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수록정보
수록범위 : 1권1호(2000)~20권4호(2019) |수록논문 수 : 1,005
한국환경기술학회지
20권4호(2019년 08월) 수록논문
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KCI후보

1EM 담체를 충전한 하천 모의실험의 수처리 효율 산정

저자 : 배수현 ( Su-hyun Bae ) , 유찬서 ( Chan-seo You ) , 김영규 ( Young-kyu Kim ) , 정정조 ( Cheong-jo Cheong ) , 라덕관 ( Deog-gwan Ra )

발행기관 : 한국환경기술학회 간행물 : 한국환경기술학회지 20권 4호 발행 연도 : 2019 페이지 : pp. 213-221 (9 pages)

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Experiments were carried out to investigate the effect of EM application on stream purification in simulated river filled with EM media. The river bed soil of artificial stream had made with 11.9 % of gravel, 74.2 % of sand, 8.7 % of silt and 5.2 % of clay. And their the sorting was 2.17, the skewness was 0.47, and the kurtosis was 2.05. Algae, black fungus, green algae, and red tubificid were shown with the macroscopic observation. From a result of water quality analysis for effluents, the temperature was 19.4 ± 6 ℃, pH was 6.3 ~ 8.5, DO was 6.3 ~ 8.5 mg/L, EC was 0.14 ~ 0.25 μs/cm, ORP was 94~158 mV and turbidity was in the ranged of 1.0 ~ 3.8 NTU. The simultaneous packing of EM media and river bed soil(RS-2), the removal efficiencies of COD, NH4 +-N and PO4 3--P were accomplished to 80.0 %, 95.3 %, 67.1 % at 7 L/min water cycling flow, 80.5 %, 98.1 %, 88.5 %, at 13 L/min flow, 83.3 %, 98.2 %, 90.4 % at 40 L/min flow, respectively.

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2물소리와 분수 연출음의 물리적 특성에 관한 연구

저자 : 신용규 ( Yong-gyu Shin ) , 국찬 ( Chan Kook )

발행기관 : 한국환경기술학회 간행물 : 한국환경기술학회지 20권 4호 발행 연도 : 2019 페이지 : pp. 222-235 (14 pages)

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In this study, the sound of water and the physical characteristics of the reproducing sound of the fountain were identified and presented as basic data in the design of the fountain. First, the results of the study show that the physical index that can be described by dividing the space where water sounds are produced (W), the space where water sounds are not produced at all (N), and the space where water sounds and human behavior sounds coexist (C) was identified by StdDev, L90, NbEm, EmT, REm, G, and Sharpness. Second, the distinction between the number of nozzles in fountain and the water pressure could explain the sound quality (Loudness, Unbiased Annoyance, Articulation Index(NHV), Roughness), peak (REm, NbEm, StdDev) and size (Leq, L90) according to the change in the number of nozzles, and the clearness of the sound source (G, Sharpness) according to the change in water pressure, etc. Third, comparing the physical characteristics among the sound of water produced in space and the sound of the water directed by fountain resulted in consistent changes in StdDev, NbEm, and REm depending on the increase and decrease in the number of nozzles and G showed a tendency to change consistently with increasing or decreasing water pressure. So it is judged that the number of nozzles and the water pressure will allow the adjustment of a specific index. If the type of nozzle is further diversified and the hearing test and brain wave evaluation are carried out for field application, it will be possible to develop and utilize it as an indicator for the design of the fountain production according to location and situation.

KCI후보

3소성 굴 패각을 이용한 인 제거 및 반응결정물의 특성

저자 : 양정하 ( Jeong-ha Yang ) , 류경원 ( Kyong-won Ryu ) , 김진호 ( Jin-ho Kim ) , 이영신 ( Young-shin Lee ) , 고재철 ( Jae-churl Ko )

발행기관 : 한국환경기술학회 간행물 : 한국환경기술학회지 20권 4호 발행 연도 : 2019 페이지 : pp. 236-242 (7 pages)

