• Current Research on Agriculture and Life Sciences
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• 제8권
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• pp.29-34
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• 1990

Zeolite에 의(依)한 $NH_4{^+}$의 흡착반응(吸着反應)에 영향(影響)을 미치는 열처리(熱處理)에 의(依)해 조사(調査)하고 배양실험(培養實驗)을 통하여 Zeolite에 흡착(吸着)된 $NH_4{^+}$의 소실량(消失量)을 조사(調査)하였다. Zeolite의 주구성점토광물(主構成粘土鑛物) Clinoptiolite와 mordenite였다. Zeolite에 의(依)한 $NH_4{^+}$의 흡착반응(吸着反應)은 4시간(時間) 진탕으로 흡착평형(吸着平衡)에 도달(到達)하였다. 열처리온도(熱處理溫度)가 높을수록 치환성(置換性) $K^+$의 합량(合量)은 증가(增加)하였으나 $NH_4{^+}$의 흡착량(吸着量)은 감소(減少)하였다. 유안(硫安)을 처리(處理)한 토양(土壤)을 담수상태(湛水狀態)에서 배양(培養)한 결과(結果) 시간(時間)이 경과(經過)할수록 토양중(土壤中) $NH_4{^+}$ 잔류량(殘留量)이 감소(減少)한 반면(盤面) Zeolite에 흡착(吸着)된 $NH_4{^+}$는 동일기간(同一期間) 내(內)에 소실(消失)되지 않았다. 그러므로 Zeolite에 흡착(吸着)된 $NH_4{^+}$은 여러 가지 작용(作用)에 의(依)한 소실(消失)에 대(對)해 저항성(抵抗性)이 크다고 할 수 있다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2006년도 하계학술대회 논문집 Vol.7
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• pp.175-176
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• 2006

Zeolite의 이온교환 특성과 균일한 기공과 결정 모양을 가지는 구조적 특성을 이용하여 CdS 양자점 클러스터를 합성하였다. 합성된 CdS-Zeolite는 구조적으로 안정된 나노 크기의 새로운 반도체 물질이 된다. 또한 Zeolite 결정들이 유리판에 밀집하여 배열되는 경향을 이용하므로 CdS 양자점이 합성된 제올라이트를 기판에 정렬, 박막을 형성한다. CdS-Zeolite 결정 박막은 SEM 측정을 통해 구조와 표면 정렬 상태를 알고, photoluminescence 측정으로 양자점 특성의 발광 파장을 가짐을 알 수 있다.

• 한국환경과학회지
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• 제21권5호
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• pp.573-578
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• 2012

In this study, adsorption of polychlorinated biphenyls(PCBs) in transformer oil on powder activated carbon (PAC) and synthetic zeolite was evaluated. Adsorption characteristics of PCBs on the PAC and zeolite has been investigated in a batch system with respect to adsorbents amount and contact time. BET results showed 908 m2/g for PAC and 483 m2/g for zeolite. The adsorption capacity of PCBs increased with an increasing input amount of absorbent. The adsorption experimental results showed that PAC removed 90% of input PCBs in transformer oil while zeolite removed only 64%. Adsorption of PCBs to PAC and zeolite fit the Freundlich model well. The Freundlich parameter, Kf, for PAC and zeolite was 193.1 and 43.0 respectively, indicating that PAC is effect adsorbent for PCBs adsorption in transformer oil.

• 한국식품조리과학회지
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• 제30권2호
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• pp.193-199
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• 2014

