• Title, Summary, Keyword: Particulate matter

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Studies on the Seasonal Variations of Plankton Organisms and Suspended Particulate Matter in the Coastal Area of Ko-Ri

  • Choe, Sang
    • 한국해양학회지
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    • v.7 no.2
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    • pp.47-58
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    • 1972
  • Densities and composition of phytoplankton and zooplankton, concentrations of particulate organic carbon, particulate organic nitrogen, and particulate inorganic matter were determined in the coastal area of Ko-ri during one year. There are peaks of densities of plankton organisms in summer, autumn, and spring Concentrations of particulate organic carbon ranged from 35 to 3,785 mg/㎥ (averaging 868mg/㎥ ), particulate organic nitrogen ranged from 4.4 to 158mg/㎥ (averaging 45mg/㎥), inorganic suspended matter ranged from 0.6 to 11.6 mg/L (averaging 5.7mg/L), and the carbon-nitrogen ratios of the suspended matter were varied from 0.5 to 231(averaging 35), with each seasonal cycle. The phytoplankton density and particulate organic carbon were possitively correlated from March to November, negatively from December to February, and the zooplankton dinsity and particulate organic nitrogen were well correlated.

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Analysis of Heavy Metal Element and Microorganism by Manufacture of Particulate Matter Sampler for Science Project of Secondary School (중등학교에서 사용 가능한 미세먼지 포집 장치 제작을 통한 대기 중 중금속 및 미생물 분석)

  • Kwon, Woo-Jin;Kim, Young-Jae;Byeon, Jung-Ho
    • Journal of the Korean earth science society
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    • v.36 no.1
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    • pp.125-135
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    • 2015
  • The purpose of this study were to sample particulate matter and analyze its elements and microorganisms for secondary school science project. The particulate matter was sampled on the rooftop a four-store building at a university in Chungju province. A simplified capturing system was developed with the parts, motor-pump, innet, $1.0{\mu}m$ teflon filter, filter-holder, etc. Using the system, this study had sampled particulate matter during Dec., 2013-Jun., 2014. Then, this study analyzed the elements and microorganisms of the sampled particulate matter. Results have been shown that the particulate matter derived China urban area is mainly consisted of the artificial pollutant, such as Cu, Zn, Cd, Ni, Pb. In addition, this study has been shown that microorganisms, such as bacteria and fungi, are included in the particulate matter. Therefore, this study suggests a new systemic investigation and monitoring about the particulate matter, specially originated from China. Also, this study provides a sample for secondary school science experiment.

Bioassay-Directed Chemical Analysis of Mutagens in Diesel Exhaust Particulate Matter (Dep)

  • Kim, Soung-Ho;Jang, Hyoung-Seok;Lee, Do-Han;Kim, Yun-Hee;Ryu, Byung-Taek;Oh, Seoung-Min;Chung, Kyu-Hyuck
    • Proceedings of the Korean Society of Toxicology Conference
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    • pp.153-153
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    • 2003
  • It has been reported that exposure to particulate matter is linked to increase lung cancer risk. Recently it is confirmed that diesel exhaust particulate matter (DEP), which derives from diesel powered vehicles, is contributed as a major pollutant in urban air-borne particulate matter.(omitted)

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Estimating Social Benefits According to Exhaust Gas Reduction Devices (DPF) (배출가스 저감장치(DPF) 부착에 따른 사회적 편익 추정)

  • Choi, Soungkyu;Kim, Yongdal;Kim, Hogyeong;Bae, Jinmin
    • Journal of Auto-vehicle Safety Association
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    • v.10 no.3
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    • pp.27-31
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    • 2018
  • The People have a bad perception about diesel vehicle because of serious air pollution, increase fine dust and global vehicle company's diesel gate. Starting the project in 2005, Ministry of Environment has been supporting that is exhaust gas reduction devices (DPF) on diesel vehicles in the metropolitan area. During the period of 2017.01.01 to 2017.12.31, 10,030 diesel vehicles installed exhaust gas reduction devices (DPF). Among them, 9,921 diesel vehicles that they have sufficient data for analysis were analyzed amount of particulate matter reduction before and after exhaust gas reduction devices (DPF) was installed. Opacity smoke meter measures the concentration of particulate matter. So concentration of particulate matter was converted into a mass unit, and then calculated the total amount of reduced particulate matter. It was estimated that social benefits is costs required to remove it from the total amount of particulate matter.

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
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    • v.29 no.6
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    • pp.623-631
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    • 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.

A Survey on the Recognition by Youth of Particulate Matter for Sustainable Residential Environment Education: Focused on the Jeonbuk Area (지속가능한 주거환경교육을 위한 청소년의 미세먼지에 대한 인식 조사: 전북지역을 중심으로)

  • Baek, Min Kyung;Hwang, Myung Rang
    • Family and Environment Research
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    • v.57 no.4
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    • pp.535-544
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    • 2019
  • This study analyzes the need for appropriate response education in schools for national health and sustainable development education in connection with particulate matter, which has recently emerged as a serious environmental and social problem. The survey was conducted on 1,200 teenagers(middle and high school students) in North Jeolla Province. The results of the study are as follows. First, the survey results were generally low in terms of environmental attitude and response(actuality) as well as the level of knowledge of particulate matter. Second, particulate matter-related education is rarely conducted at school sites; therefore, it is also necessary to develop an environmental education programs that can be a significant educational experience along with a specific educational orientation that is required to ensure the achievement of sustainable residential environment education. Finally, we hope that this study will help raise awareness on sustainable residential environment education amid difficulties in accessibility. Issues that need further study include: the absence of education materials, environmental education related to particulate matter, and guidance on how to maintain healthy living for individuals that help increase interest in a sustainable living environment for future generations.

