An efficient tool for the continuous monitoring on adsorption of sub-ppm level gaseous benzene using an automated analytical system based on thermal desorption-gas chromatography/mass spectrometry approach

Chae Jin Na, Kumar Vikrant, Ki Hyun Kim, Youn Suk Son

Research output: Contribution to journalArticle

Abstract

It became an important task to effectively adsorb volatile organic compounds (VOCs) at or near real-world levels for efficient control of airborne pollution in ambient environments. Nonetheless, most studies carried out previously for the control of VOCs are confined to significantly polluted conditions (e.g., >100 ppm) that are far different from real-world or ambient conditions. To help acquire the meaningful data for the adsorptive removal of VOCs at near real-world levels, a new approach was designed and implemented to measure adsorption of gaseous benzene (as a representative or model VOC) at trace-level quantities (as low as 0.14 ng (0.43 ppb) for a 100 mL sample) using activated carbon (sieved to 212 μm mesh size) as a model sorbent. With the aid of a thermal desorption-gas chromatography/mass spectrometry system, the key adsorption performance metrics (such as 10% breakthrough volume (10% BTV) points: 10% as the key reference) were determined: 1018 L atm g−1 at 0.1 ppm benzene with the corresponding partition coefficient of 3.85 mol kg−1 Pa−1. If the adsorption capacity values (at 10% BTV) are compared across the varying concentration levels of benzene, the maximum value of 1.07 mg g−1 was observed at 1 ppm benzene (within the concentration range selected in this work). As such, it was possible to quantitatively assess the sorbate-sorbent interactions at significantly low concentrations of VOCs that actually prevail under the near real-world conditions.

Original languageEnglish
Article number109024
JournalEnvironmental research
Volume182
DOIs
StatePublished - 2020 Mar

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Volatile Organic Compounds
Thermal desorption
Benzene
Gas chromatography
Gas Chromatography-Mass Spectrometry
Adsorption
benzene
volatile organic compound
Mass spectrometry
desorption
gas chromatography
mass spectrometry
Hot Temperature
adsorption
Monitoring
monitoring
Sorbents
mesh size
partition coefficient
Activated carbon

Keywords

  • Adsorption
  • Analytical chemistry
  • Benzene
  • Pollution control
  • TD-GC/MS
  • VOCs

Cite this

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title = "An efficient tool for the continuous monitoring on adsorption of sub-ppm level gaseous benzene using an automated analytical system based on thermal desorption-gas chromatography/mass spectrometry approach",
abstract = "It became an important task to effectively adsorb volatile organic compounds (VOCs) at or near real-world levels for efficient control of airborne pollution in ambient environments. Nonetheless, most studies carried out previously for the control of VOCs are confined to significantly polluted conditions (e.g., >100 ppm) that are far different from real-world or ambient conditions. To help acquire the meaningful data for the adsorptive removal of VOCs at near real-world levels, a new approach was designed and implemented to measure adsorption of gaseous benzene (as a representative or model VOC) at trace-level quantities (as low as 0.14 ng (0.43 ppb) for a 100 mL sample) using activated carbon (sieved to 212 μm mesh size) as a model sorbent. With the aid of a thermal desorption-gas chromatography/mass spectrometry system, the key adsorption performance metrics (such as 10{\%} breakthrough volume (10{\%} BTV) points: 10{\%} as the key reference) were determined: 1018 L atm g−1 at 0.1 ppm benzene with the corresponding partition coefficient of 3.85 mol kg−1 Pa−1. If the adsorption capacity values (at 10{\%} BTV) are compared across the varying concentration levels of benzene, the maximum value of 1.07 mg g−1 was observed at 1 ppm benzene (within the concentration range selected in this work). As such, it was possible to quantitatively assess the sorbate-sorbent interactions at significantly low concentrations of VOCs that actually prevail under the near real-world conditions.",
keywords = "Adsorption, Analytical chemistry, Benzene, Pollution control, TD-GC/MS, VOCs",
author = "Na, {Chae Jin} and Kumar Vikrant and Kim, {Ki Hyun} and Son, {Youn Suk}",
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AU - Na, Chae Jin

AU - Vikrant, Kumar

AU - Kim, Ki Hyun

AU - Son, Youn Suk

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KW - Analytical chemistry

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KW - Pollution control

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