• Title/Summary/Keyword: passive sampler

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Evaluation of Passive Sampler as a Useful Tool for Environmental Education (환경교육의 도구로서 간이 측정기의 활용에 관한 연구)

  • 전의찬;송민종
    • Hwankyungkyoyuk
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    • v.11 no.2
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    • pp.252-261
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    • 1998
  • Since 1980's during which environmental pollution became serious enough to urge various types of environmental educations in many areas. But, most emphasis has been put on theoretical education. Even field education training mostly focused on water pollution. Therefore, simple air pollution monitoring system was needed for better field education in air pollution. In this study, we evaluated Passive Sampler as an useful tool for teaching air pollution in field. Students have found passive sampler very effective tool. Recent comparative study of auto-monitoring and passive sampler networks suggested a potential use of passive sampler as an useful tool for environmental education. In this study, the correlation between two sets of values appears very high judging from the regression slope of 0.92 and correlation coefficient of 0.91 However, inexpensive Passive sampler with easy-to-operate colorimeter, has not been used in environmental education partially because large scale fluctuation in time and space characteristic to air pollution has been overlooked so that the sampler has not been tested for an effective educational tool. Passive sampler certainly deserves further in depth research as an effective air monitoring system, and better attention to its usefulness to teach students and public.

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A Study on the Performance of a Short Term Ozone Passive Sampler in Experimental Chamber (단기 측정용 오존 간이 측정기의 실험 챔버 내에서 성능에 관한 연구)

  • Jeong, Sang-Jin
    • Journal of Environmental Science International
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    • v.16 no.8
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    • pp.1001-1009
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    • 2007
  • Passive sampler is a simple and cost-effective measuring equipment for ambient and indoor air pollution. We studied the performance of a short term (1 hour mean concentration) ozone passive sampler which was coated with a colorant (indigo carmine) to a filter substrate. Acetone and sulfamic acid added ozone passive sampler was investigated to measure short term mean ozone concentration. Ozone response and interference of criteria air pollutant($SO_2,\;NO_2$, CO) on a short term ozone passive sampler was tested through experimental chamber. The results show sulfamic acid added passive ozone sampler have good response in ozone exposure. Interference of $NO_2$ gas is larger than other two criteria gases.

A Study on Ozone Passive Sampler (II) -Interference and Field Application (오존간이 측정기에 대한 연구(II)-간섭현상 및 현장 적용성)

  • Jeong, Sang-Jin;Yang, Hee-Jun
    • Journal of Korean Society for Atmospheric Environment
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    • v.22 no.6
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    • pp.904-911
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    • 2006
  • Passive sampler is simple and inexpensive measuring equipment for air pollution. In this study we developed colorimetric ozone passive sampler which was coated a colorimetric reagent to a filter substrate. Interference of criteria all pollutant ($SO_2,\;NO_2,\;CO$) on ozone passive sampler was investigated through experimental chamber. Field measurement of developed ozone passive samper was compared automatic sampler result in Suwon area. The results shows interference of $SO_2$ gas is larger than other gases. Developed passive sampler can be roughly applicable to wind speed range from 0.8 to 3.3 m/s, temperature range from 3.9 to $27.5^{\circ}C$ and relative humidity range from 48 to 84%.

Development of a Passive Sampler using 4-amino-3-hydrazino-5-mercapto-1, 2, 4-triazole for Measuring Indoor Formaldehyde (4-Amino-3-hydrazino-5-mercapto-1, 2, 4-triazole을 이용한 실내 포름알데히드 측정용 passive sampler 개발)

