Efficiency Evaluation of Adsorbents for the Removal of VOC and NO2 in an Underground Subway Station

Son, Youn-Suk; Kang, Young-Hoon; Chung, Soon-Ju; Park, Hyun Ju; Kim, Jo-Chun

doi:10.5572/ajae.2011.5.2.113

Cited by 20 publications

(12 citation statements)

References 14 publications

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“…The confined space occupied by the underground subway system can promote the concentration of pollutants entering from the outside atmosphere in addition to those generated within the system. Therefore, it is expected that the subway system in the Seoul metropolitan area contains different species of hazardous pollutants due to old ventilation and accessory systems (Son et al, 2011;Kim et al, 2008). This expectation was confirmed in previous studies conducted at the Seoul subway stations.…”

Section: Introductionsupporting

confidence: 73%

The Effect of Platform Screen Doors on PM10 Levels in a Subway Station and a Trial to Reduce PM10 in Tunnels

Son¹,

Salama

Jeong

et al. 2013

Asian J. Atmos. Environ

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PM 10 concentrations were measured at four monitoring sites at the Daechaung station of the Seoul subway. The four locations included two tunnels, a platform, and a waiting room. The outside site of the subway was also monitored for comparison purposes. In addition, the effect of the platform screen doors (PSDs) recently installed to isolate the PM 10 in a platform from a tunnel were evaluated, and a comparison between PM 10 levels during rush and non-rush hours was performed. It was observed that PM 10 levels in the tunnels were generally higher than those in the other locations. This might be associated with the generation of PM 10 within the tunnel due to the train braking and wear of the subway lines with the motion of the trains, which promotes the mixing and suspension of particulate matter. During this tunnel study, it was observed that the particle size of PM 10 ranged from 1.8 to 5.6 μm. It was revealed that the PM 10 levels in the tunnels were significantly increased by the PSDs, while those in the platform and waiting room decreased. As a result, in order to estimate the effect of ventilation system on PM 10 levels in the tunnels, fans with inverters were operated. It was found that the concentration of PM 10 was below 150 μg/m 3 when the air flow rate into a tunnel was approximately 210,000-216,000 CMH.

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Section: Introductionsupporting

confidence: 73%

The Effect of Platform Screen Doors on PM10 Levels in a Subway Station and a Trial to Reduce PM10 in Tunnels

Son¹,

Salama

Jeong

et al. 2013

Asian J. Atmos. Environ

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“…The underground spaces of a subway system (shopping mall, station office, and platform) are also the confined place that may promote the concentration of pollutants both from the outside atmosphere and generated internally. Moreover, gas-phase pollutants such as volatile organic compounds (VOCs) and nitrogen dioxide (NO 2 ) emitted from automobile can flow into subway station through ventilating openings or stairs (Son et al, 2011). Therefore, especially for the workers who spend their whole shift below ground, the air quality of the underground spaces of a subway has long been a concern.…”

Section: Introductionmentioning

confidence: 99%

Physicochemical Properties of Indoor Particulate Matter Collected on Subway Platforms in Japan

Jin¹,

Matuyama²,

Sera³

et al. 2012

Asian J. Atmos. Environ

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This study was aimed to thoroughly estimate the characteristics of indoor particulate matter (PM) collected on subway platforms by the cooperative approach of semi-bulk and single particle analyses. The size-resolved PM and its number concentration were measured on the platform in a heavily traveled subway station in Fukuoka, Japan. Particle Induced Xray Emission (PIXE) and micro-PIXE techniques were applied to the chemical analyses of semi-bulk and single particle, respectively. There was the close resemblance of timely fluctuation between PM number concentration and train service on the third basement floor (B3F) platform compared to the second basement floor (B2F) and its maximum level was marked in rush hour. Higher number counts in large particles (¤1 μm) and lower number counts in fine particles (⁄1 μm) were shown on the platform compared to an above ground. PM2.5 accounted for 58.2% and 38.2 % of TSP on B3F and on B2F, respectively. The elements that were ranked at high concentration in sizeresolved semi-bulk PM were Fe, Si, Ca, S, and Na. The major elements tending to have more elevated levels on B3F than B2F were Fe (4.4 times), Ca (17.3 times), and Si (46.4 times). Although concentrations were very low, Cr (11.9 ng m -3 on B3F, 2.4 ng m -3 on B2F), Mn (3.4 ng m -3 on B3F, 0.9 ng m -3 on B2F), and Pb (0.6 ng m -3 on B3F, 1.6 ng m -3 on B2F) were detected from PM2.5. Individual PM was nearly all enriched in Fe with Si and Ca. Classifying and source profiling of the individual particles by elemental maps and particle morphology were tried and particles were presumably divided into four groups (i.e., train/rail friction, train-rail sparking, ballast/abrasive, and cement).

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“…The heat in this process expands the porosity and increases the specific surface area (Son et al 2011). Activated carbon is one of the most common sorbents in commercial use (Harper 2000), since it adsorbs most nonpolar and slightly polar VOCs.…”

Section: Activated Carbon As An Adsorbent For Materials Testingmentioning

confidence: 99%

“…Activated carbon is one of the most common sorbents in commercial use (Harper 2000), since it adsorbs most nonpolar and slightly polar VOCs. Because of its high adsorption capability, activated carbon is used to collect NO 2 and other VOCs in low-concentration open space pollution environments (Son et al 2011). In order to develop a system to easily detect VOCS in an Oddy test setup by museum professionals worldwide, we chose to test activated carbon, since it is widely available and capable of adsorbing a relatively wide range of VOCs.…”

Section: Activated Carbon As An Adsorbent For Materials Testingmentioning

confidence: 99%

Oddy Tests: Adding the Analytical Dimension

Beiner

Lavi

Seri³

et al. 2015

Collection Forum

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Abstract.-The so-called "Oddy test" has gained popularity in art and archaeology collections because it is inexpensive to use, and the results are relatively easy to analyze. However, the method is also subjective and does not identify the pollutants. Here we present a modification to the traditional test that addresses these drawbacks and aims at providing solutions. Activated carbon was used to adsorb the volatile emissions generated within the standard Oddy test setup. Gas chromatographymass spectrometry (GC-MS) analysis of the volatile organic compounds (VOCs) desorbed from the activated carbon detected pollutants within a considerably shorter time frame than the traditional Oddy test and provided both qualitative and quantitative data. GC-MS analysis of volatiles offgassed during the Oddy test provided information about the VOCs from local brands of materials commonly used for conservation and storage of objects in collections. The use of GC-MS analysis of volatiles improves the Oddy test in a fast, sensitive, and quantitative manner.

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Efficiency Evaluation of Adsorbents for the Removal of VOC and NO2 in an Underground Subway Station

Cited by 20 publications

References 14 publications

The Effect of Platform Screen Doors on PM10 Levels in a Subway Station and a Trial to Reduce PM10 in Tunnels

The Effect of Platform Screen Doors on PM10 Levels in a Subway Station and a Trial to Reduce PM10 in Tunnels

Physicochemical Properties of Indoor Particulate Matter Collected on Subway Platforms in Japan

Oddy Tests: Adding the Analytical Dimension

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