• Title/Summary/Keyword: 흡착율

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Removal Properties of NOx by Hybrid Anion Exchanger (복합 음이온교환 수지를 이용한 NOx 제거 특성)

  • Song, Sang-Hun;Lee, Hyung-Keun;Park, Bo-Ryeung;Hwang, Eui-Hwan;Lee, Bum-Jae;Hwang, Taek-Sung
    • Applied Chemistry for Engineering
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    • v.17 no.6
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    • pp.653-657
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    • 2006
  • The adsorption properties for $NO_{2}$ by hybrid ion exchange fiber with resins were investigated. The adsorption of $NO_{2}$ was increased with increasing of adsorption time and the initial concentration. At the initial $NO_{2}$ concentration of 900 ppm, approximately 40% of initial $NO_{2}$ was adsorbed around 20 min. And the adsorption of $NO_{2}$ was decreased with increasing of flow rate from 20 to 40 L/min. The maximum adsorbed amount of initial $NO_{2}$ was 45% at the flow rate of 10 L/min. The amount of adsorption was increased with increasing the water content.

Effect of Packing Density of ion-Exchange on the Nickel Adsorption Column in Electroplating Rinse Water (이온교환 칼럼 충진비의 변화가 도금폐수 중 니켈이온 흡착에 미치는 영향)

  • 황택성;이진혁
    • Polymer(Korea)
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    • v.26 no.5
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    • pp.551-558
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    • 2002
  • It was observed that adsorption characteristics of sulfonated fabric ion-exchanger for separating nickel ion from electroplating rinse water. Swelling ratio was increased by increasing degree of sulfonation and polarity of solvent. Ion-exchange capacity was also increased by increasing degree of sulfonation and showed 3.38 meq/g at 16% sulfonated ion-exchanger. There was little effects of pH. Adsorption equilibrium was attained within 10 min, and adsorption rate was 7.5 mg/min. Adsorption capacity was not changed after 7 cycles of regeneration process. Regeneration adsorption capacity was slightly decreased to 2.01 meq/g. It confirmed that durability of sulfonated fabric ion-exchanger was suitable for adsorption process. Adsorption equilibrium time was linearly increased by increasing L/D and adsorption capacity showed the ion exchange capacity within the range of 2.71 ∼ 3.01 meq/g in continuous process. Design of adsorption column could be possible for L/D<2. Under constant L/D condition, there is no little pH effect when rinse water is acidic solution, and operation condition of adsorption process was optimized under pH 5.

Study on Condensation and Adsorption Characteristics of Ethanolamine for Removal COD and N (COD 및 N 제거를 위한 에탄올아민의 응축 및 흡착특성 연구)

  • Kim, Jong-Young;Jeong, Eun-Sun;Ku, Hee-Kwon;Rhee, In-Hyoung;Park, Byung-Gi
    • Proceedings of the KAIS Fall Conference
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    • 2008.11a
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    • pp.415-418
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    • 2008
  • 에탄올아민 (ETA; Ethanolamine)은 에틸렌옥시드를 진한 암모니아수와 함께 가열하여 얻어지는 물질로 흡수성이 있는 무색의 액체 또는 고체이며 탄소, 질소, 산소로 이루어진 매우 안정된 유기화합물이다. 이러한 ETA는 부식방지제, 산성가스 흡수제, 화장품 등 각종 산업에서 매우 유용하게 사용되는 물질이다. 하지만 ETA는 눈, 피부, 호흡기, 폐 등에 접촉하여 호흡기 질환 및 만성 천식을 유발하고 피부에 자극을 일으키므로 ETA를 제거하기 위한 물리화학적 연구가 필요하다. 따라서 본 연구에서는 냉각온도 및 진공펌프압력에 따른 ETA 응축 특성과, 흡착제에 따른 ETA 흡착특성을 조사하였다. 조사결과 ETA는 냉각수의 온도 및 진공펌프압력에 영향을 받았으며 냉각수 온도 및 진공펌프압력이 증가할수록 응축율은 감소하였다. ETA 흡착에서 활성탄의 경우 액상의 ETA와 상호간에 흡착력은 존재하지 않았으며, 기상의 ETA는 흡착되지만, $100^{\circ}C$이상에서 탈착 반응이 일어났다. 제올라이트의 경우 액상 및 기상의 ETA를 모두 흡착하였다.