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In this study, the crystallization characteristics of hydroxyl-apatite (HAp) in phosphorus removal by calcined oyster shell powder was invested. Natural oyster shell powder (ROSP) and oyster shell powder calcined at 900 ℃ (COSP) were used in the experiment, and phosphorus removal efficiency, pH variation, FT-IR and XRD of the product were analyzed. The phosphorus removal efficiency of the ROSP and COSP appeared at 8.9 % and 85.0 % within about 1 minute respectively, and there was no significant change in the removal efficiency for 24 hours. Therefore, it was confirmed that most of the reaction was initially completed. The initial pH of the artificial sample was 6.1, and the pH after the addition of the ROSP and COSP increased rapidly to 7.3 and 11.6, respectively, and maintained steadily for 24 hours. In the FT-IR and XRD analysis of the COSP reaction crystals, intermediate such as di-calcium phosphate di-hydrate (DCPD), and HAp were detected together. From the results, it is judged that calcium hydroxide eluted from the COSP reacts with the phosphorus within a short time to produce intermediate and grows into the HAp crystal over time. Therefore, it is considered that the phosphorus can be removed by the production of intermediate materials in a removal process with a short reaction time.

KCI후보

4해안폐기물의 고형연료 성형시험에 관한 연구

저자 : 김도일 ( Do-il Kim ) , 김도용 ( Do-yong Kim )

발행기관 : 한국환경기술학회 간행물 : 한국환경기술학회지 20권 4호 발행 연도 : 2019 페이지 : pp. 243-248 (6 pages)

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In this study, the pelletizing tests were conducted for solid refuse fuel, using the coastal wastes in islands. The twin screw pelletizer of extruder type was designed and used in this study. In the cases of polyethylene nets and buoys, the pelletizing tests were well conducted in general, and also the pellets as solid refuse fuel presented the maintenance form of almost-uniform diameter and smooth surface. However, it was hard to pelletize for woods(bamboo), and the pellets for nylon nets were fragile. The pelletizing test for mixed sample was well conducted without some additional binders, because the polyethylene and coating(ethylene vinyl acetate) materials which have relatively low melting temperature played a role as pelletizing binders by nozzle heating.

KCI후보

5승용차요일제 시행에 따른 경제·환경적 효과 분석

저자 : 유희주 ( Hui-ju Yu ) , 이재근 ( Jaekune Lee ) , 기호영 ( Hoyoung Kee ) , 이정범 ( Jung-beom Lee )

발행기관 : 한국환경기술학회 간행물 : 한국환경기술학회지 20권 4호 발행 연도 : 2019 페이지 : pp. 249-253 (5 pages)

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This study analyzed the environmental and economic effects of vehicle mileage program on the reduction of greenhouse gas emissions using the data collected for one year in 2018. The analysis was carried out in three scenarios with the anticipated effect of car mileage program, the introduction effect of car mileage program, and the actual effect of car mileage program. Using 34,911 units of vehicle mileage program, we analyzed the amount of greenhouse gas (GHG) reduction and its benefits before and after car mileage program. As a result, the GHG reduction effect on the anticipated effect of car mileage program was 12,650 tons and the benefit was estimated to be 1,897.5 million won. In addition, he actual effect of car mileage program showed 27,788 tons of GHG reduction effect and 4,168.2 million won in benefits. The effect of the introduction effect of car mileage program, excluding vehicles with less than 3 operating results, was 10,697 tons of GHG reduction, and the benefit was 1,604.55 million won. Although the GHG reduction effect of vehicle mileage program was shown to be larger than the original expected value, the effect of reducing the GHG was less effective than the expected effect when only the subject with substantial subscription effect was considered. Therefore, it is necessary to increase the number of participants in order to increase the practical effect of the vehicle mileage program, and it is necessary to strive for reduction of GHG as well as traffic demand management in parallel with new policies.

KCI후보

6호소 내 퇴적토질의 수질오염물질 항목과 조류증식 인자인 Chl-a와의 상관관계 분석

저자 : 이현주 ( Hyun-joo Lee )

발행기관 : 한국환경기술학회 간행물 : 한국환경기술학회지 20권 4호 발행 연도 : 2019 페이지 : pp. 254-260 (7 pages)

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The purpose of this study is to measure and evaluate the water quality and sedimentary soil at each point by coordinating the five points indicated on the map of the G lake located in Y city of Gyeonggi-do to investigate the effect of sedimentation on lake water quality and algal growth to investigate the effect. 27 water pollutant items in sediments were measured and Chl-a and phytoplankton were also surveyed. The correlation between the concentration of T-P and the concentration of Chl-a in the sediment soils was 0.183 for the first survey and 0.199 for the second survey which was similar to the lower range. In particular, the correlation analysis between water quality items COD, T-N and T-P, which are related to the growth of phytoplankton Chl-a. As a result of analysis of correlation between the water pollution items and the algal growth the effect of sedimentary soil on the water quality at each Y1~ Y5 survey site was not significant. The relationship between COD, T-N, T-P and sedimentary soil was in order of T-N(R2≤0.89), COD(R2≤0.69) and T-P(R2≤0.51).

