• 청정기술
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• 제5권2호
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• pp.1-12
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• 1999

세정공정은 여러 산업체의 생산공정에 활용되고 있는 공정으로서 세정과정중 다양한 환경 오염물질을 배출하고 있다. 따라서, 환경 및 안전규제가 국내외적으로 엄격하여짐에 따라 기존의 세정공정에서 사용되었던 세정제를 환경문제나 유해성 문제를 야기시키지 않는 환경친화적인 세정제로 대체하는 것이 절실한 실정이다. 대체세정제를 선정하기 위해서 기존의 세정제에 필적할 만한 세정성을 갖춰야 하지만 세정성 평가방법이 정립되어 있지 않은 실정이다. 따라서 본 연구에서는 실험실이나 산업체에서 활용 가능한 여러 가지 세정평가법을 정리하여 보았고 국내외 현장 적용사례를 조사 분석하였다.

• 한국재료학회지
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• 제19권3호
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• pp.169-173
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• 2009

In chemistry, the study of sonochemistry is concerned with understanding the effect of sonic waves and wave properties on chemical systems. In the area of chemical kinetics, it has been observed that ultrasound can greatly enhance chemical reactivity in a number of systems by as much as a million-fold. Nano-technology is a super microscopic technology in which structures of 100 nanometers or smaller can be investigated. This technology has been used to develop $TiO_2$ materials and $TiO_2$ devices of that size. Thus far, electrochemistry methods and photochemistry methods have generally been used to create $TiO_2$ nano-size particles. However, these methods are complicated and create pollutants as a by-product. In the present study, nano-scale silver particles (5 nm) were prepared in a sonochemistry method. Sonochemistry deals with mechanical energy that is provided by the collapse of cavitation bubbles that form in solutions during exposure to ultrasound. $TiO_2$ powders 25 nm in size doped with Ag were formed using an ultrasonic sound technique. The experimental results showed the high possibility of removing pollution through the action of a photocatalyst. This powder synthesis technique can be considered as an environmentally friendly powder-forming processing owing to its energy saving characteristics.

• 한국표면공학회지
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• 제56권4호
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• pp.259-264
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• 2023

As the demand for lithium-ion batteries, a key power source in electric vehicles and energy storage systems, continues to increase for achieving global carbon neutrality, there is a growing concern about the environmental impact of disposing of spent batteries. Extensive research is underway to develop efficient recycling methods. While hydrometallurgy and pyrometallurgy methods are commonly used to recover valuable metals from spent cathode materials, they have drawbacks including hazardous waste and complex processes. Hence, alternative recycling methods that are environmentally friendly are being explored. However, recycling spent cathode materials still remains complex and energy-intensive. This study focuses on a novel approach called solid-state synthesis, which aims at regenerating the performance of spent cathode materials. The method offers a simpler process and reduces energy consumption. Optimal heat treatment conditions were identified based on experimental results, contributing to the development of sustainable recycling technologies for lithium-ion batteries.

• 화약ㆍ발파
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• 제28권2호
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• pp.99-107
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• 2010

국내 발파해체기술은 저층위주로 개발, 적용되어 왔으며 1970년대 이후 건축된 고층 RC 라멘조의 내구연한으로 재건축이 필연적으로 예상돼 경제적이고 안전하며 친환경적인 발파해체기술의 개발이 요구되었다. 이에 따라 저층구조물에 적용되었던 발파해체 요소기술을 고층구조물에서 활용할 수 있도록 적용시험을 수행하였다. 고층구조물 발파해체를 위한 요소기술의 정립과 현장 적용성 여부를 판단하고, 문제점 발생 시 개선방안을 제안 해 고층건물에 대한 발파해체 기술을 개발하고자 대전 중앙데파트 발파해체현장에서 방호방법의 현장검증시험과 분진저감을 위한 물대포 현장 적용시험 및 최적천공방법 선정을 위한 요소시험을 수행해 발파해체 요소기술의 신뢰성 확보와 적용성을 확인하였다. 본 논문은 고층건물 철거 시 친환경적이고 안전하며 경제적인 발파해체 공법을 국내 기술로 시공할 수 있는 능력을 알려 외국 철거업체의 국내 철거시장진입을 방지하고 국내 해체산업의 경쟁력 제고에 이바지하고자 한다.