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Use of Selective Ethanol Adsorption for Ethanol Concentration (선택적 에탄올 흡착을 활용한 에탄올 농축공정개발)

  • Jin, Li-Hua;Lee, Jung-Heon
    • KSBB Journal
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    • v.25 no.5
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    • pp.466-470
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    • 2010
  • In this study, we developed simple process for ethanol concentration. We developed magnetically separable polyanilline nanofiber (PAMP) for selective ethanol adsorption. PAMP can adsorbed 80% of ethanol in the solution. After adsorption, the ethanol was recovered with simple magnetic separation and centrifugation process. After 10 times recycle of PAMP, the ethanol adsorption maintained 92% of its initial adsorption capacity. Using ethanol concentration process, the ethanol concentration increased up to 197.6 g/L from 46 g/L which was 4.3 folds increase.

흡착에 의한 농약 성분별 제거율의 변화

  • Lee, Seon-Hwa;Kim, U-Hang
    • Proceedings of the Korean Environmental Sciences Society Conference
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    • 2008.11a
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    • pp.314-317
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    • 2008
  • 본 연구에서는 백탄과 흑탄에서 농약의 제거 능력을 비교하였고, 연속 실험을 통하여 시간의 경과에 따른 농약의 제거율 변화를 평가하는 것을 목적으로 하였다. 실험에 사용된 농약은 Simazine, Diazinon, Fenitrothion, Butachlor, Malathion이다. 회분식 실험 결과에 따르면, 흑탄과 백탄 양을 0.1g, 1g, 10g, 50g씩 증가시킬수록 각 농약 성분의 제거율이 높아지는 것으로 나타났으며, 농약성분에 따른 제거율을 보면, Malathion과 Butachlor는 혹탄에서 상대적으로 잘 제거가 되는 것으로 나타났다. 하지만 Diazinon은 흑탄의 회분식 실험, 연속식 실험 모두 상대적으로 낮은 제거율을 보였다.

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키토산 분자량 변화에 따른 수중의 $Pb^{2+}$ 제거 메카니즘에 관한 연구

  • 이승원;김동석
    • Proceedings of the Korean Environmental Sciences Society Conference
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    • 2003.05a
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    • pp.297-302
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    • 2003
  • 고압증기멸균을 통해서 변형된 키토산을 FT-IR로 분석해 봤을 때, 기존의 키토산의 형태를 유지하고 있음을 알수가 있었고 분자량을 변화 시킨 키토산을 기존의 키토산과 납 흡착실험을 통해서 제거능 비교해 볼 때 15 min > 30 min > 10 min > 5min > 60 min > 0 min 순으로 나타났다 이로써 시간별로 autoclaving처리하여 분자량을 변화시킨 키토산의 제거율이 높음을 알 수가 있었다. 그 중에서도 15 min 동안 autoclaving처리하는 것이 가장 적당한 것으로 알 수가 있었다. 중금속 제거 전후의 키토산을 SAM과 TEM을 통해서 관찰해 보았다. SAM의 경우 autoclaving처리하지 않은 키토산의 표면보다는 autoclaving처리한 키토산의 표면에 보다 많은 기공이 생겨났음을 알 수 있었으며 그로 인해서 납 중금속이 보다 많이 흡착되어 있음을 알 수가 있었다. TEM의 결과로 봤을 때 높은 고압과 온도에 의해서 키토산 고유의 물결무늬가 사라졌음을 알 수가 있었다. 납 중금속이 내부에는 흡착이 이루어지지 않고 외부에 흡착이 이루어 진 것을 볼 수가 있었다.

