• Title, Summary, Keyword: 차콜

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Sorption and Leaching Studies of Fenitrothion and Tebuconazole in Granular Activated Carbon and Charcoal (Fenitrothion과 Tebuconazole의 입상 활성탄 및 차콜에 의한 흡착과 용탈에 관한 연구)

  • Lee, Dong-Ik;Chun, So-Ul;Joo, Young-Kyoo
    • Asian Journal of Turfgrass Science
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    • v.20 no.1
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    • pp.47-55
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    • 2006
  • Golf course community has always been concerned about water quality regarding to pesticide and fertilizer managements. This study conducted to investigate sorption and leaching behavior of common pesticides used for golf course in granular activated carbon I (GAC 1), granular activated carbon II(GAC II), and charcoal. We used batch study to investigate the influence of concentrations of Smithion and Folicur and particle sizes of GAC I, GAC II, and charcoal on sorption. Also, column study was used to investigate the leaching effect of Smithion in GAC I and charcoal. We found that sorption of Smithion and Folicur were higher in less $45{\mu}m$ of particle size for GAC I, GAC II, and charcoal compared to $1.7{\sim}2.0mm$ size, and the sorption of Smithion and Folicur in less $45{\mu}m$ of particle size ranged from 90 to 99%. In the column study, there was no difference in leaching effect between GAC I and charcoal. Overall, we found that charcoal might offer a cost effective adsorbent as a pesticides in leachate.

KFIA News

  • Korea Far Infrared Association
    • Journal of Korea Far Infrared Association
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    • pp.15-16
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    • 2002
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Synthesis of Pd-Ag on Charcoal Catalyst for Aerobic Benzyl Alcohol Oxidation Using [Hmim][PF6] ([Hmim][PF6]를 사용한 벤질 알코올의 호기성 산화반응용 팔라듐-은 차콜 촉매 제조)

  • Choo, Yunjun;Yoo, Kye Sang
    • Applied Chemistry for Engineering
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    • v.25 no.4
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    • pp.425-429
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    • 2014
  • Pd on charcoal particles were prepared by wet impregnation to develop commercial catalyst for aerobic benzyl alcohol oxidation. Especially, one of room temperature ionic liquids, [Hmim][$PF_6$], was used as an effective solvent in the synthesis to improve the metal dispersion of the catalysts. Among the Pd/Charcoal with various Pd concentrations, 7.5 wt% catalyst showed the higher catalytic activity and stability. Moreover, Ag was used as a promoter with various ratios in catalyst preparation. Under identical reaction conditions, the catalyst with 9 : 1 of Pd and Ag weight ratios was most active due to higher metal dispersion.

Attenuation Characteristics of AE/MA Waves in Charcoal Granite (차콜 화강암에서의 AE/MA파의 감쇄특성)

  • 김교원
    • The Journal of Engineering Geology
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    • v.6 no.3
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    • pp.131-136
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    • 1996
  • Attenuation characteristics of AF/MA motions which involve high frequencies were investigated through pencil-lead fracture tests on a fine-grained granite specimen. For the study, calibrated six transducers were employed to detect the signals and the pencil-lead was fractured as a step unloading force to generate AE/MA signals. The arnplitude AE/MA waves is affected by the relative orientation of source and transducer as well as the source distance. The attenuation constant for Charcoal granite is obtained as 1.058 which could be applied for a given ray-path regardless of the relative orientation of source and transducer.

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Effects of Properties of Binder between Electrode and Dielectric Barrier on Ozone Generation Characteristics (전극과 유전체장벽간의 접착물질의 물성변화가 오존발생특성에 미치는 영향)

  • 박승록;김진규;김형표
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.16 no.6
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    • pp.119-125
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    • 2002
  • The temperature decrease of discharge space was very important to generate the high concentration of ozone in silent discharge type ozone generator. At this time, binding materials and methods between dielectric barrier and ground electrode affected to the discharge importantly in electrical and thermal point of view. So, above two factors become very important parameters should be considered before designing the ozone generator. In this study, binders of silicone compound, electroconductive resin and charcoal were used for variations of binders properties. Resultantly, when the binding materials were used, better ozone generation characteristics were shown(maximum ozone generation 28044[ppmV] at 6.0[kV]) in comparison with the non-used case (maximum ozone generation 15944[ppmV] at 4.0[kV]). In addition, when the binding materials were used, the case of pure silicone compound showed better characteristics(maximum ozone generation 28044[ppmV] at 6.0[kV]) than the cases of conductive binding materials(maximum ozone generation 25842[ppmV] at 5.5[kV] and including the charcoal 5%).