The purpose of the study was to investigate the quality characteristics and sensory properties of fresh and boiling pork shoulder at different feed ration of zeolite (0, 0.5, 1.0 and 2.0%). All of the dietary zeolite groups had significantly higher pH than the control; 0.5% zeolite (6.14) had the highest pH. Cooking loss was significantly higher in the control compared to other treatments; further, the loss, increased as the feed ratio of zeolite addition increased. The cooking loss of fresh pork shoulder fed with 0.5% zeolite (22.47%) was significantly lower than other treatments. The dissolution crude lipid of 0.5% zeolite was the lowest, but was not significant. In the Hunter's color value of fresh pork shoulder, the L and a values were significantly higher in 0.5% zeolite compared to other treatments, whereas the b value was significantly higher in 2.0% zeolite. In the Hunter's color value of boiling pork shoulder, the L and b values with 0.5% zeolite were significantly higher compared to other treatments; however, the a value was not significantly different between groups. The hardness, springiness, cohesiveness, gumminess and chewiness of fresh pork shoulder were significantly increased as the feed ration of zeolite increased. These properties, except for springiness in boiling pork shoulder were significantly increased as the feed ration of zeolite increased. Furthermore, sensory characteristics of color, taste, flavor, appearance and overall preference were significantly higher in boiling pork shoulder with 0.5% zeolite compared to other treatments. Also, texture preference, which was decreased as the feed ratio of zeolite increased, was higher in the control compared to other treatments. In conclusion, the quality characteristics and sensory properties of pork shoulder meat were enhanced with the dietary supplementation of zeolite.

• 한국환경농학회지
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• 제26권3호
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• pp.259-266
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• 2007

천연 지올라이트를 파쇄하여 일정한 크기의 입제를 생산하는 과정에서 부가가치가 낮은 다량의 미분이 부산물로 발생하고 있다. 본 연구에서는 분말의 천연 지올라이트를 토양 개량제나 폐수처리제의 활용성을 증대시키기 위해 포트랜드 시멘트를 접착제로 혼합하고 열처리하여 재입단화 하였다. 본 실험에 사용한 천연 지올라이트는 경북 영일만 일대에서 산출된 것으로 규반비(Si/Al) 4.8, 양이온치환용량(CEC) 68.1 cmol $kg^{-1}$이었고, clinoptilolite, mordenite이 주 광물이었으며, 기타 smectite, feldspar, quartz 등으로 이루어져 있다. 입상 지올라이트는 미분의 천연 지올라이트에 25%의 포트랜드 시멘트를 접착제로 혼합하고 토련기로 성형한 후 입단화 하였다. 이 시료는 $25^{\circ}C$에서 30일간 양생하고 $400^{\circ}C$에서 3시간 동안 열처리하였을 때 가장 효율적으로 나타났다. 입상의 지올라이트를 조제하는 과정에서 비정질의 산화광물이 생성되어 지올라이트 입단의 X-선 회절폭이 넓게 나타났고, 천연 지올라이트에 알칼이와 열처리한 시료에서는 가변전하 특성을 나타났다. 지올라이트 입단의 주요한 광물은 clinoptilolite, mordenite, tobermorite였고 천연 지올라이트와 비교해 볼 때 pH 완충력과 전하밀도가 증가하였다.

• 한국토양비료학회지
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• 제48권3호
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• pp.218-224
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• 2015

Zeolite may help crop growth, yield increase, and salt removal. Field experiment under greenhouse cultivation was conducted to study the effect of zeolite application on growth and yield of Chinese cabbage (Brassica campestris L.) and soil. Soil was classified as Gyuam series (coarse silty, mixed, nonacid, mesic family of Aquic Fluvaquentic Eutrudepts). Six zeolite rates were 0, 3, 5, 10, 20 and $40Mg\;ha^{-1}$. Experimental design was a completely randomized design. Chinese cabbage was grown three times consecutively. Established plant number of plant and yield as fresh weight (F.W.) were measured and soil samples were taken before and after harvesting. Chinese cabbage yield was $76.9Mg\;ha^{-1}$ at a rate of $20Mg\;zeolite\;ha^{-1}$, $54.3Mg\;ha^{-1}$ at a rate of $5Mg\;zeolite\;ha^{-1}$, and $51.3Mg\;ha^{-1}$ at control (no zeolite), respectively. Second order regression analysis using zeolite rate and yield showed that optimum zeolite application rate was between 24 and $26Mg\;ha^{-1}$. The regression equation explained about 88% of the yield variability. The electrical conductivity (EC) decreased from 3.2 to $1.0dS\;m^{-1}$ for all treatments so that salt accumulation was not a concern. Based on the results, we recommend that optimum zeolite application rate is between 20 and $24Mg\;ha^{-1}$ for Chinese cabbage under greenhouse cultivation.

