• The Korean Journal of Ecology
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• 제25권1호
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• pp.63-70
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• 2002

This study examined the changes of water quality in relation to distribution of hydrophytes, and the purification capacity of Zizania latifolia to improve the effluent from Munpyeong stream from March 1997 to December 1999. While the concentration of nitrogen and phosphorous in water were increased during the farming season, those decreased, during the streaming down to paddy and drainage areas. In investigated sites, the Z. latifolia was dominant community according to the development of the natural wetlands. Furthermore, it formed a large community owing to its high adaptability to environmental changes in the agriculture lands. In September, the leaves productivity of the Z. latifolia were 4,032g D.W/$m^2$and roots were 7,680gD.W/$m^2$. The purification capacity of the Z. latifolia for NH$_3$-N, $No_3$-N, and PO$_4$-P were 13.41, 17.07, and 4.58 respectively during 5 days. The results suggested that it needs to establish wetlands vegetated by hydrophytes to improve the water quality of the effluent from agricultural lands.

• 유기물자원화
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• 제8권4호
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• pp.153-159
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• 2000

본 연구는 소각재 주체의 준호기성 매립지를 대상으로 폐기물 매립지가 보유하고 있는 오염물질에 대한 정화능력을 최대한 활용할 수 있는 조기안정화 매립공법을 개발하기 위한 기초적 연구로, 대형 모의 매립실험을 약 4년간 실시하여 폐기물 매립고의 차이에 따른 오염물질의 정화능을 평가하여 다음과 같은 결론을 얻었다. TOC 성분은 폐기물 매립고가 증가할 수록 매립지내에서의 분해량이 많아지는 것으로 나타났으며, T-N의 경우에는 매립고 6m까지는 매립고가 증가할수록 폐기물의 분해능이 향상되는 것으로 나타났으나, 6m 이상부터는 매립고의 증가와는 무관한 것으로 나타났다. 따라서 모의 매립조 내부에서의 TOC와 T-N 성분의 물질수지를 평가할 때 폐기물 매립고가 6m정도 일때 오염물질에 대한 정화능이 가장 뛰어난 것으로 평가되었다.

• 한국수소및신에너지학회논문집
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• 제27권6호
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• pp.628-635
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• 2016

Natural gas reformed hydrogen is used as a fuel of fuel cell vehicle, PSA process is used for the purification of reformed hydrogen. In this study, the performance of CO adsorbent in PSA process was evaluated. Zeolite adsorbents used in the commercial PSA process is used. The physical and chemical properties of adsorbents were characterized using BET apparatus, XRD, and FE-SEM. The breakthrough apparatus modified from GC was used for the CO breakthrough experiment, the quantitative analysis of CO adsorption capacity was performed using CO breakthrough curve. Zeolite 10X and 13X showed superior CO adsorption capacity than activated alumina. The CO adsorption capacity of zeolite 10X is more than twice of zeolite 13X even the BET surface area is low. It seems that the presence of $Ca^{2+}$ cation in zeolite 10X is beneficial to the adsorption of CO.

• 한국수산과학회지
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• 제32권4호
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• pp.409-415
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• 1999

