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수록정보
수록범위 : 1권1호(2000)~22권2호(2021) |수록논문 수 : 1,116
한국환경기술학회지
22권2호(2021년 04월) 수록논문
최근 권호 논문
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1철강제조시설에서 배출되는 백연의 유해성과 주변지역에 미치는 영향

저자 : 이승원 ( Seung-won Lee )

발행기관 : 한국환경기술학회 간행물 : 한국환경기술학회지 22권 2호 발행 연도 : 2021 페이지 : pp. 89-95 (7 pages)

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In this study, we examined the harmful substances of white smoke generated from steel manufacturing facilities and studied the influence of white smoke on the surrounding area using a gaussian model. As a results of analyzing white smoke, the concentration of TVOCs containing acetaldehyde 51.6 ㎍/㎥ was 829.3 ㎍/㎥. The TVOCs concentration of 823.9 ㎍/㎥ was lower than the indoor parking maintenance standard of 1,000 ㎍/㎥. However, the concentration was higher than the standard of 400 ㎍/㎥ for medical institution and nursery schools and the standard of 500 ㎍/㎥ for multiple facilities such as underground store. As a result of modeling, white smoke emitted from A steel spread to the southwest in the direction of mountain. As for the characteristics of the seasons, the same tendency is shown in spring and summer, but it was found that white smoke has a large area affected by the environment in spring. In autumn and winter, due to the influence of the northwesterly wind, the influence appeared mainly in the direction of G port wharf, which is south or southeast.

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2PUF PAS를 이용한 대기 중 PAHs의 농도 추정

저자 : 김태욱 ( Tae-wook Kim ) , 송재홍 ( Jae-hong Song ) , 천만영 ( Man-young Chun )

발행기관 : 한국환경기술학회 간행물 : 한국환경기술학회지 22권 2호 발행 연도 : 2021 페이지 : pp. 96-107 (12 pages)

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This study developed a method for an improved measurement of PAHs concentrations in the atmosphere using two PUF PAS and two low-volume air samplers (LVAS), and thereby measured and characterized the seasonal concentrations of PAHs in the atmosphere of Anseong area using PUF PAS. It was better to use correlation between the concentrations from LVAS and those from PUF PAS, whereby analysis errors were reduced, than to use sampling rates (㎥/day), in the procedure of determining PAHs concentrations in the atmosphere using PUF-PAS. The seasonal PAHs concentrations in the atmosphere were 7.77 ng/㎥ in winter, 3.72 ng/㎥ in spring, 2.86 ng/㎥ in fall and 1.78 ng/㎥ in summer, and peak concentrations of Pen, Flt, and BbF were shown. The seasonal toxic equivalency (TEQ) were 0.1625 ng-TEQ/㎥ in spring, 0.0826 ng-TEQ/㎥ in winter, 0.0499 ng-TEQ/㎥ in fall and 0.0481 ng-TEQ/㎥ in summer, the order of which was different from that of concentrations, and peak TEQs of Flt, BbF, BaP, and DahA were shown. Because PAHs are a toxic issue, it is considered better to write their TEQ than their concentration, just like PCDD/Fs. Comparing the results of this study with the PAHs concentrations measured by the Ministry of Environment in Anseong as this study in the same period, confirmed that collecting atmospheric samples in a short period using HVAS would be greatly affected by local pollution.

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3소음 자동측정망을 활용한 대구경 화포 사격소음의 식별과 분석

저자 : 김경범 ( Kyoung-beom Kim )

발행기관 : 한국환경기술학회 간행물 : 한국환경기술학회지 22권 2호 발행 연도 : 2021 페이지 : pp. 108-115 (8 pages)

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In this paper, the procedure is proposed to identify the firing noise from artillery only with the noise level measured by an automatic noise measuring system and the effects of distance, ground condition, wind, season on the propagation of the firing noise were analyzed. LZeq was measured for 24 months at 6 sites installed 260 m to 7.2 km away from the source. Using the impulsiveness of firing noise, it is possible to identify the firing noise by cross-correlation between the noise level at the site where the firing noise is to be identified and the noise level at the site where it is sufficiently close to the noise source so that firing or non-firing noise can be determined with noise level. As the distance increases, the distribution of noise level became more complex and the deviation increased significantly. Considering noise reduction due to an increase in distance, the noise level at the receiver sites containing the path over sea surface was relatively higher than over land. The effect of wind on the noise level was confirmed at one site, but in general the increase or decrease in noise level with wind could not be determined. Although the detailed manner in which the noise level is affected by the season could not be established, a seasonal variation was observed at each site. There was no difference in noise level by morning and afternoon hours.