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A Study on the Adsorptive Removal of Heavy Metals Using Inflated Vermiculites (팽창질석을 이용한 중금속 흡착제거에 관한 연구)

  • Lee, Junki;Koh, Taehoon;Kim, Sukyung;Lee, Taeyoon
    • Journal of the Korean GEO-environmental Society
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    • v.10 no.6
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    • pp.61-68
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    • 2009
  • The main objective of this study was to examine the removal of heavy metals from water by inflated vermiculites. The component of vermiculites was analyzed by XRF, and the concentration of metal ion was measured by ICP-AES. Serial batch kinetic tests and batch sorption tests were conducted to determine the removal characteristics for heavy metals in aqueous solutions. As a result, solution pH values of tests with the inflated vermiculites generally increased and then stabilized. Equilibrium pHs were generally established within 5 hrs. In addition, removal rates of inflated vermiculites were tested at the initial concentration of 3 mg/L. As a result, at equilibrium concentration, except for chromium (36.23%), Most of the heavy metals were effectively removed (96.08~98.54%). Finally, sorption data were correlated with both Langmuir and Freundlich isotherms. The Qmax obtained from Langmuir isotherm were determined to Pb $725.4mg\;kg^{-1}$, Cd $568.8mg\;kg^{-1}$, Zn $540.2mg\;kg^{-1}$, Cu $457.2mg\;kg^{-1}$ Cr $0.9mg\;kg^{-1}$ respectively. The results of the study indicate that inflated vermiculites can be properly used as an adsorbent for various heavy metals because of its outstanding removal rate.

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A study on the removal of As, Sb, Bi from the copper sulfate solutions by Ion exchange resin containing Aminophosphosphonic acid as a functional group (황산동용액(黃酸銅溶液)에서 Aminophosphosphonic acid 관능기를 가진 이온교환수지에 의한 As, Sb, Bi 제거(除去)에 관한 연구(硏究))

  • Ahn, Jae-Woo;Seo, Jae-Seong
    • Resources Recycling
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    • v.21 no.5
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    • pp.50-57
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    • 2012
  • A comparative study has been carried out on the removal of impurities such As, Sb, Bi from the copper sulfate solution by ion exchange resin containing aminophosphosphonic acid as functional group. The various parameters which affect the removal of impurities; such as the reaction temperature, the reaction time, the amount of ion-exchange resins, the concentration of sulfuric acid in electrolyte, were studied. The basic experimental results showed that about 88% of Sb & 94% of Bi can be adsorbed in these chelate resins and removed from the copper sulfate solutions but As was removed below 10% from the solutions. And the selective elution of Bi and Sb from the adsorbed ion exchange resin also can be achieved by $H_2SO_4$ or HCl solutions. The results also showed that 98.1% of Sb and 96.6% of Bi can be adsorbed from the copper sulfate solutions after 2 Bed-volume of continuous ion exchange column test.

Physical Properties of Korean Earthenware (Onggi) as Food Container (식품 보관 용기로서 옹기의 물리적 특성)

  • Seo, Gyeong-Hee;Song, Bong-Su;An, Duck-Soon;Chung, Sun-Kyung;Lee, Dong-Sun
    • KOREAN JOURNAL OF PACKAGING SCIENCE & TECHNOLOGY
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    • v.12 no.2
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    • pp.87-90
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    • 2006
  • Thermal and gas adsorption properties were measured for Korean earthenware (onggi) as a step to elucidate its role as food preserving container. Thermal conductivity and diffusivity decreased with increase in porosity while heat capacity depended on the raw soil component rather than porosity. Thermal barrier of the earthenware was generally similar to that of glass. The onggi material could sorb or adsorb a limited amount of water vapor, $CO_2$ and ethylene gases (0.0005 g/g, $17{\mu}g/g$, $2.6{\mu}g/g$, respectively). Thermal and gas adsorption properties of onggi seem to provide unique application area for use as food container and packaging.

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