| 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 |
| Author(s): | Na CJ; Vikrant K; Kim KH; Son YS; |
| Address: | "Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seoul, 04763, Republic of Korea. Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seoul, 04763, Republic of Korea. Electronic address: kkim61@hanyang.ac.kr. Department of Environmental Engineering, Pukyong National University, 45Yongso-ro, Busan, 48513, Republic of Korea. Electronic address: sonys@pknu.ac.kr" |
| DOI: | 10.1016/j.envres.2019.109024 |
| ISSN/ISBN: | 1096-0953 (Electronic) 0013-9351 (Linking) |
| 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 mum 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 *Benzene Gas Chromatography-Mass Spectrometry Gases *Volatile Organic Compounds Analytical chemistry Benzene Pollution control Td-gc/ms VOCs; |
| Notes: | "MedlineNa, Chae-Jin Vikrant, Kumar Kim, Ki-Hyun Son, Youn-Suk eng Research Support, Non-U.S. Gov't Netherlands 2019/12/22 Environ Res. 2020 Mar; 182:109024. doi: 10.1016/j.envres.2019.109024. Epub 2019 Dec 14" |