KCI후보

7산업단지 생산 품목 유형에 따른 비점오염원 유출특성 분석

저자 : 박승도 ( Seung-do Park ) , 이원호 ( Won-ho Lee ) , 한양수 ( Yang-su Han )

발행기관 : 한국환경기술학회 간행물 : 한국환경기술학회지 20권 4호 발행 연도 : 2019 페이지 : pp. 261-269 (9 pages)

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The purpose of this study is to establish treatment direction of non - point pollutant source in production item type industrial complex by analyzing treatment efficiency and characteristics according to characteristics of industrial complex during non - point pollution source treatment. As a result, the treatment efficiency of the field suspended solid(SS) material producing food and polyvinyl chloride(PVC) type is more than 90 %, and the treatment efficiency is less than 80 % in the remaining polyvinyl chloride(PVC) production, metal production, and chemical manufacturing production area. It is considered that the efficiency of treatment of suspended solids is low due to low industrial pollution of influent water. It is considered that the efficiency of treatment of suspended solids is low due to low industrial pollution of influent water. The efficiency of biochemical oxygen demand(BOD) treatment seems to be relatively high in an industrial complex area that deals with an inorganic component rather than an area that deals with an organic substance or a chemical substance, and it is confirmed that a place using a high specific gravity material such as a metal has a treatment efficiency of 90 % or more There is a number. The treatment efficiency of total nitrogen(T-N) showed more than 50 % efficiency in most areas, but the treatment efficiency of food producing area was 2.4 %. The results of this experiment show that the method of water quality improvement should be applied differently according to the product production characteristics of each industrial complex.

KCI후보

8트러스모델을 사용한 철근콘크리트 구조물의 접합부 설치환경에 따른 우각부 연구

저자 : 정제평 ( Je-pyong Jeong ) , 장승명 ( Seung-myeong Jang )

발행기관 : 한국환경기술학회 간행물 : 한국환경기술학회지 20권 4호 발행 연도 : 2019 페이지 : pp. 270-276 (7 pages)

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The purpose of this study is to investigate the amount of rebar reinforcement at corner joints in reinforced concrete structures. As the use of reinforced concrete increases, the use of various types of joints is increasing. Since reinforced concrete corner joints determines the structural performance, research on rebar contents is very important. The current standard design calculation formula of rebar amount is not influenced by geometric shape of corner joint and rigidity ratio of steel. The equations of current standard was a translation of Japanese highway design standards and is different from the US ACI regulations. This study presents a more reasonable design criteria by analyzing the stress distribution through a simple truss model. The effective stiffening efficiency of the stiffener and flexural reinforcement of the corner joint of the box structure was evaluated by comparing with the FEM analysis. As a result of the analysis, it is structurally advantageous to install the hunch, and it is considered that the current design standard which regards the contribution of the rebar as 50 % is not reasonable.

KCI후보

9다양한 액상 및 고상 바인더를 이용한 고함철 단광 특성

저자 : 임승주 ( Seung-ju Lim ) , 윤형선 ( Hyung-sun Yoon ) , 서성규 ( Seong-gyu Seo )

발행기관 : 한국환경기술학회 간행물 : 한국환경기술학회지 20권 4호 발행 연도 : 2019 페이지 : pp. 277-283 (7 pages)

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In this study, we have investigated the characteristics of high steel content briquettes using various binders(liquid and solid powder) and steel by-products(SS, SCS, SLD, BSD). The viscosity of the liquid binder was found to be 4,321 cp in L1. The average particle size showed the largest 171 μm in S5 and about 40 μm in S2 and S3. The SEM-EDS analysis of solid power binder shows mostly rectangular images. The compressive strength of high steel briquettes was 491 kgf/cm2 with the highest HSL1 using liquid binders and 120 kgf/cm2 with the highest HSS4 using solid powder binders. The compressive strength of high content steel briquettes in the order of HSL1 > HSL3 > HSS4 > HSS1 > HSS3 > HSS5 > HSL2 > HSS2. It showed higher compressive strength in liquid binders, and it would be better to use liquid binder L1 as a base when manufacturing high steel briquettes in the future.

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1연안해역에서 석유오염물질의 세균학적 분해에 관한 연구

(2006)홍길동 외 1명심리학41회 피인용

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(2006)홍길동41회 피인용

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