• Title, Summary, Keyword: Airborne particulate matter

Search Result 80, Processing Time 0.055 seconds

Chemopreventive Effect of Quercetin, Vitamin C and Trolox Against the Organic Extract of Airborne Particulate Matter Induced Genotoxicity in A549 Human Lung Carcinoma Cells (대기부유분진추출물로 야기된 DNA 손상에 대한 Quercetin, Vitamin C 및 Trolox 의 보호효과)

  • Kim, Nam-Yee;Heo, Moon-Young
    • YAKHAK HOEJI
    • /
    • v.51 no.4
    • /
    • pp.239-245
    • /
    • 2007
  • In order to evaluate the genotoxicity of airborne particulate matter extracted with dichloromethane (APE), the rat microsome mediated (S-9) or DNA repair enzyme treated Comet assays were performed using the single cell gel electrophoresis in A549 human lung carcinoma cells. It was found that the cells interacting with APE showed more DNA single-strand breaks relative to untreated cells. The genotoxicity of APE was increased with the treatment of S-9 mixture. Microsome mediated DNA damage was inhibited by CYP1Al inhibitor, quercetin. The APE also showed oxidative DNA damage evaluated by endonuclease III treatment. Oxidative DNA damage of APE was inhibited by antioxidants such as vita- min C and Trolox. We also found that the vegetables or fruits extract may reduce APE-induced genotoxicity by their anti- oxidant activity and CYP1A1 inhibition.

Measurement of the Elemental Composition in Airborne Particulate Matter Using Instrumental Neutron Activation Analys

  • Chung, Yong-Sam;Lim, Jong-Myoung;Moon, Jong-Hwa;Kim, Sun-Ha;Cho, Hyun-Je;Kim, Young-Jin
    • Nuclear Engineering and Technology
    • /
    • v.36 no.5
    • /
    • pp.450-459
    • /
    • 2004
  • For the evaluation of emission sources by air sampling, airborne particulate matter for fine (<2.5 ${\mu}m2$ EAD : $PM_{2.5}$) and coarse partical (2.5-10 ${\mu}m2$ EAD : $PM_{2.5-10}$ fractions were collected using a Gent stacked filter unit low volume sampler and two types of polycarbonate filters. Air samples were collected twice monthly at two regions in and around Daejeon city in the Republic of Korea from January to December 2002. Monthly mass concentration of $PM_{2.5}$ and $PM_{2.5-10}$ were measured and the concentrations of 10 marker elements (Al, Sc, Ti ; Na, Cl ; As, V. Sb, Br, Se) were determined by an instrumental neutron activation analysis. Analytical quality control was corried out using certified reference materials. Enrichment factors were also calculated from the monitoring data to classify the anthropogenic and crustal origins.

Changes in Concentration Levels of Polycyclic Aromatic Compounds Associated with Airborne Particulate Matter in Downtown Tokyo after Introducing Government Diesel Vehicle Controls

  • Kojima, Yuki;Inazu, Koji;Hisamatsu, Yoshiharu;Okochi, Hiroshi;Baba, Toshihide;Nagoya, Toshio
    • Asian Journal of Atmospheric Environment
    • /
    • v.4 no.1
    • /
    • pp.1-8
    • /
    • 2010
  • The effectiveness of the government regulation on tail-pipe emission for diesel vehicles issued in 2003 in Tokyo was evaluated in this study. Variations in annual average concentrations of polycyclic aromatic hydrocarbons (PAHs) and nitro-PAHs associated with airborne particulate matter were investigated in connection with the variation in airborne elemental carbon (EC) concentration in downtown Tokyo, Japan in 2006-2007 and in 1997-1998. The annual average concentrations of EC, seven different PAHs, and 1-nitropyrene were found to have decreased significantly from 1997-1998 to 2006-2007. The most prominent decrease in atmospheric concentration was observed for 1-nitropyrene, which is a representative nitro-PAH originating from diesel vehicles. This indicated that the government control has worked to considerably reduce both atmospheric mutagens and airborne particulate matter. In contrast, the concentrations of two nitro-PAHs, 2-nitrofluoranthene and 2-nitropyrene, remained the same. These nitro-PAHs are known to be formed by atmospheric nitration of their parent PAHs, and this result suggested factors other than the concentration of parent PAHs and $NO_2$ affects the degree of atmospheric formation of nitro-PAHs.

