• Title/Summary/Keyword: pollution reduction

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Impact of the Exclusive Median Bus Lane System on Air Pollution Concentrations in Seoul, Korea (서울시 중앙버스전용차로 도입의 부가적인 대기오염 영향성 평가)

  • Baik, Yeon-Ju;Kim, Da-Wool;Kwon, Hye-Young;Kim, Youngkook;Kim, Sun-Young
    • Journal of Korean Society for Atmospheric Environment
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    • v.34 no.4
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    • pp.542-553
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    • 2018
  • Since many previous studies reported the health effect of air pollution and indicated traffic as a major pollution source, significant policy efforts have been made to control traffic to reduce air pollution. However, there have been few studies that evaluated such policy implementation. In Seoul, Korea, the exclusive median bus lane system was implemented in 2004, and the metropolitan government applied air pollution reduction policies such as conversion of diesel buses to compressed natural gas buses and installation of emission control devices. This paper aimed to investigate the impact of the exclusive median bus lane system on air pollution reduction. Using hourly concentrations of particulate matter ($PM_{10}$) and nitrogen dioxide ($NO_2$) measured at 131 regulatory monitoring sites in Seoul and Gyeonggi-do for 2001-2014, we calculated annual and daily average concentrations at each site. We assessed the impact of the policy using differences-in-differences analysis by annual and daily average models after adjusting for geographic and/or meteorological variables. This method divides population into treatment and control groups with and without policy application, and compares the difference between the two time periods before and after the policy implementation in the treatment group with the difference in the control group. We classified all monitoring sites into treatment and control groups using two definitions: 1) Seoul vs. Gyeonggi-do; 2) within vs. outside 300 meters from the median bus lane. Pre- and post-policy periods were defined as 2001-2005 and 2006-2014, and 2004 and 2014 in the annual and daily models, respectively. The decrease in $PM_{10}$ concentrations between the two periods across monitoring sites in the treatment group was larger by $1.73-5.88{\mu}g/m^3$ than in the control group. $NO_2$ also showed the decrease without statistical significance. Our findings suggest that an efficient public transport policy combined with pollution abatement policies can contribute to reduction in air pollution.

The Effect of Pollution Reduction Program for Used Diesel Vehicles in Seoul Metropolitan Area: A Real Option Analysis (수도권 운행차 대기오염 저감사업의 효과: 실물옵션분석)

  • Park, Hojeong;Hong, Jong Ho
    • Environmental and Resource Economics Review
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    • v.23 no.3
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    • pp.435-451
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    • 2014
  • This paper attempts to evaluate an environmental regulation program which enforces installation of filtering equipment to reduce major air pollutants from used diesel vehicles. A real option model is presented to incorporate fuel cost uncertainty and irreversibility of emission-reducing investment. A finite-life option based on finite difference method is developed to consider the limited life expectancy of used vehicles. After taking into account social benefits from emission reduction and costs from decreasing fuel efficiency after the adoption of filtering technology, the result finds overall positive performance of the Pollution Reduction Program. However, the result suggests that the Program be designed to be more specific to vehicle types to improve program performance.

An Analysis of the Impact of China's Pollution Reduction Policy on Sulfur Dioxide Emissions (중국의 오염저감 정책이 이산화황 배출에 미치는 영향 분석)

  • Kim, Ka Young;Lee, Jae Seung
    • Journal of Climate Change Research
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    • v.6 no.4
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    • pp.367-377
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    • 2015
  • This study analyzed the effectiveness of China's policy to reduce of sulfur dioxide. China's $12^{th}$ Five-year plan on national economic and social development emphasized environmental protection and low-carbon economic development. Sulfur dioxide was one of the major gases to affect air pollution and climate change and its control became a key policy agenda in the environment and energy sector. As the absolute amount of sulfur dioxide emissions in China came from the industrial sector, the control of the coal-based energy was especially urgent. This study analyzed the factors that influenced the sulfur dioxide emissions and the policy effects to reduce sulfur dioxide in China from 2003 to 2012 based on regional data. The air pollution treatment investments showed the biggest impact together with energy conservation policy in reducing sulfur dioxide emissions. However, pollutant emissions charge did not show a relevant policy effectiveness in all regions as the amount of charge would be smaller than economic benefit from non-compliance. Rationalizing pollutant emissions charge is, therefore, a key policy task for further reduction of sulfur dioxide emissions.