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4매립깊이에 따른 폐기물매립시설 안정화 평가

저자 : 이승원 ( Seung-won Lee )

발행기관 : 한국환경기술학회 간행물 : 한국환경기술학회지 22권 2호 발행 연도 : 2021 페이지 : pp. 116-123 (8 pages)

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In this study, the stabilization of the waste landfill in the sanitary landfill currently in operation was evaluated according to the landfill depth. The results of property survey of landfill waste ratio of soil is the highest according to the landfill depth, vinyls from 23.6 %~37.5 %, 22.4 %~23.3 %, 15.2 %~19.3 % and 15.8 %~13.2 % for each landfill depth. The ratio of C according to the landfill depth was the highest at 35.53 %, the landfill period 3~5 years, landfill depth 15 m and 5 m at 5~10 years and 10~15 years, showing a ration of 26.21 % and 18.29 %. The CH4 concentration decreased depending on landfill period(3~5 years, 5~10 years, 10~15 years, more than 15 years), as investigated in 52.5 %, 38.3 %, 29.4 % and 20.1 %. Estimate the stabilization by landfill depth (5 m, 10 m and 15 m) according to organic matter and C/N ratio as a logarithmic function, about 40 years, 43.6 years and 36.6 years. Linear function was found to take 26 years, 26.6 years and 23.9 years.

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5하수처리수 재이용을 위한 수질 현황과 활용방안 연구

저자 : 전수인 ( Su-in Jeon ) , 문희 ( Hee Moon ) , 박보영 ( Bo-young Park ) , 허동화 ( Dong-hwa Heo ) , 박찬오 ( Chan-oh Park )

발행기관 : 한국환경기술학회 간행물 : 한국환경기술학회지 22권 2호 발행 연도 : 2021 페이지 : pp. 124-133 (10 pages)

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This study aimed to improve the reuse rate of reclaimed water by analyzing the water quality of inflow and discharge water and suggesting an reprocessing strategy for the reclaimed water from five sewage treatment plants in eastern Jeollanam-do. A total of 30 water quality parameters, including 16 general water quality and 14 heavy metal parameters, were analyzed following the water quality standards for reclaimed and discharged water. The results of the analysis confirmed that the reclaimed water from the Yeosu plant could be used for washing, waterhead and river maintenance water; the reclaimed water from Suncheon, Gwangyang Jungang and Gokseong for washing, waterhead, landscaping, and river maintenance; and the reclaimed water from Gwangyang for washing and waterhead. For the reclaimed water to be used for cleaning, toilet flushing, recreational use, or agricultural, an appropriate treatment method, such as chlorine disinfection, activated carbon adsorption, or reverse osmosis, needs to be selected to reprocess the reclaimed water after checking the water quality parameters. If the discharged water meets the water quality standards for reclaimed water, it can be reused or supplied immediately. Therefore, sewage treatment facilities should have a daily assessment of pH, turbidity, bound residual chlorine, odor, and color, weekly measurement of BOD, TN, TP, and total coliforms, and quarterly evaluation of chloride, electrical conductivity, and other heavy metals. These strategies will likely contribute significantly to increasing the reuse rate of reclaimed water.

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6폐 유기용제로부터 Methylene Chloride 회수를 위한 Dimethyl Sulfoxide 추출 용매를 이용한 증류공정 최적화 설계(Ⅰ) - 추출 증류 Column의 최적화 설계 -

저자 : 강성진 ( Sung-jin Kang ) , 정병길 ( Byung-gil Jung )

발행기관 : 한국환경기술학회 간행물 : 한국환경기술학회지 22권 2호 발행 연도 : 2021 페이지 : pp. 134-141 (8 pages)

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The purpose of this study is to recover at least 1,700 kg/hr of methylene chloride with a purity of 99.9 % or higher from waste organic solvents discharged after being used as a cleaning agent in semiconductor and display manufacturing processes, and the moisture content of the final porduct is less than 1 ppm by changing the variables such as the feed stage of raw matrial and DMSO, reflux ratio. Its final purpose is to design an optimal extractive distillation process system. Based on the analysis results, it turned out that the optimum feed stage for introducing raw materials(Waste organic solvent) into the extractive distillation column(T-01) is the 65th stage. As a result of analyzing the heat duty of re-boiler and the purity of MC, the MC recovery flow rate, the water concentration, etc. to select the optimum feed stage and the optimum inflow flow rate of DMSO, it turned out that the optimum feed stage of DMSO is the third stage and the optimum inflow flowr ate of DMSO is 1 ,2000 k g/hr. As a result of analyzing the purity of MC and the MC recovery flow rate according to the reflux ratio of the extractive distillation column(T-01), it was found that when the reflux ratio is 3.5, the purity of MC could be maintained 0.999 as Mass fraction and the MC recovery flow rate is maximum.

