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권혜옥 ( Hye Ok Kwon ),손희식 ( Hee Sik Son ),오주연 ( Joo Yeon Oh ),오정은 ( Jeong Eun Oh ),최성득 ( Sung Deuk Choi ) 한국환경분석학회 2013 환경분석과 독성보건 Vol.16 No.3
Ulsan, a representative industrial city in South Korea, has various sources of heavy metals. The upstream of the Taehwa River in Ulsan is used to supply drinking water, but heavy metal pollution in this area has not been studied yet. Therefore, in this study, we investigated the levels and patterns of heavy metals in the Taehwa River including the upstream. We also evaluated water quality using the water pollution index. We collected water samples at 18 sites of the Taehwa River in February and May 2011. Target heavy metals were cadmium,chromium, lead, nickel, and zinc, which were analyzed by an inductively coupled plasma mass spectrometer (ICP-MS). The concentration of heavy metals increased from the upstream to downstream, and the highest concentration was detected in the downstream nearby an industrial complex. The spatial distribution of heavy metals and water pollution indexes indicated that some urban sites and most industrial sites were artificially polluted, and non-point sources might play an important role in water pollution of the Taehwa River.
울산지역 주요 하천에서의 의약물질 및 개인관리용품 분포현황
권혜옥 ( Hye Ok Kwon ),심원진 ( Won Jin Sim ),김희영 ( Hee Young Kim ),오정은 ( Jeong Eun Oh ),최성득 ( Sung Deuk Choi ) 한국환경분석학회 2011 환경분석과 독성보건 Vol.14 No.3
Pharmaceuticals and personal care products (PPCPs) have been recognized as emerging contaminants in freshwater. In recent years, a lot of monitoring studies have been carried out, and wastewater treatment plants (WWTPs) were identified as a major source of PPCPs. As Ulsan is a metropolitan city and there are more than four rivers and six WWTPs, we conducted the first PPCP monitoring study to investigate the level, pattern, and geographical distribution of PPCPs in Ulsan. We collected 19 river water samples and analyzed 29 PPCPs using an LC/MS/MS. Among the target compounds, 26 compounds were detected from the samples; Antibiotics, analgesic and antipyretics, and beta-blockers were dominant compounds. As lincomycin and atenolol were frequently detected with the highest concentrations, they were listed as priority PPCPs in Ulsan. The highest total concentration of PPCPs was measured at a sampling site near the Eonyang WWTP, demonstrating that the WWTP is an important source of PPCPs. However, the overall spatial distribution of PPCPs suggests that non-point sources are also important in Ulsan.
권혜옥 ( Hye Ok Kwon ),이윤세 ( Yun Se Lee ),예진 ( Jin Ye ),손희식 ( Hee Sik Son ),김철수 ( Chul Su Kim ),최성득 ( Sung Deuk Choi ) 한국환경분석학회 2012 환경분석과 독성보건 Vol.15 No.1
Indoor air quality is an important environmental issue especially for multi-use buildings because many people can be readily exposed to air pollutants. In this study, we collected air samples at eight indoor sites in a new library completed in 2009. Our target compounds were hazardous air pollutants (HAPs) such as formaldehyde (HCHO), 48 volatile organic compounds (VOCs), and 16 US-EPA priority polycyclic aromatic hydrocarbons (PAHs). Their concentrations were 17~124 μg/m3 (mean: 37 μg/m3), 41~90 μg/m3 (mean: 59 μg/m3), and 19.5~94.7 ng/m3 (mean: 37.4 ng/m3), respectively. The highest concentrations of HCHO and VOCs were measured at an auditorium, while the highest concentration of PAHs was measured at a supercomputer room. The main source of HCHO and VOCs in the auditorium seemed to be new furniture, and that of PAHs in the supercomputer room might be circuit boards and chips in computers. The spatial distribution of HAPs in this library suggested that ventilation was a key factor affecting the levels of HAPs in the building.
폐수종말처리장으로 유입되는 특정수질유해물질에 대한 개별 업체의 적정 배출허용기준 설정
권혜옥 ( Hye-ok Kwon ),김성준 ( Seong-joon Kim ),최성득 ( Sung-deuk Choi ) 한국환경분석학회 2015 환경분석과 독성보건 Vol.18 No.3
In this study, a practical method to establish effluent limitations for priority water pollutants (PWPs) from industrial facilities was developed. As a case study, we collected influent and effluent wastewater samples from a terminal disposal plant for wastewater in Ulsan, Korea. Five water quality parameters and 17 PWPs were analyzed, and their discharge loads to the terminal disposal plant were calculated. In addition, the treatment efficiencies of PWPs were estimated by measuring concentrations and flow rates using the direct calculation method and the Monte Carlo simulation. If treatment efficiencies of PWPs are higher than 20%, the effluent limitations for industrial facilities can be maintained or relaxed in comparison with the Ministry of Environment (MOE) limitations for terminal disposal plants. Furthermore, a range of effluent limitations for the industrial facilities with various operating conditions of the terminal disposal plant (0-100%) were suggested. The method for establishing PWP limitations developed in this study can be applied to any terminal disposal plants.
