• Title, Summary, Keyword: Activated Carbon

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A Kinetic Study on the Phosphorus Adsorption by Physical Properties of Activated Carbon (활성탄 물성에 따른 인 흡착의 동력학적 연구)

  • Seo, Jeongbeom;Kang, Joonwon
    • Journal of Korean Society on Water Environment
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    • v.26 no.3
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    • pp.491-496
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    • 2010
  • This study aimed to obtain equilibrium concentration on adsorption removal of phosphorus by activated carbon, to express the adsorption characteristics following Freundlich isotherm and also, based on the value obtained, to investigate the relationship between physical properties of activated carbon and dynamics of phosphorus removal by obtaining rate constant and effective pore diffusivity. The results summarized from this study are as follows. Phosphorus adsorption equilibrium reaching time of powdered activated carbon was reduced as the dosage of activated carbon increases, while granular activated carbon despite increased dosage did not have influence on adsorption equilibrium reaching times of phosphorus as well, taking more than 10 hours. It was also noted that powdered activated carbon showed better adsorption ability than granular activated carbon. The value of constant (f) of Freundlich isotherm of powered activated carbon on phosphorus was 4.26 which is bigger than those of granular activated carbon. The adsorption rate constant on phosphorus of powered activated carbon with low effective diameter and iodine number was highest as $8.888hr^{-1}$ and the effective pore diffusivity ($D_e$) was lowest as $2.45{\times}10^{-5}cm^2/hr$, and the value of phosphorus adsorption rate constant of granular activated carbon was $0.174{\sim}0.372hr^{-1}$, It was revealed that, with the same amount of dosage, the adsorptive power of activated carbon with lower effective diameter was better and its rate constant was also high.

A Study on the Characteristics of Pollutant Removal in Secondary Effluent from Wastewater Treatment Plant Using Silver Nanoparticles on Activated Carbon (은나노 활성탄에 의한 하수 2차 처리수 중의 오염물질 제거 특성에 관한 연구)

  • Seon, Yong-Ho
    • KSBB Journal
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    • v.29 no.5
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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.

Influence of Amine Grafting on Carbon Dioxide Adsorption Behaviors of Activated Carbons

  • Jang, Dong-Il;Park, Soo-Jin
    • Bulletin of the Korean Chemical Society
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    • v.32 no.9
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    • pp.3377-3381
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    • 2011
  • In this work, the amine grafting treated activated carbons were studied for carbon dioxide adsorbent. The surfaces of activated carbon were functionalized by 3-chloropropyltrimethoxysilane, which was subsequently grafted with amine compounds tris-(2-aminoethyl)amine and tri-ethylenetetramine and subjected to comparison. The surface functional groups of the amine grafted activated carbons were characterized using XPS. The textural properties of the amine grafted activated carbons were analyzed by $N_2$/77 K isotherms. Carbon dioxide adsorption behaviors of the amine grafted activated carbons were examined via the amounts of carbon dioxide adsorption at 298 K and 1.0 atm. From the results, tris-(2-aminoethyl)amine grafted activated carbons showed 43.8 $cm^3$/g of carbon dioxide adsorption while non-treated activated carbons and triethylenetetramine grafted activated carbons showed less carbon dioxide adsorption. These results were thought to be due to the presence of isolated amine groups in the amine compounds. Tris-(2-aminoethyl)amine grafted activated carbons have basic features that result in the enhancement of adsorption capacity of the carbon dioxide molecules, which have an acidic feature.

Physical and Mechanical Properties of Concrete Using Waste Activated Carbon (폐활성탄을 혼입한 콘크리트의 물리.역학적 성질)

  • Kang, Hyun-Soo;Sung, Chan-Yong
    • Journal of The Korean Society of Agricultural Engineers
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    • v.51 no.1
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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.

Effect of Activated Carbon on Growth of Allium tuberosum in Green House

  • Choi Seong-Kyu;Park Yeong-Tyae
    • Plant Resources
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    • v.8 no.3
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    • pp.225-229
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    • 2005
  • This study was conducted to investigate the effect of activated carbon on leave production of Allium tuberosum. Growth characteristics including plant height and leaf length were the highest when activated carbon was added with 5%, suggesting that optimum amount of activated carbon was ranged from 5 to 10%. Weight of fresh green vegetable in Allium tuberosum was low in control. And fresh weight of Allium tuberosum was higher in 5% treatment of activated carbon. However, when the plants were grown in activated carbon of $5{\sim}10%$, fresh yield of green vegetable of Allium tuberosum can be increased by using Activated Carbon. Activated carbon can be utilized as a soil conditioner in agricultural crop areas.

