• Environmental Engineering Research
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• 제25권3호
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• pp.384-392
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• 2020

The presence of high fluoride concentration (> 1.5 mg/L) in water causes serious health problems such as fluorosis, infertility, brain damage, etc., which are endemic to many places in the world. This study has investigated the fluoride removal capacity of the novel activated biochar (BTS) and hydrochar (HTS) using Teff (Eragrostis tef) straw as a precursor. Activated biochar with mesoporous structures and large specific surface area of 627.7 ㎡/g were prepared via pyrolysis process. Low-cost carbonaceous hydrochar were also synthesized by an acid assisted hydrothermal carbonization process. Results obtained from both adsorbents show that the best local maximum fluoride removal was achieved at pH 2, contact time 120 min and agitation speed 200 rpm. The thermodynamic studies proved that the adsorption process was spontaneous and exothermic in nature. Both adsorbents equilibrium data fitted to Langmuir isotherm. However, Freundlich isotherm fitted best for BTS. The maximum fluoride loading capacity of BTS and HTS was found to be 212 and 88.7 mg/g, respectively. The variation could primarily be attributed to a relatively larger Surface area for BTS. Hence, to treat fluoride contaminated water, BTS can be promising as an effective adsorbent.

• 청정기술
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• 제29권1호
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• pp.1-9
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• 2023

군에서의 폐탄약 및 제조업체에서 생산 중에 발생되는 불용화약 등 폐화약류는 지속적으로 발생되고 있다. 이들은 화재, 폭발 등을 유발하는 화약류의 위험성으로 일반 폐기물 처 리시설에서는 처리가 어려우며, 지정된 폐기처리시설에서 야외 소각 및 기폭처리를 하는 것이 고전적인 폐기처리 방법이다. 야외에서의 소각 및 기폭을 통한 폐기처리시에는 SO_x, NO_x와 같은 유해물질의 배출에 의한 대기오염, 중금속 및 난분해성 물질로 인한 토양 및 수질 오염 등 다양한 환경문제를 유발시킨다. 이러한 환경문제를 극복하기 위한 친환경적인 다양한 폐기처리 방안이 개발되고 있으며, 일부 국가에서 운영중에 있다. 본고에서는 폐화약류의 다양한 친환경적인 폐기처리 공정 및 각 공정에 있어서의 장, 단점을 소개하여 폭발성 위험물 및 유해물질처리의 향후 연구방향을 제안하고자 한다.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 1998년도 공동 심포지엄 및 추계학술발표회
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• pp.221-224
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• 1998

Environmental pollution is continuously increasing with the economic growth and industrial development. With this trend, soil and groundwater pollution problem has been surfaced as important social issues. Recently, Korean government promulgated the Soil Environment Conservation Act. But there are many problems to control sound soil quality management. Anthropogenic source of pollution such as waste landfill, pesticides, fertilizer, underground storage oil tanks is important as well as natural source such as acid rain and forest fire. The regulation should be expanded to include groundwater preservation as well as soil quality, because soil pollution is closely related to groundwater pollution. Therefore, legal regulations must be expanded to these facilities and take into account technical feasibility and finance.

• 환경위생공학
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• 제12권3호
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• pp.41-49
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• 1997

In South Korea since 1970s the rapid development of economic growth has brought about "Urbanization" in many areas and also raised the level of people's life in many ways. At the same time, however, the industrialization and overpopulated districts in many areas have caused the problems of air pollution in necessary. Among those air pollution, in particular, in large cities has become more serious since 1990s than before. Air pollution, like TSP and SO$_{x}$ caused by heating, generation of electric power and industrialization in 1980s, showed as that of the type of an underdeveloping country and was not hazardous enough to people in the least. Unfortunately, in 1990s NO$_{x}$, CO and O$_{3}$ caused by the soaring numbers of many types of cars have exhausted air pollutant more hazardous as the same air pollution type of many developed countries. So, the purpose of this study would be to analyze the changes of concentration of NO$_{x}$ and CO on environmental air by traffic volume and from the side drive way to the degree of distance in Sungnam City, and recognize the citizens' consciousness to air pollution and suggest the best walking point in part, and plan to design the reasonable use of cars and finally make the air quality improve toward the better-ment in part. From the research result we can know that people walking in the street would be protected from the hazardous air pollutant caused by the cats if they walk apart from a drive way as far as they can in the street. Accordingly, it might, to minimize th affect of air pollution, be thought to be desirable that the consideration of in introduction the system that the vehicle using the diesel engine motor should use the centered-lane aparted from road. Another to be desirable is that along side the road, the trees inhaled the pollution should be planted.

