• Title/Summary/Keyword: Ion adsorption

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A Study on the Adsorption of Uranium(VI) Ion Using Ion Exchange Resin (이온 교환수지를 이용한 우라늄(VI) 이온의 흡착에 관한 연구)

  • 강영식;김준태
    • Journal of environmental and Sanitary engineering
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    • v.15 no.4
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    • pp.114-122
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    • 2000
  • Several new ion exchange resins have been synthesized from chloromethyl styrene-1,4-divinylbenzine with 1%, 2%, 5% and 105-crosslink and macrocyclic ligands of cryptand type by interpolymerization method. The adsorption characteristics and the pH, time, solvents and concentration dependence of the adsorption of uranium ion by this resins were studied. The resins were very stable in both acidic and basic media and have good resistance to heat at $300^{\circ}C$. The uranium ion are not adsorbed on the resins below pH 3.0, but the power of adsorption of it increased rapidly above pH 4.0. The optimum equilibrium time for adsorption of uranium ion was two hours and adsorptive power decreased in proportion to crosslink size of the resins and order of dielectric constants of solvents used and the adsorption for uranium ion was bin the order of $OdienNtn-H_4$ > $OtnNen-H_4$ > $OtnNen-H_4$ > $OenNen-H_4$.

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A Study on the Adsorption of Hg(II) Ion by Activated Carbon(1) (活性炭에 依한 Hg(II) 이온의 吸着에 관한 조사연구(1))

  • Lee, Hyun;Lee, Jong-Hang;Yun, O. Sub
    • Journal of Environmental Health Sciences
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    • v.14 no.2
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    • pp.65-71
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    • 1988
  • In this study, the method of adsorption by activated carbon in the removal of Hg(II) ion in waste water was treated. The influence of kinds of activated carbon and effect of temperature and the influence of coexistent salt on adsorption rates, the influence of pH in the adsorption, equilibrium and adsorption of mercury from activated carbon were investigated. From the adsorption on activated carbon of mercury(II) ion in the presence of cyanide or thiocyanate ion was found that mercury(II) was easily adsorved onto the activated carbon in the form of complex artion such as Hg(CN)$_4^{2-}$, Hg(SCN)$_4^{2-}$ respectively. ZnCl$_2$ activation method had a higher adsorptive ability than steam activation method in adsorption of Hg on activated carbon. Activated carbon adsorbed iodide ion is very effective on adsorption of Hg.

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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.

The Adsorption of Phosphate Son Using Hydroxyapatite synthesized by Wastewater Sludge of Semiconductor Fabrication Process (반도체 제조공정의 폐수슬러지로 합성된 Hydroxyapatite를 이용한 인산이온의 흡착)

  • 강전택;정기호;신학기
    • Journal of Environmental Science International
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    • v.11 no.3
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    • pp.257-262
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    • 2002
  • The hydroxyapatite(HAp) for the present study was prepared with the wastewater sludge from semiconductor fabrication process and it was crystallized in an electric furnace for 30 min at 90$0^{\circ}C$. The adsorption characteristics of HAp for phosphate ion in aqueous solution has been investigated. The adsorbed ratio of phosphate ion for HAp were investigated according to the reaction time, amount of HAp, concentration of standard solution, pH of solution, and influence of concomitant ions. The amount of adsorbed phosphate ion decreased with the increase of pH due to the mutual electrostatic repulsion between adsorbed phosphate ions and competitive adsorption between phosphate ion and OH- ion in aqueous solution. The maxium amount of the adsorption equilibrium for phosphate ion was about 24 mg/g of HAp. The HAp would likely to be a possible adsorbent for the removal of phosphate ion in the waste water.

Adsorption of Hg(I), Pb(II), and U(VI) ions using from Fruits of Schizandra Chinensis (오미자를 이용한 Hg(I), Pb(II), U(VI) 이온들의 흡착)

  • Kim, Kwan-Chun;Kim, Joon-Tae
    • Journal of environmental and Sanitary engineering
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    • v.22 no.1 s.63
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    • pp.29-35
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    • 2007
  • This study was examined adsorption ability of heavy metal Hg(I), Pb(II), and U(Vl) ion use of fruit from schizandra chinensis, The fruits of schizandra chinensis sample used breaking into fragments $50{\sim}100$ mesh. The sample solution was mixed fruits of schizandra chinensis and heavy metal ion. Each heavy metal ion of into solution was quantum analysis with ICP-AES. As the result, each condition of maxium adsorption ability of heavy metal ion was high in the range of pH 5-7, adsorption time was about 15 minutes, and the optimum temperature was $100^{\circ}C$. The heavy metal ion was increased adsorption in order of increasing concentration and in ethanol solution better than in aqueous solution.