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Characterization and Fabrication of Chemically Activated Carbon Fibers with Various Drying Temperatures using OXI-PAN Fibers

  • Moon, Sook-Young;Lee, Byung-Ha;Lim, Yun-Soo
    • Carbon letters
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    • v.8 no.1
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    • pp.30-36
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    • 2007
  • Oxidized PAN (OXI-PAN) fibers were used for the precursors of activated carbon fiber in study. How drying temperature affected the properties of carbon fibers on activating process of carbon fibers was investigated. The specific surface areas of activated carbon fibers have been determined on a series of chemically activated carbons with KOH and NaOH. The experimental data showed variations in specific surface area, iodine and silver adsorptions by the activated carbon fibers. The amount of iodine adsorption increases with increasing specific surface areas in both activation methods. This was because the ionic radius of iodine was smaller than the interior micropore size of activated carbon fibers. Silver adsorbed well in NaOH activated carbon fibers rather than KOH activated carbon fibers in this study.

Effects of Additions of Activated Carbon on Productivity and Physico-Chemical Characteristics in Broilers (활성탄의 첨가가 육계의 생산성 및 이화학적 특성에 미치는 영향)

  • 김영직;박창일
    • Food Science of Animal Resources
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    • v.21 no.1
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    • pp.24-31
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    • 2001
  • The effects of addition of activated carbon to diet of broiler on productivity and meat quality of broilers were investigated. 48 broiler raised for six week. The addition level of activated carbon to each group was added 0, 0.6, 0.9 and 1.2%, respectively. During the experimental feeding period, weekly gain and feed intake of treatment fed diets contain 0.6 and 0.9 percent activated carbon were higher compared with those fed on control diet, though effects of diets containing graded levels of activated carbon on the feed efficiency were not found. When broilers were fed activated carbon on crude protein level of birds were higher compared with that of control diet. Also, crude fat of broilers fed diet containing activated carbon were shown to decrease compared with those fed of control diet(p<0.05). The pH from activated carbon diets was rather higher than that of control(p<0.05). The content of VBN and TBARS was not significantly different among all treatments. The heating loss has tend to decrease in activated carbon diet groups(p<0.05). The WHC tend to be increase in activated carbon diet groups(p<0.05). Blood cholesterol was no significantly different.

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Adsorption of Organic Chemical by Coconut Activated Carbon treated with Zinc Salt (아연염으로 표면처리한 활성탄에 의한 수중 유기화합물의 흡착)

  • 김영규;한진수
    • Journal of environmental and Sanitary engineering
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    • v.10 no.1
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    • pp.132-141
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    • 1995
  • The objectives of this study was to find the effect of zinc salt treated with coconut activated carbon and the effect of humic substance. The bottle- Point technique was used in determining the Freundlich isotherm equation. The adsorptive capacity of granular activated carbon was reduced when humic substance are present. Coconut activated carbon was coated with 0.0001 N zinc chloride decreased the BET surface area but increased the adsorptive capacity more than coconut activated carbon not coated with zinc chloride. The adsorptive capacity of TCE in coconut activated carbon coated with higher concentration of zinc chloride was reduced but increased in the solution containing humic substance when the coconut activated carbon was coated with 0.01 N- zinc chloride. The zinc salt coated with coconut activated carbon did not Increase the adsorptive velocity of coconut activated carbon.

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Removal of Odor- containing Sulfur Compound, Methyl Mercaptan using Modified Activated Carbon with Various Acidic Chemicals (산으로 개질된 활성탄을 이용한 메틸 메르캅탄 악취물질 제거)

  • Kim Dae Jung;Seo Seong Gyu;Kim Sang Chai
    • Journal of Korean Society for Atmospheric Environment
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    • v.21 no.2
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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.

Development of microporous activated carbon using a polymer blend technique and its behavior towards methylene blue adsorption

  • Manocha, S.;Brahmbhatt, Amit
    • Carbon letters
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    • v.12 no.2
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    • pp.85-89
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    • 2011
  • Coloured wastewater is released as a direct result of the production of dyes as well as from various other chemical industries. Many dyes and their breakdown products may be toxic for living organisms. Activated carbon is one of the best materials for removal of dyes from aqueous solutions. The present study describes the adsorption behaviour of methylene blue dye on three microporous activated carbons, where two samples (AC-1 and AC-2) were prepared by a polymer blend technique and the other is a microporous activated carbon (ARY-3) sample from viscose rayon yarn prepared by chemical-physical activation. The effects of contact time and activated carbon dosage on decolourisation capacity have been studied. The results show that activated carbon having mixed microporosity and mesoporosity show tremendous decolourisation capacity for methylene blue. In addition, the activated carbon in the powder form prepared by the polymer blend technique shows better decolourisation capacity for methylene blue than the activated rayon yarn sample.