 1 Mar 2000

Keywords

  • Alpha factor
  • Mass transfer coefficient
  • Purge and trap
  • Volatile organic compounds

ASJC Scopus subject areas

  • General

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