유해대기오염물질 모니터링을 위한우선순위 산업단지와 측정지점의 체계적인 선정 방법
권혜옥 ( Hye Ok Kwon ),김영성 ( Young Sung Ghim ),김상균 ( Sang Kyun Kim ),홍지형 ( Ji Hyung Hong ),최성득 ( Sung Deuk Choi ) 한국환경분석학회 2014 환경분석과 독성보건 Vol.17 No.2
Industrial complexes are considered as a major source of hazardous air pollutants (HAPs) which include volatile organic compounds (VOCs), polycyclic aromatic hydrocarbons (PAHs), and heavy metals, etc. Therefore, the comprehensive monitoring and management of HAPs in the industrial complexes are required. In this study, the basic information of the industrial complexes (e.g., location, area, emission of air pollutants, meteorological conditions, and population) was used as input data for a geographic information system (GIS) software. On the basis of these GIS data, we proposed a systematic method for determining priority industrial complexes for the monitoring of HAPs. We identified 28 priority industrial complexes and classified them into four groups from level 1, whose HAPs should be continuously monitored, to level 4, whose HAPs do not have to be monitored. Furthermore, the case study of Ulsan was presented to demonstrate the selection procedure for sampling sites. The results of this study can be practically used to establish a long-term plan of the monitoring and management of HAPs.
과학적 재난원인조사기법을 활용한 전통시장 화재피해확산원인분석 및 개선방향
권혜옥(Kwon Hye-Ok),김소영(Kim Soyoung),이태욱(Lee Tae-Wook) 한국방재학회 2018 한국방재학회논문집 Vol.18 No.2
전통시장은 건물 간 인동거리가 높고 건물밀집도와 노후화로 인해 화재에 매우 취약한 조건을 갖추고 있다. 또한 합판 및 샌드위치 패널 등 화재에 취약한 재료 사용으로 인해 화염전파 또한 용이하다. 본 연구에서는 전통시장 화재사고 재발방지 및 피해확산을 막기 위한 개선사항을 제언하고자 2017년 1월 발생한 여수 수산시장 화재사고를 사례로 선정하고 재난원인과학조사를 수행하였다. 국립재난안전연구원의 재난원인분류체계를 기반으로 화재사고 원인을 분석한 결과, 노후화된 전선단락으로 인한 사고발생이라는 직접원인 이외, 간접원인 및 피해확대원인이 분석되었다. 분석된 원인을 바탕으로 세 가지 카테고리의 개선사항을 제언하였다. 이러한 제언사항들이 정책에 반영되고 개선된다면 동일한 원인에 의한 사고가 발생하거나 피해가 확대되는 것을 예방할 수 있을 것으로 기대한다. There are many kind of weakness for fire accident such as high density and deterioration of buildings and flammable construction materials in traditional market. Because of these weaknesses, flashover phenomena can be easily spread to other spaces, and then damage might be large. The objective of this study is to investigate the disaster cause in case of the fire accident in Yeo-Su traditional market using cause analysis method. The causal analysis tree based on the classification scheme (MEPS) of the disaster cause suggested by NDMI was used to investigate the cause of fire accident in Yeo-Su traditional market. The direct and indirect cause, cause of the expansion damage were classified, and then we suggested three improvement suggestion. We expected that they can prevent and protect from same or similar disaster if they will be apply to the government policy.
권혜옥(Hye Ok Kwon),김진만(Jin Man Kim),이식모(Suk Mo Lee) 한국해양환경·에너지학회 2007 한국해양환경공학회 학술대회논문집 Vol.2007 No.-
우리나라 연안역은 여러 가지 복합적인 원인들로 인해 해중림이 소멸되고 시멘트와 같은 석회질로 된 딱딱한 홍조류인 무절석회조류가 암반을 뒤덮는 갯녹음 현상이 진행되고 있다. 갯녹음 현상은 한번 진행이 되면 복원이 어렵고 시간 또한 오래 걸린다. 최근 갯녹음 해역의 원인과 대책에 대한 연구가 진행이 되고는 있으나 해조장복원을 위한 객관적 선택절차를 거친 체계적인 연구는 부족한 실정이다. 이에 본 연구에서는 갯녹음이 발생한 해역의 해조생산력의 향상과 어족자원을 회복시킬 수 있는 해조장 으로의 복원시 고려할 항목과 인자들을 체계적이고 구체적으로 나타낸 모듈을 작성하였다. Seaweed around Korea Coastline has disappeard after conbined reasons and becoming hard as cement with Coralline algae, called Whitening. Whitening is happen어 increasingly but there is insufficient objective solution to recover seaweed. In this study, objective factor were carried out to recover seaweed which can inhibit Whitening and increase primary production of seaweed for fishery production.
오주연 ( Joo Yeon Oh ),권혜옥 ( Hye Ok Kwon ),이윤세 ( Yun Se Lee ),박은정 ( Eun Jeong Park ),김철수 ( Chul Su Kim ),손희식 ( Hee Sik Son ),예진 ( Jin Ye ),최성득 ( Sung Deuk Choi ) 한국환경분석학회 2012 환경분석과 독성보건 Vol.15 No.2
In this study, wastewater sludge was collected at a chemical plant in Ulsan, Korea, and the effect of ultrasonic treatment on sludge reduction and heavy metal leaching was investigated. In lab-scale experiments, the amount of sludge decreased with increasing ultrasonic irradiation intensity (100~600 W) and time (0.5~30 min). A pilot-scale ultrasonic reactor made in this study showed the highest performance (i.e., 46.2% of sludge reduction) in a batch mode operation. These results demonstrated that the ultrasonic treatment was useful for the reduction of sludge. On the other hand, the levels of heavy metals (Cd, Pb, Cu, and Zn) in supernatants of the sludge samples after the ultrasonic treatment substantially increased, addressing the need for proper management of toxic chemicals after dehydration of sonicated sludge. The reason for the sludge reduction and heavy metal leaching after the ultrasonic treatment was the disintegration of sludge flocs and cell walls. Therefore, an advanced ultrasonic technology considering both sludge reduction and leaching of toxic chemicals should be developed for practical applications.