• 한국대기환경학회지
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• 제34권3호
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• pp.373-392
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• 2018

The emission of air pollutants in China has increased rapidly as its economy expanded over the last decades. The Chinese government has recently acknowledged the seriousness of the resulting air pollution and is trying to improve air quality in many ways. Here, we review the air quality control and management policies in China, one of our closest neighbors, because these policies may also influence the air quality in Korea. This study examined the recent policies on $PM_{2.5}$ reduction and analyzed the variation in air quality and air pollutant emissions in China. The ambient air quality and emission standards in China have been strengthened, based on China's Air Pollution Prevention and Control Action Plan of 2013. As a result, the annual mean concentration of $PM_{2.5}$ in 2015 in 74 large Chinese cities declined by 23.6% compared with 2013 values. Coal consumption in China also has been reduced by more than 10% per year since 2013. Furthermore, the laws controlling atmospheric emissions were revised again in 2016, and an air pollution forecasting and warning system was implemented to help manage air pollution problems. At present, the Chinese government is trying to evaluate its policies on $PM_{2.5}$ and find a new paradigm to mitigate ongoing $PM_{2.5}$ pollution. In this context, a joint study between Korea and China has been initiated to investigate the characteristics and sources of ambient $PM_{2.5}$ and to identify factors contributing to the high $PM_{2.5}$ concentrations in northeast China. We expect that this academic collaboration will benefit both countries in their search for new policies for $PM_{2.5}$ reduction.

• 한국환경교육학회지:환경교육
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• 제9권1호
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• pp.72-89
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• 1996

Environmental problem and eco-crisis don't mean pollution itself any more, although general people have believed that environmental problems can be resolves by removing pollution. The mos important is environmental problems are linked with social structure which individualism, rationalism is extremely prevailed in the market oriented capitalism society, so public value is ignored especially. In the point of environmental education, this is very important because environmental education is not completed through schooling process, such s class learning, discussion. observation etc, but in the our practical life itself. This means that environmental education can be done by changing of lifestyle anywhere we live, and anytime. But any places governed our social life are polluted by efficiency pursuiting individualism in market oriented capitalism society. So environmental education can't hold the water in this system, in the aspect that we can't stimulate feelings of the student and general people, getting to public resource value and harmony with nature by throwing individual mind away. It is big problem. In this field, I have thought the unique space and social structure which can be used as environmental education place is small-planning community, such as Kibbutz in Israel, educational community Finhorn in Scotland, harmony community Yamagicism Village in Japan and DURE in Korea etc. For the research of this educational possibility in these small community, I visited and investigated immediately, and confirmed. In this thesis, I insist that the training process and practical life experience in this community themselves are good environmental education. So, in case of YAMAGICISM in Japan and FINDHORN in Scotland, DONGSASUP program in Korea, I introduce these small community environmental- education program.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2000년도 제 25회 정기총회 및 추계학술발표회
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• pp.195-212
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• 2000

More and more people have suffered from the environmental pollution caused by the rapid development of our industry. They wat to be compensated for loss an furthermore hope to prevent their neighbor circumstances from being polluted. It's the reason why the environmental action occurred. Our team will clarify our environmental right, the process of environmental action and general problems of our current system. On the basis of them we will present several improvable methods.