  • Kim Sun-Tae;Yim Bongbeen;Jeong Jaeho
    • Journal of Korean Society for Atmospheric Environment
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    • v.21 no.6
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    • pp.593-603
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    • 2005
  • Passive sampler using 4-amino-3-hydrazino-5-mercapto-1, 2, 4-triazole (AHMT) was developed to determine formaldehyde in indoor environment. The chromatography paper cleaned by $3\%$ hydrogen peroxide solution was experimently determined as a optimum absorbtion filter for the collection of formaldehyde. The passive sampler with a broad cross-sectional area and a short diffusion length was quite good in sensitivity. The passive sampler and the active sampling method with an impinger were strongly correlated with a correlation coefficient of 0.9848. The limits of detection and quantification of the passive sampler for the measurement of formaldehyde in the indoor environment were 7.5 and 10.2 ppb, respectively. Temperature ($19\∼28^{circ}C$) and relative humidity ($30\∼90\%$) had slight influence on the sampling rate of the passive sampler. However, the increase of flow velocity on the surface of sampler resulted in the increase of sampling rate.

Comparison of Active and Passive Sampler for Determining Temperal and Spatial Concentration Assessment of the Main Volatile Organic Compounds Concentration in Shihwa Industrial Complex (시화산업단지에서 주요 휘발성유기물질의 시간적, 공간적 농도 파악을 위한 능동식과 수동식 시료채취기 비교)

  • Byeon, Sang-Hoon;Choi, Hyeon-Il;Moon, Hyung-Il;Lee, Jung-Geun;Kim, Jung-Keun
    • Journal of Korean Society of Environmental Engineers
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    • v.33 no.11
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    • pp.790-796
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    • 2011
  • In this study, we measured the concentrations of volatile organic compounds (VOCs) in Shiwha area by using active and passive sampler. We did a comparative analysis of the characteristics of the active sampler and passive sampler. In the case of the passive sampler, the average TVOC concentration of the industrial area was 1.86 times higher than that of the residential area. In the case of the active sampler, the average TVOC concentration of the industrial area was 1.07 times higher than that of the residential area. When using the passive sampler, the concentration of VOCs in the industrial area was noted to be higher than the concentration found in the residential area. However, when we used the thermal desorption tube, the concentration of residential area was higher rather than that of industrial area in some substances such as trichloroethylene, toluene, ethylbenzene, and xylene. Toluene was a larger percentage of the overall BTEX ratio. In case of the passive sampler, the relative ratio of toluene, ethylbenzene, and xylene was higher in the industrial area than in the residential area. In contrast in case of the thermal desorption tube, the ratio of these substances was higher in the residential area rather than in the industrial area. The passive sampling in this study showed an appropriate method to analyze the temporal and spatial concentrations of air contaminants. This assessment would prove to be useful for its observance of standards or epidemical study.

Evaluation of an Ammonia Passive Sampler Using Chamber System

  • Yim, Bong-Been;Kim, Sun-Tae
    • Journal of Korean Society for Atmospheric Environment
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    • v.22 no.E1
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    • pp.1-8
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    • 2006
  • The purpose of this study was to evaluate the efficiency of a passive sampler in measuring atmospheric ammonia concentrations using chamber system. The ability of the passive sampler to quantitatively determine atmospheric ammonia gas was almost identical to that of the reference method (indophenol method). There was no significant difference between concentrations measured by the two methods. The detection and quantification limits of the ammonia passive sampler were 16.9 ppb and 25.3 ppb, respectively, for a 24-h sampling period. The average coefficient of variation between replicated samplers was $6.7{\pm}4.2%$. The concentrations measured by the two methods (passive sampler and indophenol method) were no significant difference with good a correlation (correlation coefficient=0.964).

Air Quality Evaluation with Passive Samplers for Large Cities (Passive Sampler를 이용한 대도시의 대기질 평가)

