생활폐기물 소각재로부터 미세플라스틱의 분리·추출

이가영 ( Gayeong Lee ),김나원 ( Nawon Kim ),김용진 ( Yong-jin Kim ) 한국폐기물자원순환학회 2023 한국폐기물자원순환학회지 Vol.40 No.1

The amounts of waste plastics continue to increase rapidly each year. Recycling, incineration, and landfilling are the main treatment and disposal processes of waste plastics. Indeed, although incineration has been used to decompose and remove plastic products, it is considered one of the main sources of microplastics (MPs). In recent years, various methods for extracting MPs from environmental media have been proposed by researchers. However, there is still no standardized method for the extraction of MPs. In this study, therefore, in order to efficiently extract MPs from incineration ash (i.e. bottom and fly ashes), separation solution, stirring method, and number of extraction were investigated. Except for the saturated NaCl saturated, good recovery rates were observed in the separation experiments with Oil + 5 g-NaCl/L and ZnCl₂ solutions, ranging from 63 to 80%. In addition, a good recovery rate was observed when using a magnetic stirrer, except for experiments with the ZnCl₂ solution. However, although the extraction was carried out three times in this study, MPs were still detectable, suggesting incomplete extraction of MPs. The obtained recovery rates were not higher than those reported in previous related studies, which might be due to the differences in the samples and the characteristics of MPs with different densities. During the separation process of supernatants, it is necessary to pay attention to the handling process of containers in contact with the samples, as MPs tend to stick to the container walls. Therefore, further related studies are required to develop effective methods for extracting MPs from incinerator ashes.

첨단안전자동차 안전성 평가기술 개발 연구(2단계)

이은덕(EunDok Lee),이가영(GaYeong Lee),유영곤(YoungGon Yu),강병도(JaeKon Shin),신재곤(ByungDo Kang),이재완(JaeWan Lee) 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11

Like many industrialized countries, the Republic of Korea (ROK) has implemented policy and research aimed at reducing the number of casualties caused by traffic accidents. For example, ROK launched the project titled “Reduce traffic casualties by half in 10 years” in 2008, Sweden introduced the Vision Zero Policy in the late 1990s, and other European Union members have launched similar projects aimed at reducing traffic accident fatalities by between 30 to 50 percent. To reduce the number of casualties from road accidents requires improvements to vehicles, road and traffic managements systems. To expedite this process Intelligent Transport System has been adapted and implemented to the vehicles and road systems. Vehicles with advanced safety features will be expected to reduce or prevent accidents which drivers cannot not respond to or perceive. To date, there has been insignificant research into the effective performance of vehicles with advanced safety features. The lack of assessment procedures has impeded the public acceptance of vehicles with advanced safety features. The Development of Assessment Technologies for Advanced Safety Vehicles has been introduced for the promotion of advanced safety vehicles. The project involves the development of assessment technologies for advanced safety vehicles. This paper shows the development of assessment methods for passive and active safety technologies.

메타버스 시대에 따른 가상현실 플랫폼 UX/UI 분석

이재인(Jaein Lee),김수연(Suyeon Kim),이가영(Gayeong Lee),임영재(Youngjae Im) 대한인간공학회 2023 대한인간공학회 학술대회논문집 Vol.2023 No.5

대학교수의 진로지도 역량 강화를 위한 정책 지원방안 요구분석

이민욱(Minwook Lee),장현진(Hyun-jin Jang),김대영(Dae-young Kim),이가영(Gayeong Lee) 한국진로교육학회 2020 진로교육연구 Vol.33 No.2