Distribution of Airborne Fungi, Particulate Matter and Carbon Dioxide in Seoul Metropolitan Subway Stations (서울시 일부 지하철역 내 부유 진균, 입자상 물질, 이산화탄소의 분포 양상)

  • Kim, Ki-Youn;Park, Jae-Beom;Kim, Chi-Nyon;Lee, Kyung-Jong
    • Journal of Preventive Medicine and Public Health
    • /
    • v.39 no.4
    • /
    • pp.325-330
    • /
    • 2006
  • Objectives: The aims of this study were to examine the level of airborne fungi and environmental factors in Seoul metropolitan subway stations and to provide fundamental data to protect the health of subway workers and passengers. Methods: The field survey was performed from November in 2004 to February in 2005. A total 22 subway stations located at Seoul subway lines 1-4 were randomly selected. The measurement points were subway workers' activity areas (station office, bedroom, ticket office and driver's seat) and the passengers' activity areas (station precincts, inside train and platform). Air sampling for collecting airborne fungi was carried out using a one-stage cascade impactor. The PM and CO2 were measured using an electronic direct recorder and detecting tube, respectively. Results: In the activity areas of the subway workers and passengers, the mean concentrations of airborne fungi were relatively higher in the workers' bedroom and station precinct whereas the concentration of particulate matter, $PM_{10}\;and\;PM_{2.5}$, were relatively higher in the platform, inside the train and driver's seat than in the other activity areas. There was no significant difference in the concentration of airborne fungi between the underground and ground activity areas of the subway. The mean $PM_{10}\;and\;PM_{2.5}$ concentration in the platform located at underground was significantly higher than that of the ground (p<0.05). Conclusions: The levels of airborne fungi in the Seoul subway line 1-4 were not serious enough to cause respiratory disease in subway workers and passengers. This indicates that there is little correlation between airborne fungi and particulate matter.

Exposure Assessment of Dust and Airborne Microorganisms among Workers in a Clothing Shopping Center (의류쇼핑센터 근로자의 분진 및 부유미생물에 대한 노출평가)

  • Oh, Sung Eop;Kim, Ki Youn
    • Journal of Korean Society of Occupational and Environmental Hygiene
    • /
    • v.25 no.2
    • /
    • pp.194-201
    • /
    • 2015
  • Objectives: The purpose of this study is to assess the exposure level to dust and airborne microorganisms among employed workers in a clothing shopping center. Materials and Methods: On-site investigation of a clothing shopping center was performed between October and November 2012. The hazardous substances measured in this study are particulate matter(Total dust, respirable dust) and airborne microorganisms (Total airborne bacteria, total airborne fungi). Results: The highest geometric mean levels of particulate matter(total dust, respirable dust) for personal sampling were $1.735(SD:0.883)mg/m^3$ for total dust and $0.0711(SD:0.008)mg/m^3$ for respirable dust, respectively. Those for area sampling were $0.625(SD:0.091)mg/m^3$ for total dust and $0.0718(SD:0.012)mg/m^3$ for respirable dust, respectively. The highest geometric averaged concentrations of airborne microorganisms(Total airborne bacteria, total airborne fungi) were detected at $1,181(SD:105)cfu/m^3$ for total airborne bacteria and $683(SD:114)cfu/m^3$ for total airborne fungi, respectively. Concentrations of particulate matters and airborne microorganism in clothes shopping center did not correlate significantly with environmental factors such as temperature or relative humidity. Conclusions: Exposure levelshave not been established for service workers. Thus, health risk assessment for this group is very difficult. Health guidelines for service workers should be established as soon as possible.

Mutagenicity by Several Fractions of Organic Matter Extracted from Airborne Particulates Collected in atmosphere (대기중 부유분진에 함유된 유기물의 분획별 돌연변이원성)

  • Jang, Jae-Yeon;Kim, Bak-Kwang;Chung, Yong
    • YAKHAK HOEJI
    • /
    • v.33 no.1
    • /
    • pp.46-53
    • /
    • 1989
  • The extractable organic matter was extraced from airborne particulates collected in Seoul during 1986. It was fractionated to several fracrtions and mutagenicities of them were tested in Salmonella thyphimurium TA98 by Ames method. The neutral fraction showed the highest indirect acting mutagenicity while the highest direct acting mutagenicity was observed in the acidic fraction. Indirect acting mutagenicity of airborne particulate was attributed to its neutral fraction about 88% in average, to acidic about 10% in average and to basic fraction about 2% in average. Direct acting mutagenicity of airborne particulate was attributed to its neutral fraction about 70%, to acidic fraction about 29% and to basic fraction about 1%. Among five subfractions of neutral fraction, the proportion of mutagenicity of polynuclear aromatic hydrocarbon subfraction was 13.2% in indirect acting mutagenicity and 5.0% in direct acting mutagenicity.