  • Jeon, Eui-Chan;Kim, Shin-Do;Choi, Kum-Chan
    • Journal of Environmental Impact Assessment
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    • v.7 no.2
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    • pp.83-88
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    • 1998
  • Filter badge type sampler has not been widely used to evaluate air quality over large cities in Korea while it can be successfully used for multi-point sampling and analysis. We evaluated the passive sampler as a new tool to monitor air quality over large cities. We latticed Metropolitan Seoul into $2{\times}2Km$ to give 136 points. $NO_2$ concentrations were measured at all the points in the Spring and Summer of 1997. According to the passive sampler data, natural green zones generally recorded lower $NO_2$ concentrations than major streets and traffic congestion areas. Passive samplers with abundant 136 points gave more detailed picture of $NO_2$ distribution while auto-monitoring network did not clearly provide the characteristics of local land use. Also, passive samplers gave 15% higher values than auto-monitoring network. The correlation between the two values appears very high judging from the regression slope of 0.92 and correlation coefficient of 0.91. This study clearly demonstrates the effectiveness of the passive sampler as a tool to monitor air quality over large cities.

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The measurement of NH$_3$ spatial distribution around the landfill site using the passive sampler (Passive sampler를 활용한 매립지 내ㆍ외부의 암모니아 공간분포 측정)

  • 이범진;김학민;김선태;정의석
    • Proceedings of the Korea Air Pollution Research Association Conference
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    • 2001.11a
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    • pp.319-320
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    • 2001
  • Passive sampler는 현장에서 제약 없이 사용할 수 있다는 간편성과 그 측정결과의 정확성, 정밀성에 대하여 입증된 바 있는 측정도구로써 대기질 측정 및 모니터링뿐만 아니라 최근에는 대기확산모델의 검증자료로도 활용되고 있다(김선태, 2001). 이러한 측정방법은 국내의 경우 1992년 이후 한정적으로 사용되었으나, 최근에는 국내뿐 아니라 해외에서도 passive sampler를 사용하는 사례가 증가하고 있으며, UNEP에서도 다양한 목적으로의 활용성을 언급하고 있다(UNEP, 1994). (중략)

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Development of a Passive Sampler using a Fluorescence Material for the Ambient Ozone (형광물질을 이용한 대기 중 오존 Passive Sampler의 개발)

  • 임봉빈;정의석;김선태
    • Journal of Korean Society for Atmospheric Environment
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    • v.20 no.4
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    • pp.483-491
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    • 2004
  • The purpose of this study is to develop an ozone passive sampler and to evaluate its performance p-Acetamidophenol using as the reagent for ozone reacts specifically with the ambient ozone to produce a fluorescence material (p-acetamidopheonl dimer). The volume of absorbent solution and the extraction time determined at suitable conditions for measuring ozone were 100$\mu$L and 60 min, respectively. The changes of fluorescence were observed with incresing the storage period of passive samplers in ambient air. but the cool storage in a refrigerator did not remarkably influence the increase of fluorescence. The measurement for the precision oi the passive sampling was carried out with duplicate measurement of passive samplers. The intra-class correlation coefficients of passive samplers using dry and wet filters were 0.992 and 0.962, respectively The results from field validation tests indicated practical agreement (dry filter: r=0.963, wet filter: r=0.995) between the passive sampler and an UV photometric $O_3$ analyzer. The limit of quantification of ozone passive samplers with sampling time of 8 hr (wet filter) and 24 hr (dry filter) were 8.0 ppb and 2.7 ppb, respectively.

Application of Passive Sampling in Marine Environment: 2. Modified Method for Shortening of Deployment Time in a Field (해양환경에서의 수동형채집기(Passive Sampler)의 활용: 2. 현장노출시간 단축을 위한 개선법)

  • JANG, YU LEE;LEE, HYO JIN;JEONG, HAE JIN;KIM, GI BEUM
    • The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY
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    • v.24 no.2
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    • pp.249-265
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    • 2019
  • A passive sampler is one of the promising methods to easily and more accurately predict the free dissolved and bioavailable concentration ($C_{free}$) in seawater or pore water in sediments. In Europe and the United States, the use of passive samplers has been highly encouraged for more accurate marine environmental risk assessment. However, long deployment time in the field causes problems such as biofouling of the samplers, so there are few studies using passive samplers in Korea. Therefore, we review the principle and basic characteristics of the passive sampler for persistent organic pollutants, and introduce various improvement cases for the field applications of the passive sampler.