• 한국응용곤충학회지
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• 제51권4호
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• pp.371-376
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• 2012

본 시험은 온도 발육모델을 이용하여 꽃매미 알의 부화시기를 예측하고 약충과 성충 방제에 효과적인 친환경 자재선발 및 끈끈이트랩 색상별 유인효과를 찾기 위하여 수행하였다. 꽃매미 알은 15, 20, $25^{\circ}C$(14L:10D)에서 각각 55.9, 26.8, 21.6일 만에 부화하였고 부화율은 각각 61.9, 57.8, 30.4%로 온도가 높을수록 부화소요기간은 짧고 부화율은 낮았다. 알의 온도와 발육속도와의 관계식은 Y=0.0028X-0.0228 ($R^2$=0.9561)이었으며, 발육영점온도는 $8.14^{\circ}C$, 유효적산온도는 355.4일도였다. 위의 관계식에 의하여 전남지역 꽃매미 알의 부화시기는 5월 22일로 예측되었다. 꽃매미 약충방제에 효과적인 친환경자재는 제충국추출물, 고삼추출물, 데리스추출물이었고, 성충은 제충국추출물, 고삼추출물이었다. 황토색, 파랑색, 노랑색 끈끈이트랩 중에서 황토색끈끈이트랩의 유인량은 2주 동안에 약충 535마리, 성충 87.7마리였다. 황토색 끈끈이트랩은 꽃매미 약충과 성충의 유인포살효과가 우수하였다.

• 한국의상디자인학회지
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• 제19권2호
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• pp.15-28
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• 2017

Today, modern people are exposed to various environmental pollutants such as harmful substances and stress, which can compromise health. Therefore, a healing culture that seeks to enjoy human life based on the healing of body and mind is attracting great attention. The purpose of this study is to develop environmentally friendly natural dyeing considering a healing concept with four elements: color, dye, material, and pattern. The research methods and scope are based on a theoretical review of healing and research on the literature of bedding related to natural dyes, national and international books, the Internet, etc., and naturally dyed bedding. This paper presents actual production research. The results of this study are as follows. First, the elements of color, dyeing, material and pattern were developed through the process of a bedding design development model that applies a healing concept and can be commercialized as a healing bedding product. Second, a healing color proposal was expressed in an intermediate color system of pink, ocher, lavender, and indigo colors for emotional stability, warmth, calmness, comfort and softness. Third, eco-friendly bedding using natural dyes with medicinal efficacy can obtain the healing effect of the natural treatment method, which can aid healthy sleep. Fourth, the pattern used in the bedclothes was a motif of Sarasa embroidery, flower embroidery, ribbon embroidery, and wave quilting motifs to provide psychological stability as a healing concept in the sleeping environment. The natural healing bedding with the healing concept proposed in this study has natural treatment that is beneficial to human health and the development of bedding with natural dyes will lead to an increase of demand for the sleeping environment.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제20권2호
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• pp.37-45
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• 2014

Purpose: Numerous researches about healthcare buildings have been performed however, they were mainly focused on convenience or healing condition for medical treatments. The hospitals consume energy and generate $CO_2$ as twice as the residential or commercial buildings do(Lim, et al., 2010a:154). The public regional hospitals are especially in serious conditions. They are more than 20 years old in average. Energy efficiency and environmental friendliness in the public regional hospitals are far behind ones in private sectors. Even though the ministry of health & welfare is supporting renovation of the builidngs and enhancement of the facilities every year, it is not integrated including sustainibility. In this study, we investigates current conditions of the regional public hospital in envrionment-friendly standpoint, especially focused on Chungcheong Province area Hospitals. Methods: we investigates current conditions of the regional public hospital in envrionment-friendly standpoint, especially focused on Chungcheong Province area Hospitals. The study was executed by qualitative and quantitative evaluations with site inspection, drawing analysis and interviews. Results: Through this study, we found that the Chungnam regional public hospitals can be environmentally improved by management plans and programs. Implications: Based on this analysis, Korean Green Building Certification for healthcare facilities will be developed in near future.

