• 한국환경과학회지
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• 제7권5호
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• pp.697-705
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• 1998

$Pb^{2+}$ removal capacity and initial $Pb^{2+}$ removal rate were compared between non-biomaterials (granular activated carbon, powdered activated carbon, ion exchange resin, zeolite) and biomaterials (activated sludge, Aureobasidium pullulans, Saccharomyces cerevisiae). The $Pb^{2+}$ removal capacity of biomaterials were greater than that of non-biomaterials, generally. The $Pb^{2+}$ removal capacities of non-biomaterials and biomaterials were shown on the order of ion exchange resin ＞ zeolite ＞ granular activated carbon ＞ powdered activated carbon and A. pullulans ＞ S. cerevisiae ＞ activated sludge, respectively. In the initial $Pb^{2+}$ removal rate, the non-biomaterials showed powdered activated carbon ＞ granular activated carbon ＞ zeolite ＞ ion exchange resin and the biomaterials showed A. pullulans ＞ activated sludge ＞ S. cerevisiae. Comparing the $Pb^{2+}$ removal capacity and initial $Pb^{2+}$ removal rate of activated sludge with those of other non-biomaterials and biomaterials, activated sludge may have an availability on the removal of heavy metal ions by the economical and pratical aspects.

• 한국대기환경학회지
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• 제21권2호
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• pp.155-160
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• 2005

Removal of methyl mercaptan was investigated using adsorption on virgin activated carbon (VAC) and modified activated carbons with acidic chemicals in the present work. CAC, NAC, AAC and SAC were represented as activated carbons modified with HCI, HNO$_{3}$, CH$_{3}$COOH and H$_{2}$S0$_{4}$ ,respectively The pore structures were evaluated using nitrogen isotherm. The surface properties of virgin activated carbon and modified activated carbons were characterized by EA, pH of carbon surface and acid value from Boehm titration. The modification of activated carbon with acidic chemicals resulted in a decrease in BET surface area, micropore volume and surface pH, but an increase in acid value. The order of the adsorption capacity of activated carbons was NAC>AAC>SAC>CAC>VAC, and in agreement with that of acid value of activated carbons, whereas in disagreement with that of micropore volume of activated carbons. It appeared that chemical adsorption played an important role in methyl mercaptan on modified activated carbons with acidic chemicals compared to virgin activated carbon. Modifying activated carbon with acidic chemicals enabled to significantly enhance removal of methyl mercaptan.

• KSBB Journal
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• 제29권5호
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• pp.353-360
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• 2014

This study targets the pollutant removal of secondary effluent from final clarifiers in wastewater treatment plant using silver nanoparticles on activated carbon. The removal efficiency and treatment characteristics of pollutant are anlayzed by perfoming experiments using granular activated carbon with silver nanoparticles and ordinary granular activated carbon. The specific surface area of granular activated carbon with silver nanoparticles is smaller than that of ordinary granular activated carbon. However, the removal efficiency of $COD_{Mn}$, T-N and T-P in experiments using activated carbon with silver nanoparticles are higher than that in experiment using ordinary granular activated carbon. That means the case of activated carbon with silver nanoparticles is much better at treatment activity. In addition, activated carbon with silver nanoparticles has antimicrobial activity because there is no microbe on the surface of it after experiments.

• 한국환경과학회지
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• 제9권4호
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• pp.345-349
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• 2000

Activated carbons were prepared from Korean coal by steam activation in this study. The variation of pore structure of the activated carbons were investigated according to different carbonization temperatures. Yield, surface area, pore volume and pore structure of this activated carbon were compared with those of activated carbon prepared without carbonization. The investigated carbonization temperature ranged from 700${\circ}C$ to 1,000${\circ}C$. Carbonization was carried out in nitrogen atmosphere for 70 minutes and activation was performed by steam at 950${\circ}C$ for 210 minutes. Surface area and pore volume of the resulting activated carbons increased with carbonization temperature. Also pore volume increased by 20% compared to the activated carbon without carbonization. Especially, in mesopore region, the activated carbon carbonized at 900${\circ}C$ had more pores by 60% than that of activated carbon carbonized at other temperature.

• 한국농공학회논문집
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• 제51권1호
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• pp.21-26
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• 2009

This study was performed to evaluate the physical and mechanical properties of concrete using waste activated carbon. Materials used were ordinary portlant cement, crushed coarse aggregate, natural fine aggregate, waste activated carbon, and superplasticizer. The substitution ratios of waste activated carbon were 0,1,2,3,4,5,6,7,8,9 and 10%. The unit weight was decreased and water absorption ratio was increased with increasing the waste activated carbon content, respectively. When the substitution ratio of waste activated carbon was 3%, compressive strength, flexural strength and dynamic modulus of elastisity were more higher than that of the ordinary portland cement (OPC), and it was decreased with increasing the waste activated carbon content, respectively. The most effective contents of waste activated carbon was 2% in performance and 4% in practical use Accordingly, waste activated carbon can be used for concrete material.

