• 한국환경과학회지
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• 제30권3호
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• pp.219-234
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• 2021

Industrial emissions, mainly from industrial complexes, are important sources of ambient Volatile Organic Compounds (VOCs). Identification of the significant VOC sources from industrial complexes has practical significance for emission reduction. VOC samples were collected from July 2019 to June 2020. A Positive Matrix Factorization (PMF) receptor model was used to evaluate the VOC sources in the area. Four sources were identified by PMF analysis, including coating-1, coating-2, printing, and vehicle exhaust. The coating-1 source was revealed to have the highest contribution (41.5%), followed by coating-2 (23.9%), printing (23.1%), and vehicle exhaust (11.6%). The source showing the highest contribution was coating emissions, originating from the northwest to southwest of the sample site. It also relates to facilities that produce auto parts. The major components of VOC emissions from the coating facilities were toluene, m,p-xylene, ethylbenzene, o-xylene, and butyl acetate. Industrial emissions should be the top priority to meet the relevant control criteria, followed by vehicular emissions. This study provides a strategy for VOC source apportionment from an industrial complex, which is helpful in the development of targeted control strategies.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2013년도 제47차 동계학술대회논문집 21권1호
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• pp.89-90
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• 2013

지능형 교통 시스템(ITS:Intelligent Transp-ortation Systems)은 점점 가속화되고 있는 정보화 사회에 알맞은 신속, 안전, 쾌적한 차세대 교통체계를 구현하는 데 목적을 두고 있다. 이의 일환으로 경기도 광주시 도시지역 광역교통정보 기반확충사업은 광주시 전역을 대상으로 '11년 6월 착수하였다. '12년 4월 SK C&C 컨소시엄이 성공적으로 완료하였다. 광주시는 본 사업을 통해 24시간 교통흐름 및 돌발 상황에 효과적인 대응 수단을 확보하였다. 그리고 실시간 교통정보를 제공함으로써 교통량 분산 등의 효과를 가져왔다.

• 한국환경보건학회지
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• 제50권2호
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• pp.93-101
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• 2024

Background: As pollutants caused by non-point sources flow into rivers, river water quality monitoring for fecal pollution is becoming increasingly important. Objectives: This study was conducted to investigate the distribution of microbial communities in the Yeongsangang River water system and sewage treatment plants in Gwangju and to evaluate their antibiotic resistance. Methods: In the experiment, samples were distributed to five selective media at each point and then cultured for 18 to 24 hours. When bacteria were observed, they were sub-cultured by size and shape and identified using MALDI-TOF MS equipment. When identification was completed, 17 types of antibiotic susceptibility tests were performed using VITEK II equipment, focusing on gram-negative dominant species among the identified strains. Results: During the study period, a total of 266 strains were isolated from 39 samples. Gram-positive bacteria were 37 strains in four genera, or 13.9% of the total, and Gram-negative bacteria were 229 strains in 23 genera, or 86.1% of the total. Antibiotic susceptibility testing of 23 strains, the major dominant species, showed that one strain (4.3%) was resistant to only one antibiotic, and two strains (8.7%) were 100% susceptible to the 17 antibiotics tested. The other 20 strains (87.0%) were multidrug resistant bacteria resistant to two or more antibiotics. There were various types of multidrug resistance. Among them, penicillin and cephalosporin series showed the highest resistance. Conclusions: Based on the results of this study, it was found that the bacterial community structure changed according to regional and environmental factors, and it was judged that continuous research such as genetic analysis of antibiotic-resistant bacteria present in natural rivers is necessary.

• 한국환경보건학회지
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• 제50권2호
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• pp.146-156
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• 2024

Background: Children who use playground facilities are exposed to potential risks due to the high concentration of heavy metals contained in the finishing materials of facilities in children's playgrounds. Objectives: The purpose of this study was to investigate the concentration of heavy metals in the finishing materials of outdoor children's playgrounds where harmful heavy metals exist in Gwangju and to conduct human risk assessment for children and adults by age to find the risks and limitations. Methods: The bottom and top layers of double-painted paint were peeled off and collected together from the finishing materials of children's play facilities such as slides, swings, and seesaws in 147 children's parks in Gwangju. Heavy metals were analyzed using ICP-OES, etc., and human risk assessment was performed using the concentrations of heavy metals. Results: Based on 1.0E-04, which requires legal regulation, CTE was found to pose a carcinogenic risk for preschool children and no carcinogenic risk for the rest of the age groups. However, RME showed that both men and women of all ages had a carcinogenic risk. For reference, when the carcinogenic risk was based on 1.0E-06, CTE was found to pose a carcinogenic risk from infants to elementary school students, and RME was found to have a carcinogenic risk in all age groups. It was judged that there is a non-carcinogenic risk if the non-carcinogenic risk exceeds 1 based on the hazard index (HI) 1. In CTE, there was no non-carcinogenic risk, and RME for preschooler males (1.49E+00) and females (1.56E+00) were found to have non-carcinogenic risk. Conclusions: This study was meaningful in that it examines the differences in the current management of heavy metals concentration standards and potential carcinogenic and non-carcinogenic risks to the human body and discusses the relationship between heavy metals and human health effects.