Analysis of NPS Pollution reduction from No-till Field (무경운 밭에서의 비점오염물질 저감효과 분석)

  • Lee, Su In;Won, Chul Hee;Shin, Min Hwan;Shin, Jae Young;Jeon, Je Hong;Choi, Joong Dae
    • Journal of The Korean Society of Agricultural Engineers
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    • v.57 no.4
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    • pp.51-59
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    • 2015
  • Various Best Management Practices (BMPs) have been suggested to reduce soil erosion and non point source (NPS) pollutant loads from agricultural fields. However, very little research regarding water quality improvement with No-till (NT) has been performed in Korea. Thus, effects of NT were investigated in this study. The objective of the study was to investigate the effect of NT on the surface runoff and sediment discharge in a field. Eight experimental plots of $5{\times}30m$ in size and 3 % or 8 % in slope prepared on gravelly sandy loam soil were treated with Conventional-till (CT) and NT. Runoff and NPS pollution discharge were monitored and compared the treatments. The amounts of rainfall from 13 monitored events ranged from 28.7 mm to 503.5 mm. The runoff amount was reduced by 17.6~59.2 % in 3 % NT and 29.6~53.2 % in 8 % NT. The average NPS pollution loads of the 3 % NT plots and 8 % NT plot were reduced about 45.1~89.2 % and 47.7~98.0 % compared to those of the CT plots, respectively. This research revealed that NT can reduce the NPS pollution loads substantially as well as increase the crop yield. Runoff and NPS pollution loads reduction by NT method could be contribute to improve the water quality of streams in agricultural regions.

A Study on the RTC romote system of Water Environment for Wireless Network

  • Sung, Kyung
    • Journal of information and communication convergence engineering
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    • v.7 no.4
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    • pp.465-468
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    • 2009
  • There is to solution the environmental data which the importance is seriously taken into consideration in the the 21st century that is set up whether or not be a welfare society advanced country according to quality of life elevations through environments in question to a preferential assignment for an environmental control will decrease of measures, and be proceeded so as to be urgent. However, shall get measurement of a correct environmental pollution duty and reduction measures stopped on bases of the data which there is reliability, and decrease excessive pollution than what, and may overcome efficiency of waste of cost environmental pollution management. Environmental pollution data collected are regarded as important, and, specially, a collection of environmental data forecast a pollution circle, or to analyze future development is important very at an environmental policy decision or decision making step to be national besides pollution reductions.

The need to develop Nitrogen Oxides(NOx) Reduction Equipment and Regulation in Marine (선박용 질소산화물(NOx) 저감장치 개발의 필요성 및 규제현황)

  • Kim, Sungyun;Kim, Min
    • 한국연소학회:학술대회논문집
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    • 2012.04a
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    • pp.69-74
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    • 2012
  • Looming global environmental pollution problems around the world movement to minimize the environmental pollution is actively taking place. International Maritime Organization (IMO) a significant portion of the marine pollution by exhaust gases emitted from vessel considered, and accordingly developed around the ship and ship-related environmental regulations, emission standards are going to strengthen gradually, the development of environmentally friendly vessels and equipment is proceeding actively.

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Organic fouling in forward osmosis (FO): Membrane flux behavior and foulant quantification

  • Xia, Shengji;Yao, Lijuan;Yang, Ruilin;Zhou, Yumin
    • Membrane and Water Treatment
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    • v.6 no.2
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    • pp.161-172
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    • 2015
  • Forward osmosis (FO) is an emerging membrane technology with potential applications in desalination and wastewater reclamation. The osmotic pressure gradient across the FO membrane is used to generate water flux. In this study, flux performance and foulant deposition on the FO membrane were systematically investigated with a co-current cross-flow membrane system. Sodium alginate (SA), bovine serum albumin (BSA) and tannic acid (TA) were used as model foulants. Organics adsorbed on the membrane were peeled off via oscillation and characterized by Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM). When an initial flux of $8.42L/m^2h$ was applied, both flux reduction and foulant deposition were slight for the feed solution containing BSA and TA. In comparison, flux reduction and foulant deposition were much more severe for the feed solution containing SA, as a distinct SA cake-layer was formed on the membrane surface and played a crucial role in membrane fouling. In addition, as the initial SA concentration increased in FS, the thickness of the cake-layer increased remarkably, and the membrane fouling became more severe.