An emotional study on the knitted fabrics by color characteristics (색 특성에 따른 니트 소재의 감성에 관한 연구)

  • Gwon, Yeong-A;Lee, Ji-Eun
    • Proceedings of the Korean Society for Emotion and Sensibility Conference
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    • pp.235-238
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    • 2009
  • 최근 생활수준의 향상으로 의복의 기능성이 중시되면서, 건강, 감성, 쾌적 등에 대한 욕구를 충족시킬 수 있는 건강 소재 개발에 대한 연구와 니트에 관한 선호도 및 감성연구는 활발히 진행되고 있다. 그러나 현재까지 건강 니트 소재의 감각 및 감성이미지에 관한 연구는 부족한 실정이다. 본 연구는 키토산 섬유와 서스 섬유의 니트 소재를 편성한 다음 최종 소비자의 감각과 감성이미지에 미치는 영향을 연구하여 실제 건강 니트 소재를 기획하는데 필요한 정보를 제시하고자 한다. 본 연구에서 키토산 섬유와 서스 섬유를 회색계열로 변화를 주어 10 게이지의 컴퓨터 자동 횡편기로 5 종의 평편 시료를 편성하였고 20 대 남녀 대학생 69 명을 대상으로 5 종의 시료($20\;cm{\times}15\;cm$)를 랜덤한 순서로 제시하여 눈으로 시료를 보고 직접 만지면서 평가하도록 하였으며, 감각 18 개와 감성 22 개, 선호도 3 개의 총 43 개 형용사로 이루어진 7 점 척도를 사용하였다. 건강 니트 소재의 감각 및 감성 이미지를 요인 분석한 결과, 감각요인은 '부피감', '요철감', '신축감', '현시감', 변형감'의 5 가지 요인, 감성요인은 '온유감', '안정감', '고급감', '활동감'의 4 가지 요인으로 분류되었다. 색 속성 중 명도 수준별 감각요인 및 감성요인 중 '요철감'과 '안정감'의 매우 유의한 차이가 나타났다. 고명도, 저명도 수준은 울퉁불퉁하고 오톨도톨하지만 안정적이고 깨끗한 이미지로 느끼는 것으로 나타났고 중간 명도수준은 '요철감'과 '안정감'이 감소되었다. 차콜색의 키토산 100%와 연회씩의 서스 100%의 경우 울퉁불퉁하고 오톨도톨하지만 안정적이고 깨끗한 이미지로 느끼는 것으로 나타났고, 차콜색 키토산섬유와 연회색 서스섬유를 혼방하여 편성한 경우 '요철감'과 '안정감'이 감소되었다.

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A Study on the Development of the Charcoal with Low Carbon Monoxide Emission using Biomass Combustion Improver (바이오매스 조연제를 이용한 CO저감형 착화탄 개발에 대한 연구)

  • Kim, Seunghee;Lee, Yeonkyung;Lee, Junseok;Jeon, Chunghwan
    • Journal of Energy Engineering
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    • v.25 no.3
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    • pp.9-17
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    • 2016
  • In this study, a method for CO reduction using char-coal combustions was developed with lignin and glycerin as combustion improvers. The relationship between CO emission and the combustion improvers was confirmed by measuring the CO concentration. The experiment to determine the combustion characteristics was conducted using glycerin, which shows high combustibility at low temperatures, impregnated with lignin, which has a specific surface area. The combustibility, volatility, and CO concentration were measured using thermo-gravimetric analysis(TGA), and gas chromatography-mass spectrometry(GC-MS). This study presents the optimal CO reduction ratio, which occurred when the combustible material contained a 20% blend of combustion improvers. This resulted in a 20-30% CO reduction rate compared to that achieved with normal char-coal.