우리나라 갯벌의 오염물질 정화능력을 알아보기 위해 물리, 화학적 특성이 서로 다른 충남 서천군 춘장대 갯벌, 전북 옥구군 어은리 갯벌 그리고 전북 계화도 갯벌을 채취하였다. 실험은 갯벌의 물리화학적 성분분석을 행하고, 갯벌을 채운 반응기를 이용해 유기물, 영양염류 및 중금속의 정화능력을 평가해 보았다. 1. 3개 갯벌의 입도분석 결과 어은리 갯벌이 니질의 함량이 $98.8\%$로 가장 높고, 춘장대 갯벌은 모래성분이 $97.84\%$로 가장 높았다. 유기물함량 (IL, COD, POC)는 니질 함량이 높은 어은리 갯벌에서 다른 두 갯벌 보다 2$\~$8배 이상 높았다. 2. 갯벌의 유기물 정화능력을 COD로 계산한 결과, 어은리 갯벌 0.75kg/ha/12hr, 계화도 갯벌 0.60kg/ha/12hr 그리고 춘장대갯벌 0.55 kg/ha/12hr 이었고, 3개 갯벌의 1일 평균 COD 정화능력은 1.27kg/ha/day이었다. 앞의 결과를 새만금 간척사업으로 소멸될 면적 (20000ha)에서 제거될 수 있는 유기물량으로 환산하면 25.4 ton/day로 계산되었다. 3. 갯벌의 영양염류 정화능력은 인산 인의 경우, 계화도에서 0.21 kg/ha/12hr, 어은리에서 0.39kg/ha/12hr, 그리고 춘장대에서 0.22kg/ha/12hr였고, 질산질소는 계화도에서 0.53kg/ha/12hr, 어은리에서 0.74kg/ha/12hr 그리고 춘장대에서 0.43kg/ha/12hr 이었다. 4. 갯벌의 중금속 정화능력은 Cu의 경우, 계화도 갯벌 88.9g/ha/12hr, 어은리 갯벌 89.1 g/ha/12hr 그리고 춘장대 갯벌 55.3g/ha/12hr이고 Pb은 계화도 갯벌 11.0g/ha/12hr, 어은리 갯벌 18.0g/ha/12hr 그리고 춘장대 갯벌 13.1g/ha/12hr그리고 Cd은 계화도 갯벌 1.7 g/ha/12 hr, 어은리 갯벌 2.6 g/ha/12 hr 그리고 2.1 g/ha/12 hr 이었다. 이상의 결과에서 갯벌의 정화능력은 니질의 함량이 많은 어은리 갯벌이 모래로 이루어진 춘장대 갯벌보다 상대적으로 높은 정화능력을 나타내어, 갯벌의 물리, 화학적 성상이 중요한 역할을 하는 것으로 나타났다.

• 환경영향평가
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• 제20권6호
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• pp.815-821
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• 2011

This study aims to estimate the biological decomposition capacity of MPC(Microorganism Porous-Concrete). MPC has specific surface area formed by inside pores, and bio compound was added to those pores to reduce pollutants loading. To evaluate the water purification capacity of MPC, we carried out the comparative studies using different media types [GPC(General Porous-concrete), CPC(Compound porous-concrete), LPC(Lightweight aggregate porous-concrete)] under the condition of CFSTR, and different retention times (30, 60 and 120 min). We also estimated the purification capacity of MPC under different concentrations of pollutant loadings. The MPC showed higher efficiency in water purification function than other conventional porous concretes with efficient decrease rates of SS, BOD, COD, and nutrient concentrations. In the comparison experiment for different retention times, MPC showed the highest removal efficiency for all tested pollutants in the longest retention time(120 min). In the long period test, the removal efficiencies of MPC concrete were high until 100 days after the set up of the operation, but began to decrease. Outflow flux was invariable compared with inflow flux so that extra detention time for media fouling such as back washing is not needed. But the results suggested that appropriate management is necessary for long-term operation of MPC. As the final outcome, MPC using bio organisms is considered to be efficient for stream water purification when they used as substrates for artificial river structure.

• JSTS:Journal of Semiconductor Technology and Science
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• 제1권4호
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• pp.232-238
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• 2001

A new DNA purification chip is proposed and fabricated for the sample preparation of Nucleic Acid (NA) probe assay. The proposed DNA purification chip is fabricated using photosensitive glass substrate and polydimethylsiloxane (PDMS) cover fixture. We have successfully captured and eluted the DNA using the fabricated photosensitive glass chip. The fabricated DNA purification chip showed a binding capacity of $15ng/\textrm{cm}^2$and a minimum extractable input concentration of $100copies/200\muL$. The proposed DNA purification chip can be applied for low-cost, disposable sample preparation of NA probe assays.

• The Korean Journal of Ecology
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• 제23권2호
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• pp.163-167
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• 2000

To evaluate the water purification capacity of 4 emergent macrophytes in 4 tributaries of Mankyung River, nitrate reductase activity (NRA) and nutrient removal capacity were determined. Higher NRA occurred in emergent macrophytes such as Persicaria thunbergii and Oenanthe iavanica with 7.8 and 5.4 ${\mu}$moi NO$_2$ g$^{-1}$d.wt. h$^{-1}$. respectively. The nitrogen removal capacity of emergent macrophytes displaying higher NRA fell within the range of 0.85 to 1.95 mg g$^{-1}$d.wt. day$^{-1}$ and was higher in the order Phragmites communis > Persicaria thunbergii > Oenanthe iavanica > Zizania latifolia. The phosphorus removal capacity was within the range of 0.07 to 0.12 mg g$^{-1}$d.wt. day$^{-1}$ and was higher in the order Phragmites communis > Oenanthe iavanica > Persicaria thunbergii > Zizania latifolia. In all the domestic, industrial and agricultural wastewaters, Phragmites communis showed the highest nitrogen and phosphorus removal capacity; 1.36 and 0.0088 mg g$^{-1}$d.wt. day$^{-1}$ respectively. Among the 4 macrophytes. Phragmites communis was the most suitable species for water purification in 4 tributaries of Mankyung River.