Current Status of Air Pollutants from Ships and Reduction Technologies (선박 기인 대기오염물질 현황 및 저감 기술 소개)

  • Jun-Seong Park;Seung-Ho Ham;Da-yeong Kang;Hee-Yeon Park;Jongkwan Park
    • Journal of the Society of Naval Architects of Korea
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    • v.61 no.2
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    • pp.135-142
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    • 2024
  • There is a lot of concern around the world about air pollution from ships. The majority of air pollution from ships comes from fuel combustion. The combustion process produces various air pollutants such as carbon monoxide (CO), carbon dioxide (CO2), nitrogen oxides (NOx), sulfur oxides (SOx), and particulate matter (PM), each of which has adverse effects on people and is a major environmental problem. To prevent this, the International Maritime Organization (IMO) has strengthened the regulation of pollutant emissions through the Convention for the Prevention of Marine Pollution. This paper discusses the types of air pollutants emitted by ships, their current status, and the latest technologies to reduce emissions of NOx and SOx.

A Study on the Effect of Abelmoschus Manihot Jinhuakui Extract on Odor Reduction

  • Gok Mi Kim
    • International Journal of Advanced Culture Technology
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    • v.12 no.1
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    • pp.281-286
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    • 2024
  • With the commercialization and full-timeization of the livestock industry, civil complaints continue to increase, and the livestock industry is facing a crisis due to social problems such as odor caused by livestock manure, soil pollution, water pollution, and environmental pollution. In order to increase productivity in livestock farms, the amount of livestock manure generated is increasing due to excessive use of protein feed and high-density breeding environment, and complaints such as odor and water pollution due to management problems are increasing rapidly. Livestock odor has emerged as a serious social problem, and due to growing complaints, conflicts between the Ministry of Agriculture and Forestry and the Ministry of Environment are even causing the livestock industry to lower its status. There is an urgent need for solutions to identify problems in the livestock industry and improve policies. This study aims to develop a " Abelmoschus Manihot Jinhuakui " brand that can improve the intestinal environment of livestock, reduce odors caused by livestock excrement, and improve the productivity of livestock farms in order to improve the increasingly serious odor problem in livestock sites. For Jeju livestock farms, which place more importance on the environment by securing tourists, eco-friendly feed additives were applied to the experiment, the results were derived, and the focus was on solving fundamental problems of odor generation through the development and packaging of feed additive brands. We aim to fundamentally solve the odor problem of domestic livestock farms, secure eco-friendly livestock farms, and contribute to reducing livestock odors and increasing productivity through research results that reduce ammonia levels in each livestock farm.

On Air Pollution and Visibility Reduction in Seoul (서울의 대기오염과 시정감소)

  • 최정숙;정용승
    • Journal of Korean Society for Atmospheric Environment
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    • v.9 no.1
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    • pp.51-60
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    • 1993
  • In order to study on the cause of visibility aggravation, we have selected the days of low-visibility observed in Seoul with haziness that was below 6km from 12 to 15 LST. According to the examinations, the number of low-visibility days satisfying the criteria is 30 days in 1989, 39 days in 1990, and 35 days in 1991, respectively. The annual number of low visibility days appears to increase mainly due to an increase in emission of air pollutants and in anthropogenic water vapor in the biosphere. The relationship between visibility and air pollutants(TSP, $NO_2, SO_2, O_3$) of selected days is also studied. Air pollution concentrations of selected days are much higher than those of other days. It is observed that the cause of visibility aggravation in Seoul is mainly smog and air pollutants. In particular, the visibility reduction and high $SO_2$ concentrations at Seoul in winter are similar phenomena that occurring with London smog, while the visibility reduction and high $O_3$ concentrations at Seoul in summer are also similar to the type of Los Angeles smog.

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