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7영농시기에 따른 영산강 지류의 수질 변화에 관한 연구

저자 : 백종훈 ( Jong-hun Baek ) , 심홍빈 ( Hongbin Shim ) , 정강영 ( Kang-young Jung ) , 이영재 ( Youngjea Lee ) , 나은혜 ( Eunhye Na ) , 하돈우 ( Don-woo Ha )

발행기관 : 한국환경기술학회 간행물 : 한국환경기술학회지 22권 2호 발행 연도 : 2021 페이지 : pp. 142-150 (9 pages)

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The water quality and flow rate measured every 8 days were evaluated for Yeongsan River basin tributary, the water quality forecasting sites of the Ministry of Environment. In this study, the characteristics of water quality and factors of change according to farming activities of Jiseokcheon4, Manbongcheon, and Hampyeongcheon3, the major tributaries of the Yeongsan River basin, were investigated through load continuity curve and statistical analysis. As a result, it was analyzed that BOD was less affected by the flow rate in the correlation and factor analysis, indicating that there was little inflow of organic matter into the river due to rainfall. It was analyzed that T-P flows into the river during rainfall that affects the flow rate during the farming season, but affects the small-scale rainfall during the non-farming season, which does not significantly affect the flow rate of the river. It is believed that T-P is caused by rainfall from rivers and fresh water from rice paddies caused by farming activities. Accordingly, for water quality management, it is necessary to identify the pollutant sources generated by farming activities and manage the outflow of pollutants by farming period.

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8가스터빈 DLN 연소기에서 발생되는 미연탄화수소와 일산화탄소 저감방안 연구

저자 : 정필식 ( Pil-sik Jung ) , 정진도 ( Jin-do Chung )

발행기관 : 한국환경기술학회 간행물 : 한국환경기술학회지 22권 2호 발행 연도 : 2021 페이지 : pp. 151-158 (8 pages)

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In this study, a 100MW class gas turbine DLN combustor, which is widely operated for the use of power generation, was tested to analyze variations of the concentration of emissions such as unburned hydrocarbon(UHC), carbon monoxide, and nitrogen oxide. Concentrations of emissions were measured through changing influencing factors at each load ; pilot fuel fraction and combustion air flow. The result showed that it was effective for the purpose of decreasing UHC, and carbon monoxide to increase pilot fuel fraction at no load and light load, whereas to decrease combustion air flow at higher load. It also indicated that pilot fuel fraction had a great proportional effect on nitrogen oxide emission concentration, but the combustion air flow had an inversely proportional relationship with it.

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9미세먼지 전구체(SOx) 생성에 미치는 유동층 연소로의 공정변수 영향

저자 : 최석환 ( Seok-hwan Choi ) , 윤형선 ( Hyung-sun Yoon ) , 서성규 ( Seong-gyu Seo )

발행기관 : 한국환경기술학회 간행물 : 한국환경기술학회지 22권 2호 발행 연도 : 2021 페이지 : pp. 159-165 (7 pages)

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In this study, SOx conversion rate of sulfur content in mixed anthracite was investigated, and factors affecting SOx generation due to each process parameters were analyzed. For this, first, the items necessary for process improvement were analyzed. Next, the optimum Ca/S molar ratio and the temperature in the furnace were derived. The effect of high-powder limestone on the desulfurization effect was tested. In addition, changes in the desulfurization efficiency according to the inorganic components in the coal were also tested. As a result of improving the optimum Ca/S molar ratio and the furnace temperature, the desulfurization efficiency increased from 83 % to 87 %. In the experiment using high powder limestone, the desulfurization efficiency increased from 87 % to 95.5 %. It is predicted that the SOx emissions by about 72.7 % will be reduced . It was found that the improvement effect converted to ultrafine dust emission was 64.6 %, which decreased 394 tons/year(2 units).

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10바이오매스 저장고 내부 비산먼지 포집용 PTFE 멤브레인 연구

저자 : 임경택 ( Kyung-taek Lim ) , 서명조 ( Myoung-jo Seo ) , 정진도 ( Jin-do Chung )

발행기관 : 한국환경기술학회 간행물 : 한국환경기술학회지 22권 2호 발행 연도 : 2021 페이지 : pp. 166-172 (7 pages)

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In the fuel shed of a biomass SRF power plant generates a large amount of high concentration of scattered dust, which can lead to health problems, safety and facility accidents for field workers. This study was conducted to develop a collection technology suitable for the characteristics of biomass scattering dust. A PTFE membrane with a pore size of 0.05 to 10 ㎛ was developed and laminated on a felt to make a filter bag. PTFE membrane filter bags are used in dust collection systems that require durability, high temperature and chemical resistance to efficiently remove fine dust and maintain high-efficiency performance for a long time. The PTFE membrane filter bag is a surface filtration method that prevents fine dust from penetrating the inside of the filter material, thus maintaining filtration efficiency and a long service life. It has efficiency of collecting more than 99.94 % needle-shaped scattering dust.

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1연안해역에서 석유오염물질의 세균학적 분해에 관한 연구

(2006)홍길동 외 1명심리학41회 피인용

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2미국의 비트코인 규제

(2006)홍길동심리학41회 피인용

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2미국의 비트코인 규제

(2006)홍길동41회 피인용

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