• 한국자원식물학회지
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• 제14권2호
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• pp.148-151
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• 2001

한약재로 수요가 많고 꽃이 아름다워 화훼용으로 개발 가능성이 있는 황금을 활성탄을 사용하여 분화재배를 실시할 경우 꽃의 수명이 오래가고 수확시 품질이 양호한 한약재를 생산 할 수 있을 것으로 기대되어 본 시험을 수행 한 결과는 다음과 같다. 1. 황금의 생장은 활성 탄(Activated Charcoal) 30%가 첨가되었을때 경장과 경태가 크고 가지수가 많아 생육이 가장 양호하였다. 2. 황금의 개화는 각 처리 공히 90%이상이 개화되었다. 3. 수량은 활성탄(Activated Charcoal)이 30%첨가되었을 때 생육이 양호하여 근경과 근장이 크고 근중이 무거워서 증수되는 경향이었다. 이와 같은 이유는 활성탄 시용에 의한 토양의 보수력과 보비력이 양호하여 물리성이 향상된 것으로 생각되며 이보다 더 낮은 농도나 높은 농도에서는 효과가 적은것으로 나타났다. 이상과 같은 결과로 보아 황금을 재배할 경우 활성탄(Activated Charcoal)의 효과가 인정되어 약초의 종류에 따른 농도별 시험이 계속적으로 이 루어 져야 할 것으로 사료된다.

• 한국자원식물학회지
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• 제16권2호
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• pp.130-133
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• 2003

폐활성탄을 토양개량제로 활용하기위한 기초시험으로서 시호의 포트시험을 실시한 결과 시호의 생장은 폐활성탄(activated charcoal) 10∼30%가 첨가되었을 때 경장과 경태가 크고 분얼수가 많아 생육이 양호하였다. 근의 생장과 비대는 폐활성탄(activated charcoal) 10-30% 첨가되 었을때 주근장과 근직경이 크고, 근중이 무거워서 증수되는 경향이었다. 이와 같은 이유는 활성탄 시용에 의한 토양의 보수력과 보비력이 양호하여 물리성이 향상된 것으로 생각되며 이보다 더 낮은 농도나 높은 농도에서는 효과가 적은 것으로 나타났다. 이상과 같은 결과로 보아 시호를 재배할 경우 폐활성탄(activated charcoal)의 효과가 인정되어 약초의 종류에 따른 농도별 시험이 계속적으로 이루어 져야 할 것으로 사료된다.

• 한국자원식물학회지
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• 제15권1호
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• pp.57-61
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• 2002

약용작물인 한약재로 수요가 많고 식용으로 이용 가능한 더덕과 도라지를 폐 활성탄을 사용하여 재배할 경우 생산성 을 높이고 고품질을 생산 할 수 있을 것으로 기대되어 본 시험을 수행한 결과는 다음과 같다. 1. 지상부의 생장은 활성탄(Activated Charcoal)처리가 무처리에 비하여 경장과 경직경이 커서 생육이 양호하였으며, 특히 활성탄 20%가 첨가되었을 때 효과가 인정 되었다. 2. 더덕과 도라지의 개화는 각 처리 공히 90%이상이 개화되었고, 그 중에서도 특히 활성탄(Activated Charcoal)10%와 20%처리가 각각 95%가 개화되어 개화율이 높은 경향이었으나 유의성은 인정되지 않았다. 3. 근의 생장은 활성탄(Activated Charcoal)이 20%첨가되었을 때 주근장과 주근폭이 크고 근의 무게가 더 증가되는 경향이었다. 이상과 같은 결과로 보아 더덕과 도라지를 재배할 경우 활성탄(Activated Charcoal)의 효과가 인정되어 약초의 종류에 따른 농도별 시험이 계속적으로 이루어 져야 할 것으로 사료된다.

• 한국연초학회지
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• 제19권1호
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• pp.46-50
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• 1997

The pH of coconut based activated carbon was changed by treating with NaOH and HNO3 and we have calculated the adsorption amounts of ammonia, hydrogen sulfide and methylmercaptan on the activated carbons using the break-through time which was obtained from break-through curve experiments. As a result of this study, the adsorption amounts of ammonia Has on the activated carbons were 2,6 mg/g, 17.2 mg/g and 31.6 mg/g with the pH 11, pH 7 and pH 3, respectively. These results indicated that the adsorption ability of ammonia on activated carbon was increased with decreasing the pH of activated carbon. Otherwise, in the cases of the adsorption experiment of hydrogen sulfide and methylmercaptan on the activated carbons with different pH. the activated carbon with pH 11 showed higher adsorption capacity than the activated carbons with pH 7 and pH 3. The adsorption amounts of hydrogen sulfide and methylmercaptan were 39.9 mg/g and 178 mg/g with pH 11, respectively. Finally, we analyzed the amount of ammonia delivered from 88 Lights cigarette made of triple filter which contained the activated carbon. The amount of ammonia delivered to smoke from the filter cigarette containing the activated carbon with pH 3 was 45.1${\mu}g$/cig. This value was lower 23.8 % than that from the activated carbon with the pH 11.

• Geomechanics and Engineering
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• 제33권1호
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• pp.19-27
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• 2023

A series of experiments were performed to evaluate the effects of activated carbon on the compressive strength and air content of Portland Cement Concrete (PCC). Activated carbon/PCC composites were prepared by mixing concrete components with commercial activated carbon granules with weight fractions of 0, 0.5%, 1%, and 2% to cement. All PCC specimens were then tested for compressive strength on 7, 14, 21, and 28 days. The experimental results showed that adding 0.5% of activated carbon increased the compressive strength significantly over the curing periods compared to the normal PCC without activated carbon. For the specimens has 0.5% activated carbon, the 7, 14, 21, and 28-day compressive strengths increased by 28.7%, 22.2%, 26.8%, and 22.9%, respectively. However, adding excessive amounts of more than 1% activated carbon had a minimal effect on the compressive strength or even decreased it, which agrees with other studies. Regarding the air contents of the mixtures, adding activated carbon decreased the air content from 3.6% to around 1.5%. The surface morphologies of fine aggregates and activated carbon particles were compared using a novel image processing technique. The results indicated that the surface of activated carbon significantly differs from that of aggregates.