본 연구의 목적은 대학교수의 진로지도 역량을 강화하기 위한 정책 지원방안을 도출한 후, 도출한 지원방안의 필요수준과 현재수준을 조사하여 우선적으로 지원해야할 지원방안이 무엇인지 알아보는 것에 있다. 이를 위해 전문가 26인을 대상으로 조사를 실시하여 정책 지원방안 목록을 도출하고, 전국 4년제 대학교수 301인에게 도출된 지원방안의 현재수준과 필요 수준을 조사하여 요구분석을 실시하였다. 연구 결과는 다음과 같다. 첫째, 국가수준의 지원방안 요구분석 결과, ‘국가 수준의 진로지도, 취․창업 관련 정보 제공 시스템 구축’, ‘국가 수준의 학생 진로지도 방법, 취업역량 제고 방법 등 자료 개발 및 보급’, ‘산학연계 전공 교육 강화를 위한 외부 전문 인력 풀 구축 및 제공’, ‘학생 진로역량 강화를 위한 재정지원 사업운영’, ‘현장실습 및 산학연계 확대를 위한 정책적 지원 확대’, ‘대학 내 취업담당조직, 고용지원 센터, 창업지원센터 등 관계자 협의회 운영 지원을 통한 협력적 네트워크 구축’의 6개 방안이 최우선순위로 도출되었다. 둘째, 대학수준의 지원방안 요구분석 결과, ‘교수 진로지도 활성화를 위한 활동비, 교육훈련비 등 제공’과 ‘진로지도 실적을 연구, 강의 및 봉사 시수 대체 인정 또는 업무 시간 인정’의 2개 방안이 최우선순위로 도출되었다. 이러한 연구 결과를 토대로 대학교수의 진로지도 활성화 및 역량 제고를 위한 후속 연구를 제언하였다. The purpose of this study was to identify support plans to enhance career guidance competency of university faculty, and then examine the required and current levels of the derived support plans to find out which plan should be supported first. To achieve this goal, we conducted an open questionnaire survey for 26 experts to derive a list of support plans, and then surveyed the current level and required level of the support plans for 301 4-year university professors nationwide. The results of this study are as follows. First, as a result of conducting needs analysis for support plans at national level, ‘Establishment of information system for career guidance, job, and start-up at national level’, ‘Developing and disseminating materials at national level such as how to provide career guidance to students and how to improve their employment competency’, ‘Building and providing a pool of external experts to strengthen education in industry-academia cooperation major’, ‘Operation of financial support projects to enhance students" career competency’, ‘Expanding policy support for field training and industry-academia cooperation expansion’, ‘Establishing a collaborative network through support for the relevant councils such as the students’ employment department, employment support center, and start-up support center’ were derived as the top priority support plans. Second, as a result of conducting needs analysis for support plans at university level, ‘Providing activity and education & training expenses for facilitating career guidance of professors’ and ‘Recognition of career guidance performance as research, lecture and volunteer hours, or work hours’ were derived as the top priority support plans. Based on these results, we suggested follow-up studies to promote career guidance of university faculty and enhance their competency.

도시고형폐기물 매립지 침출수에서 미세플라스틱의 분리·추출 방법에 관한 고찰

김나원 ( Nawon Kim ),이가영 ( Gayeong Lee ),김용진 ( Yong-jin Kim ) 한국폐기물자원순환학회 2023 한국폐기물자원순환학회지 Vol.40 No.4

Plastic waste is a widespread byproduct of industrial development. Once released into the environment, it degrades into microplastics, due to physical breakdown, photodegradation, chemical deposition, and biological degradation. These materials are found in various ecosystems, including rivers, lakes, beaches, estuaries, sediments, and waste incineration residues. Waste landfills are the main storage of plastic waste, and about 79% of the wasted plastics are accumulated alongside landfills and the natural environment. In addition, microplastics formed within landfills are mixed with landfill leachate and evacuated for a variety of factors. Various pretreatment methods have been proposed to separate and extract microplastics from landfill leachate. However, researchers’ methodologies significantly differ in the type of reagent for the density solution and the filter paper; consequently, there is no standardized method. Hence, this study aims to compare and classify various techniques suggested in previous studies that separated and extracted microplastics from leachate to find efficient methods that can be applied in the future. Furthermore, analytical items showing a correlation with the concentration of microplastics among environmental media were also considered and presented.

수산부산물 중 이물질 함유량 시험방법의 제안

김용진 ( Kim Yong-jin ),서동천 ( Seo Dong-cheon ),이가영 ( Lee Gayeong ),김나원 ( Kim Nawon ),강철호 ( Kang Chul-ho ),김백범 ( Kim Baek Beom ),이대규 ( Lee Dae Gyu ),강옥비 ( Kang Ok Bi ) 한국폐기물자원순환학회 2023 한국폐기물자원순환학회 추계학술발표논문집 Vol.2023 No.0