• 한국지반환경공학회 논문집
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• 제20권5호
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• pp.23-29
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• 2019

일반적으로 관매설공사는 관 등의 매설물을 시공하고 나머지 부분을 모래나 토사를 이용하여 되메우는 방식으로 진행된다. 그러나 매설물 주변의 다짐이 어렵거나 다짐효율이 떨어지는 등 다짐 시 많은 문제가 발생하고 있으며, 되메우기 공사 시 매설관의 변형과 파손을 유발하여 궁극적으로 도로함몰의 원인으로 발전하게 된다. 이러한 문제점을 해결하기 위한 방안 중 대표적으로 유동화토를 활용한 공법이 있으며, 최근 환경보호와 자원 재활용의 차원에서 모래와 공학적 성질이 유사한 석탄회를 활용한 유동화토에 관한 연구가 활발히 진행되고 있다. 석탄회 중 비회는 많은 연구가 진행되어 여러 방면으로 재활용이 이루어지는 반면, 저회는 대부분 재활용되지 못하고 회처리장에 매립됨에 따라 저회에 대한 재활용 요구가 증가되고 있다. 이에 본 연구는 친환경 고결제를 활용하여 환경적으로 유리하며 유동화토 기준에도 적합한 저회의 활용방안을 모색하기 위하여 친환경 고결제와 대표적인 현장발생 토사인 화강풍화토 및 저회, 비회 혼합토를 대상으로 유동특성, 강도변화 특성 등을 구명하고, 토양오염도 평가를 수행하여 저회를 활용한 유동성 복토재의 활용방안을 제시하였다.

• 한국도로학회논문집
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• 제17권3호
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• pp.49-58
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• 2015

PURPOSES : The use of environmentally friendly construction methods has been recently encouraged to reduce fuel consumption and the effects of global warming. For this purpose, the roller compacted concrete pavement (RCCP) construction method has been developed. RCCP is more environmentally friendly and economically efficient than general concrete by reducing the amount of CO2 generated through the application of a smaller amount of cement. RCCP has a number of advantages such as an easy construction method, low cost, high structural hydration performance, and aggregate interlocking. However, mix design standards and construction guidelines of RCCP are required for domestic application. In addition, a study on aggregate selection, which has an effect on the characteristics of RCCP, is necessary owing to a limited number of researches. Thus, the aggregate effect on the performance of RCCP in securing the required strength and workability was evaluated in consideration of domestic construction. METHODS : Sand and coarse aggregates of both 19mm and 13mm in maximum size were used in this study. Four types of aggregate gradations (s/a = 30%, 58%, and 70% for the sand and coarse aggregate of 19mm in maximum size, and s/a = 50% for a combination of the three types of aggregates) were set up to investigate the effects of the PCA band on the RCC characteristics. The conditions of s/a = 30% and 70% were evaluated to check the gradation effect outside of the recommended band. The conditions of s/a = 58% and 50% were used because they are the optimum combination of the two and three types of aggregates, respectively. RCCP gradation band was suggested gradation with a proper construction method of RCCP by synthetically comparing and analyzing the correlation of optimum water content, maximum dry density, and strength of requirements through its consistency and compaction test. RESULTS : The lower and upper limit lines are insufficient to secure a relatively strong development and workability compared to an aggregate gradation in the RCCP gradation band region. On the other hand, the line in the RCCP gradation band and the 0.45 power curve in the RCCP gradation band region were satisfactory, ensuring the required strength and workability. CONCLUSIONS : The suitable aggregate gradation on RCCP process should meet the RCCP gradation band area; however, fine particles passing through a #60 sieve do not need to be within the recommended gradation band because the influence of this region on such fine particles is small.

• 한국실내디자인학회논문집
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• 제22권2호
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• pp.140-148
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• 2013

The purpose of this study is to examine the current status of allergic diseases associated with the housing environment and the psychological attitude of residents towards relevant risk factors. This study surveyed 1,200 people. In the first round, 200 participants were questioned through direct survey methods, while 1,000 participants filled out an online survey in the second round. Selected study subjects consisted of allergic diseases known to be closely related to housing environment factors. With advice from medical experts, the analysis included the examination of the prevalence status regarding five types of allergy-related diseases-allergic conjunctivitis, allergic rhinitis, allergic dermatitis, asthma and headache-with the range of disease incidence set within the past ten years. The survey was conducted on all age groups except those nine years old and younger, and the findings are as follows. Allergic diseases were found to be more prevalent among women than men. Residents identified effective methods for the alleviation and treatment of allergic diseases as ventilation, use of environmentally-friendly finishing materials, maintenance of a clean living space through cleaning or washing, and sunlight exposure. Residents' understanding of allergic diseases varied depending on their experience with such diseases and residential characteristics.