• 한국환경과학회지
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• 제31권5호
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• pp.447-456
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• 2022

This study was conducted to propose a way to increase the accuracy and precision of 𝛽-ray measurement equipment. Statistical processing results of equivalent evaluation data from 2016 to 2021 confirmed that the concentration of micro dust measured by 𝛽-ray measurement equipment was higher than that of micro dust sampler. According to quarterly data, it was confirmed that the data from the third quarter (July to September) showed a different trend from other periods, which is assumed to be due to weather conditions. This study indicates that automatic micro-dust measurement equipment evaluation at air pollution measuring stations during the third quarter should be excluded. The evaluation cycle should be changed from once every two years to quarterly. In addition, when the criterion for determining equivalence evaluation falls within the range of the slope and intercept values of the existing trend line, it is necessary to evaluate the R² value together and reduce the slope from 0.9-1.1 to 0.9-1.0.

• 월간 기계설비
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• 통권255호
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• pp.56-58
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• 2011

제8대 시 도회장이 새롭게 구성됨에 따라 전국 시 도회는 시 도회장을 중심으로 본격적인 활동에 들어갔다. 본지는 향후 3년간 시 도회를 이끌어갈 전국 시 도회장으로부터 사업계획을 들어 보는 자리를 마련했다. 이번호에는 이연풍 광주 전남도회 회장을 만나보았다.

• 광학세계
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• 제11권5호통권63호
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• pp.58-64
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• 1999

근래 들어 광주광역시를 중심으로 광주지역 광산업 육성을 위한 움직임이 가시화되고 있는 가운데 각계에서 광산업에 대한 관심이 부쩍 높아지고 있다. 이에 7월 1일 광주광역시 주최로 열린 '광산업 현황과 발전방향 세미나'에 본 협회 홍계인 전무이사가 광산업계 대표로 참여해서 발표한 내용을 소개한다. 자료는 광산업의 개요부터 현황, 발전대책을 담고 있다.

• 한국식품위생안전성학회지
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• 제34권2호
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• pp.205-211
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• 2019

2017년 10월부터 2018년 9월까지 광주광역시 시내 슈퍼, 대형마트 및 재래시장에서 구입한 율무, 수수, 기장, 조, 백미, 보리 등 곡류 75건과 볶은 율무, 보리, 옥수수 등 곡류가공품 52건 총 127건을 대상으로 곰팡이독소 함량검사를 실시하였다. 검사한 곰팡이독소는 아플라톡신($B_1$, $B_2$, $G_1$, $G_2$,), 푸모니신($B_1,\;B_2$), 오크라톡신 A, 제랄레논이었다. 127건의 시료 중 38건에서 곰팡이독소가 검출되어 29.9%의 검출률을 나타내었다. 127건의 시료 중 35건에서 푸모니신($B_1+B_2$)은 $4.8{\sim}738.5{\mu}g/kg$, 제랄레논은 20건에서 $8.4{\sim}507.6{\mu}g/kg$ 범위에서 검출되었다. 검사한 곡류와 곡류 가공품 중에서 가장 오염도가 높은 곰팡이독소는 푸모니신과 제랄레논이었고 이들 곰팡이가 중복 검출된 검체는 17건으로 독소가 검출된 38건 중에서 44.7%를 차지하였다. 곰팡이독소 일일추정섭취량(EDI)과 잠정최대일일섭취허용량(PMTDI)으로부터 위해도를 산출하였다. 위해도는 0.0019~1.9526%로 나타나 이번에 조사한 곡류와 곡류가공품은 곰팡이독소 측면에서는 안전한 수준으로 판단되었다.

• 건축사
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• 5호통권146호
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• pp.73-82
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• 1981

• 수도
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• 통권7호
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• pp.21-26
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• 1976