• 환경위생공학
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• 제24권1호
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• pp.1-12
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• 2009

The various environmental problems that we face on today are basically about environmental quality. Since early 1960s affluent material was produced because of remarkable economic growth by many cooperations. However, for the lack of environmental policy, environmental pollutions has been serious. The central government should transfer the producing and consuming structure to environmental affinity through the regulations for developing Korea as a model of environmental nation which takes an active part in global environmental programme and in which the environment and economy are well harmonized. Moreover, the central government should take the lead in prevention of environmental pollution through the direct policies such as strengthening the discharge limit or setting up environmental basic institutions by securing budget for conserving environment. This thesis emphasize on the public institution among many environmental basic institutions for environmental anti-pollution project. It will find the problems with running those institutions, and will suggest the preview of improvement. Also, it is necessary to investigate of variation trend for inflow and pollutant loading to environmental infrastructure as increased of the diffusion rate as established and maintenance of sewer system. The purpose of this study is to investigate for inflow and pollutant loading to environmental infrastructure, and also to provide the method of efficiently maintenance and management. The results obtained were summarized as follows; 1. Survey of actual condition on operation and management of environmental infrastructure was evaluated the propriety of treatment process and problem of plant management. 2. Analysis of pollutant loading contribution for river system of environmental infrastructure with data analysis of water quality measuring network. 3. To investigate on case study for efficiently maintenance and management of environmental infrastructure. The result on this study was provide the method of efficiently maintenance and management with survey for establish and repair of sewer system and survey of actual condition on operation and management of environmental infrastructure in the water area of discharge to Geum River System. Application as guideline for establish and management of environmental infrastructure, and management of Geum River System. Also, application for preliminary data for fulfill-assess of total effluent regulation of water pollution.

• 환경정책연구
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• 제8권2호
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• pp.145-164
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• 2009

환경세를 비롯한 경제적 유인수단이 직접규제 방식의 환경정책수단보다 비용 효율적이고 오염저감기술개발의 유인을 제공하는 장점이 있기 때문에 우리나라에서도 1990년대 들어서부터 환경세 도입 및 환경친화적 세제개편에 대한 논의가 활발하게 진행되고 있다. 그러나 환경세가 무역경쟁력에 미치는 부정적 영향에 대한 우려가 현실적으로 환경친화적 세제개편을 단행하기 어려운 장애요인으로 작용하고 있다. 따라서 환경세의 부정적인 파급효과를 최소화하기 위하여 환경세의 도입은 철저하고 신중한 사전 준비를 통하여 이루어져야 하는데, 본고에서는 이에 대한 기초연구로서 환경과 무역을 연계한 국제적 논의의 추세와 국내외 선행연구를 개관하고, 환경세가 무역에 미치는 영향에 대한 이론분석결과를 제시하였다. 환경세가 무역에 미치는 영향에 있어서는 다른 나라보다 높은 환경세를 부과하는 경우, 오염유발산업보다 친환경적인 산업이 무역에 있어서 가격경쟁력이 있다는 결과를 도출하였다. 이는 환경세를 도입하는 경우 친환경적인 산업에 경쟁력 인센티브를 제공하여 중장기적으로 오염저감기술을 개발하는 긍정적인 효과를 기대할 수 있으며, 정부의 입장에서는 환경친화적인 산업 등을 육성, 지원하는 것이 환경개선과 동시에 무역부문에서의 국제경쟁력을 제고시키는 정책방향임을 시사한다.

• 한국CDE학회논문집
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• 제17권6호
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• pp.387-397
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• 2012

The world has faced with various environmental problems such as climatic change, global pollution, and depletion of natural resources. Conventional economic development continues not only to intensify the magnitude of the problems but also to damage growth potential of future generations. Therefore, recent manufacturers are highly required to accommodate themselves to sustainable development that aims at preventing the loss to the future generations. Moreover, the manufacturers are under heavy pressure from various environmental regulations. This paper proposes green bill of material (Green-BOM) which conforms to the environmental regulations to restructure eco-friendly manufacturing system. Green-BOM is useful for managing green product and process information to satisfy several environmental regulations by recording energy consumption, recycle rate, volatile organic compounds (VOCs), substance information, and so on.