• 한국환경과학회지
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• 제10권5호
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• pp.315-321
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• 2001

This study was conducted to estimate the decomposition capacity for organic matter by microbe of tidal flat sediments (Hajae, Dongjin and Mankyung). The decomposition rate constants (K') have been determined by Thomas slope method and compared with the values of each tidal flats. The decomposition rates of organic matter by microbe were initially very slow, but at the end of 12 hours, very sharply increased. The values of decomposition rate constant for Dongjin, Mankyung and Hajae tidal flat sediment were 1.364$day^{-1}$/, 1.080d$day^{-1}$ and 0.735$day^{-1}$, respectively. The decomposition rate constant of Dongjin tidal flat sediment which affected by livestock wastewater was higher than others. The decomposition quantity (mg/g/day) of organic matter by microbe of tidal flat sediments was 0.4mg/g/day for Dongjin, 0.36mg/g/day for Mankyung and 0.36mg/g/day for Hajae. The average of decomposition quantity was 0.37mg/g/day. To calculate purification capacity (kg/ha) of organic matter by microbe, we applied to two assumption ; 1) biological action by microbe is occur within 0.1cm under surface 2) specific gravity of sediment are 2.5g/$\textrm{cm}^2$. The purification capacity of organic matter by microbe of tidal flat sediment was calculated to 9.25kg/ha. The relationships between decomposition rate constant (K') and ignition loss (I. L), chemical oxygen demand by sediment (CO $D_{sed}$), total carbon(TC), silt and clay as index of organic matter were a high positive($R^2$=0.97~1.00).

• 한국환경복원기술학회지
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• 제6권3호
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• pp.17-28
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• 2003

The objective of this study is to review and verify whether the functions and effect of roadside trees generally known in theory are actually realized in urban roads and how well they are performed if the function and effect are really realized. The study was conducted with a focus on air purification effect of roadside trees. The m헤r study result is as follows. First, calculation of air purification effect of roadside trees showed that it is minimal. However, 7.4 units of broad-leaved trees is necessary in order to purify $SO_2$ discharged by one passenger car and 1,803.3 trees to purify $NO_2$. Second, regarding pollutant absorption capacity, air pollutant absorption capacity increased as the number of rows planted gets higher (i.e., 2-row plantation absorbs pollutant better than I-row plantation). In particular, "2-row plantation + lower-level shrub + buffer green belt" was as eight times high as "I-row plantation" in absorption capacity. Third, out of 30 roads with over 8 lanes in 15 cities, only 33.3% or a total of ten roads in seven cities had a median strip. Out of these ten roads, nine roads were planted in a double-layer consisting forest trees, shrubs, ground plants (grass). Analysis showed that out of six tree species planted along these roads, about a half of them were weak to air pollution. Also, based on the outcome of this study, charging a "plantation due" when people purchase a new car, improving layout of roadside trees, and reinforcing plantation of air purification tree species when selecting tree species for roadside trees were proposed.

• 한국균학회지
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• 제16권3호
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• pp.121-127
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• 1988

흰느타리버섯(Pleurotus cornucopiae(Per.) Rolland)중의 단백질을 선택적으로 분리정제하기 위하여 AH-Sepharose 4B를 출발 물질로 하여 benzoyl-AH-Sepharose 4B를 합성하여 친화성 크로마토그래피하였다. 1) AH-Sepharose 4B 중의 amino기의 capacity는 겔 Iml 당 $9.5{\mu}mol$ 이었으며 합성겔의 리간드인 benzoyl기의 capacity는 겔 1ml당 $9.3{\mu}mol4이었다. 2) 친화성이 있는 단백질의 총 겉보기 분자량은 255,000 돌톤 이었으며, 이는 29,500, 31,500, 34,000, 71,000 및 89,000돌톤 단백질의 복합체였다. 3) 친화성 단백질 중의 아미노산 함량은 비극성 아미노산이 45.68%, 극성 아미노산이 26.93%, 양성 아미노산이 11.81%, 그리고 음성 아미노산이15.58%였다. 4) 소수성 benzoyl기에 친화성이 있는 단백질은 비극성인 것이 선택적으로 분리되었다.