International Comparison of National Elementary Science Curriculum and Science Textbook on Introduction of Particulate Concept (물질의 입자적 관점 도입에 대한 초등과학 교육과정 및 교과서 국제 비교)

  • Sim, Byeongju;Yoon, Heesook
    • Journal of Korean Elementary Science Education
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    • v.37 no.2
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    • pp.147-160
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    • 2018
  • The purpose of this study is to compare the elementary science curriculum and textbooks of Korea, the United States, Japan, and Singapore to know how the contents on particulate concept of matter is introduced and expressed. In Korea, particulate concept of matter was adopted as a term for 'molecules' in the 3rd through 6th curriculum, and the term for 'particles' was adopted in the 2009 revised curriculum. In the United States, NGSS adopted the term 'particle' in fifth grade. Japan presented the concept of 'particle' as a core concept of matter in the commentary, and the expressions 'particles' were being introduced in the textbooks. But it did not cover particulate nature of matter at the elementary school level in Singapore. An analysis of elementary textbooks in Korea, the United States and Japan except Singapore showed particulate expressions in 'dissolution', 'state change of water', 'gas pressure and volume', 'combustion and extinguishment' units. Korean textbook was only being introduced in 'dissolution' and 'gas pressure and volume', but in the textbooks of Japan and the United States, water was expressed as particles in 'state change of water' unit. Discussion and implication on the introduction of particulate concept to elementary science curriculum and textbooks were suggested based on the results.

Characteristics and Management of Particulate Matter(PM2.5) Emission on Cooking Condition (주방 조리시 미세먼지(PM2.5) 배출 특성과 관리방안)

  • Lee, Myeonggu;Jeong, Myeongjin;Kang, Minji
    • The Journal of the Convergence on Culture Technology
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    • v.4 no.1
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    • pp.325-329
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    • 2018
  • There are many pollutants in the residential space due to building materials, ventilation, cooking, etc. Among them, particulate matter is a primary carcinogen and very harmfull to the human body, it occurs mostly in cooking. Therefore, in order to manage the indoor air quality well, it is necessary to evaluate the relationship between the concentration of particulate matter generated during cooking and ventilation method. In this study, we propose a management method and particulate matte which occurs during the kitchen cooking by measuring and analyzing the concenteation change of particulate matter(PM2.5) according to the type of food and the ventilation method.

Characteristic of In Situ Suspended Particulate Matter at the Gwangyang bay Using LISST-100 and ADCP (LISST-100과 ADCP를 이용한 광양만 현장 부유입자물질 특성 연구)

  • Lee, Byoung-Kwan;Kim, Seok-Yun
    • Journal of Environmental Science International
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    • v.18 no.11
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    • pp.1299-1307
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    • 2009
  • In order to measure in-situ suspended particle size, volume concentration of suspended particulate matter and current speed, mooring observation was performed at the Gwangyang Bay by using of an optical instrument, 'LISST-100' and an acoustic instrument, 'ADV'(St. S1). And the sediment flux was obtained based on the concentration of suspended particulate matter and current speeds measured at three lines of Gwangyang Bay during ebb and flood tide of August 2006. To investigate the spatial variation of suspended particulate matter, profiling observations were measured difference echo intensity and beam attenuation coefficient by using of ADCP and Transmissometer (Line A, B, C). The suspended sediment flux rate at the mouth of Gwangyang Bay was observed to be higher during asymmetrical than symmetrical of current speeds. The flux of suspended particulate matter concentration and current speeds were transported to southeastern direction of surface layer and northwestern direction of bottom layer at the western area at line A of Gwangyang Bay. Small suspended particles have been found to increase attenuation and transmission more efficiently than similar large particles using acoustic intensity (ADV/ADCP) or optical transmit coefficient (LISST-100/Transmissometer). The application and problems as using optical or acoustic instruments will be detected for use in time varying calibrations to account for non-negligible changes in complex environments in situ particle dynamics are poorly understood.

Design of Particulate Matter Measurement System based on LoRa LPWA (LoRa LPWA 기반 미세먼지 측정 시스템 설계)

  • Cho, Kyoung-woo;Jung, Yong-jin;Oh, Chang-heon
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.569-570
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    • 2018
  • Recently, Although particulate matter monitoring has been attracting attention as a result of social attention to the human impact of particulate matter, data suitable for the residential environment can not be obtained due to imbalances in the installation of monitoring stations and differences in topography. In this paper, we propose LoRa LPWA-based particulate matter measurement system which can make long distance wireless communication to measure particulate matter in residential environment. In the proposed system, it is possible to collect the data of the external environment which is difficult to construct the internet by utilizing LPWA which is a long distance wireless communication technology. When the proposed system is applied to the residential environment, it is expected to provide particulate matter monitoring information suitable for the residential environment.

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