• 한국안전학회지
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• 제27권6호
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• pp.59-63
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• 2012

The use of dry chemical powder has been increased as it can be stored for a long period and sustain in stable condition compared to gas or liquid phase extinguishing agents. A new type of dry chemical powder using Zeolite was produced in the research. Chemical powder was adsorbed into Zeolite 13X, a porous material appearing negative catalytic effect, to create extinguishing powder obtaining core shell structure and measured physical properties and run a small scale fire extinguishment. SEM, XRD, TA analysis was also executed, and extinguishing characteristics were measured by fire extinguishing experiment on oil pool fire. The experiment showed that the average particle size of Zeolite 13X was equivalent, indicating about $3{\pm}1{\mu}m$ and thermal analysis result illustrated that Zeolite 13X showed exothermic reaction peaks at $900^{\circ}C$ due to solid-state transformation. Extinguishing characteristics on oil fire of $NaHCO_3$/Zeolite 13X and $NH_4H_2PO_4$/Zeolite were improved, influenced by adsorbed extinguishing powders on Zeolite 13X and Zeolite 13X that contains high phase transition temperature.

• 한국표면공학회지
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• 제46권6호
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• pp.277-282
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• 2013

This study is an experimental attempt to confirm the binder effect of zeolite coating on glass plate by heat treatment. As a result, zeolite was successfully formed with low concentratios of pressure, whose concentration was effective in 10% or more for thin film zeolite coating. And as the content of the binder (TEOS) in mixed coating solution was higher, the zeolite was fastened better on the surface. Above 5% content of the binder in the coating solution, TEOS hindered zeolite synthesis of the precursor and brought to zeolite capacity decrease. Furthermore, when the concentration of the precursor, sedimentation rate of the precursor was higher and the coating efficiency is reduced thereby. Therefore, the most effective concentrations of the precursor and TEOS in the coating solution was 10% and 5%, respectively. It was concluded that zeolite coating is produced by heat treatment method after dipping without hydrothermal synthesis.

• 공업화학
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• 제16권1호
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• pp.61-67
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• 2005

고분자 분리막에 비하여 열적, 기계적, 화학적 안정성이 우수한 친수성 NaA 및 NaY 제올라이트 분리막을 투과증발 막분리 공정에 적용하여 물/에탄올 혼합물에서 선택적으로 물을 분리하고자 하였다. 공급되는 에탄올의 농도 변화 및 투과증발 실험 온도의 변화가 투과플럭스와 물 선택도에 미치는 영향을 고찰하였다. NaA 제올라이트 분리막은 투과증발 실험 결과 NaY 제올라이트 분리막에 비해 동일 실험 조건에서 물의 투과 선택도는 1000배 이상 우수하나 물 투과플럭스는 상대적으로 작아 약 1/2 정도였다.

• 한국농공학회논문집
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• 제59권5호
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• pp.41-49
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• 2017

This study was aimed to investigate the influence of cation exchange capacity (CEC) and application amounts of zeolite on the stabilization of heavy metals (As, Ni, Pb, and Zn) in upland soils. The upland soils were sampled from field near mines located in Gyeonggi Province. The CEC of zeolite was treated at three different levels, ie, low, medium, and high, while zeolite was amended with soils at the ratio of 0.1 % and 0.5 % as to soil weight. A sequential extraction was performed for the soil sampled at 1, 2 4, and 8 week after zeolite was added to the soil. The concentrations of Pb and Zn appeared to be high in the sampled soils. The mobility of heavy metals obtained from sequential experiments was as follows: Pb > Zn > Ni >As. Addition of zeolite to contaminated soils effectively reduced exchangeable and carbonate fractions but increased organic and residual fraction, indicating that zeolite is effective for immobilizing heavy metals in soils. The influence of incubation time on the metal stabilization was rather pronounced as compared to the application amount and CEC of zeolite.