  • PDF

Evaluation of genotoxic potentials in diesel exhaust particulate matter with the Ames test, the comet assay and the micronucleus assay

  • Kim, Soung-Ho;Lee, Do-Han;Han, Kyu-Tae;Oh, Seung-Min;Chung, Kyu-Hyuck
    • Proceedings of the PSK Conference
    • /
    • /
    • pp.165.1-165
    • /
    • 2003
  • This research was designed to examine the presence of mutagenic/carcinogenic compounds in airborne pollutants in diesel particulate matter using an integrated biological approach. Respirable air borne particulate matter (PM2.5: <2.5mm) was collected from diesel engine exhaust using a high-volume sampler equipped with a cascade impactor. (omitted)

  • PDF

Comparative Analysis of Elemental Components in Airborne Particulate Matter by k0-NAA Methods (대기분진의 원소분석에 대한 k0-NAA법의 비교)

  • Chung, Yong-Sam;Moon, Jong-Hwa;Cho, Hyun-Je;Kim, Young-Jin
    • Analytical Science and Technology
    • /
    • v.18 no.1
    • /
    • pp.51-58
    • /
    • 2005
  • A comparison of the analytical data obtained by three $k_0$-NAA software programs was carried out using both the airborne particulate matter collected from an urban site and the certified reference materials of the air filter and urban dust to evaluate the performance of the analysis. The individual $k_0$-NAA standardization methods of three countries, Korea, China and Vietnam which had been modified from the well established $k_0$-program were used for the comparative analysis. The measured concentrations of 30 elements from the two kinds of air samples based on this software were in agreement with each other within about 20% analytical error except for a few elements. By contrast, the results of China and Vietnam were moderately higher than that of Korea due to a systematic error associated with the detection efficiency, gamma peak analysis and geometric effect.

Reduction Effect of Air Cleaner on Particulate Matters and Biological Agents in a Swine Facility (공기정화기 적용에 따른 돈사 작업장내 입자상 물질 및 생물학상 물질 저감 효과에 관한 연구)

  • Kim, Ki Youn
    • Journal of Korean Society of Occupational and Environmental Hygiene
    • /
    • v.27 no.1
    • /
    • pp.70-76
    • /
    • 2017
  • Objectives: This on-site study was performed to evaluate the reduction efficiency of an air cleaner on particulate matters and biological agents in a swine facility. Materials and Methods: Particulate matter was measured using a real-time monitoring recorder and biological agents were sampled with a one-stage impactor and then analyzed based on the microbial culture method. An experimental process for the reduction effect on airborne pollutants through air cleaner operation consisted of three conditions: no treatment, wet scrapper by water spray and wet scrapper by disinfectant spray. Results: Geometric mean levels of particulate matter(TSP, $PM_{10}$, $PM_{2.5}$ and $PM_1$) were presented at $1,608{\mu}g/m^3$, $1,373.8{\mu}g/m^3$, $401.8{\mu}g/m^3$ and $144.5{\mu}g/m^3$ for no treatment; $1,503{\mu}g/m^3$, $1,017{\mu}g/m^3$, $159.4{\mu}g/m^3$ and $69.8{\mu}g/m^3$ for wet scrapper by water spray; and $1,222.17{\mu}g/m^3$, $477.17{\mu}g/m^3$, $33.2{\mu}g/m^3$ and $11.1{\mu}g/m^3$ for wet scrapper by disinfectant spray, respectively. In the case of biological agents, the geometric averaged concentrations of total airborne bacteria and fungi were as follows: $45,371cfu/m^3$ and $13,474cfu/m^3$ for no treatment, $43,286cfu/m^3$ and $8,610cfu/m^3$ for wet scrapper by water spray, and $2,440cfu/m^3$ and 1,867 cfu/ for wet scrapper by disinfectant spray, respectively. Regardless of particulate matter and biological agent, the highest concentrations were found for no treatment, while the lowest concentrations were found with wet scrapper by disinfectant spray. Conclusions: Based on the results obtained from this on-site evaluation, there was a significant reduction effect on particulate matter and biological agents through the application of an air cleaner in this study.

Evaluation on the Expected Purification Efficiency of Air Ion and Analysis on the Generated Amount of Negative Air Ions by Plants for the Purification of Particulate Matter in Air (지표대기 미세먼지 정화를 위한 식물체 음이온 발생량 분석 및 음이온의 미세먼지 기대정화지수 평가)

  • Oh, Deuk-Kyun;Ju, Jin-Hee
    • Journal of Environmental Science International
    • /
    • v.29 no.6
    • /
    • pp.623-631
    • /
    • 2020
  • This study analyzes the effect of negative air ions on the concentration of airborne particulate matter and evaluates the expected purification efficiency of open spaces for particulate matter by investigating the amount of negative air ions generated by plants. This study establishes a negative air ion generation treatment environment, plant environment, and control environment to measure the purification efficiency of particulate matter under the conditions of each, analyzing the expected purification efficiency by designing a particulate matter purification model. Results show that the amount of generated negative air ion according to environment was negative air ion generation treatment environment > plant environment > control environment; this order also applies to the particulate matter purification efficiency. Moreover, it took 65 min for the negative ion generation treatment environment, 90 min for the plant environment, and 240 min for the control environment to reach the standard expected purification efficiency of particulate matter concentration of 960 mg/㎥ for PM10. For PM2.5, with the designated maximum concentration of 700 mg/㎥, it took 60 min for the negative ion generation treatment environment, 80 min for the plant environment, and more than 240 min for the control environment. Based on these results, the expected purification efficiency compared to the control environment was quadrupled in the negative ion generation treatment environment and tripled in the plant environment on average.