Removal of Sr and Cs ions by SAN-Zeolite Beads Prepared by Immobilization of Zeolite with SAN (제올라이트를 SAN으로 고정화한 SAN-Zeolite 비드에 의한 Sr과 Cs 이온 제거)

  • Lee, Chang-Han;Kam, Sang-Kyu;Lee, Min-Gyu
    • Journal of Environmental Science International
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    • v.24 no.11
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    • pp.1331-1341
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    • 2015
  • The removal of Sr ion and Cs ion was investigated to evaluate adsorption properties by using SAN-Zeolite beads immobilized with styrene acrylonitrile (SAN). The adsorption capacities increased with the decrease of SAN/zeolite ratio (SAR) from 2.5 to 0.83. The relationship of adsorption capacity ($q_e$) and SAR was described by experimental equation such as $q_e=20.88+137.81e^{-1.96SAR}$ ($r^2=0.9980$). The adsorption kinetics of Sr ion and Cs ion with SAN-Zeolite beads were fitted well by the pseudo-second-order model. The maximum adsorption capacities of Sr ion and Cs ion calculated from Langmuir isotherm model were 66.97 mg/g and 81.97 mg/g, respectively.

Adsorption of Lead Ion by Zeolites Synthesized from Jeju Scoria (제주 스코리아로부터 합성된 제올라이트에 의한 납이온 흡착)

  • Kam, Sang-Kyu;Hyun, Sung-Su;Lee, Min-Gyu
    • Journal of Environmental Science International
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    • v.20 no.11
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    • pp.1437-1445
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    • 2011
  • The adsorption performance of lead ion was studied using five zeolites (Na-P1, sodalite (SOD), analcime (ANA), nepheline hydrate (JBW), cancrinite (CAN)) synthesized from Jeju scoria. The adsorption performances of lead ion decreased in the order of Na-P1 > SOD > ANA > JBW > CAN. These results showed that the synthetic zeolite with a higher cationic exchange capacity showed a higher adsorption performance. The uptake of lead ion by synthetic zeolites were described by Freundlich model better than Langmuir model. The adsorption kinetics of lead ion by synthetic zeolites fitted the pseudo 2nd order kinetics better than pseudo 1st order kinetics. The effective diffusion coefficients of lead ion by synthetic zeolites were ten times higher than the zeolite A synthesized from coal fly ash.

Adsorption and Desorption Characteristics of Methyl iodide on Silver ion-Exchanged Synthetic Zeolite at High Temperature

  • Park, Geun-Il;Park, Byung-Sun;Cho, Il-Hoon;Kim, Joon-Hyung;Ryu, Seung-Kon
    • Nuclear Engineering and Technology
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    • v.32 no.5
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    • pp.504-513
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    • 2000
  • The adsorption characteristics of methyl iodide generated from the simulated off-gas stream on various adsorbents such as silver ion-exchanged zeolite (AgX), zeocarbon and activated carbon were investigated. An extensive evaluation was made on the optimal silver ion-exchanged level for the effective removal of methyl iodide at temperature up to 38$0^{\circ}C$. The degree of adsorption efficiency of methyl iodide on silver ion-exchanged zeolite is strongly dependent of silver ion-amount and process temperature. The influence of temperature, methyl iodide concentration and silver ion-exchanged level on the adsorption efficiency is closely related to the pore characteristics of adsorbents. It would be facts that the effective silver ion-exchanged level was about 10 wt%, based on the degree of silver utilization for the removal of methyl iodide.

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Studies on the Adsorption of Linear Alkylbenzene Sulfonate from Waste Water by Fibrous Aminated Acrylic ion-Exchanger (아민화 아크릴계 이온교환섬유의 폐수 중 Linear Alkylbenzene Sulfonate 흡착에 관한 연구)

  • 황택성;박진원;김원종
    • Polymer(Korea)
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    • v.26 no.4
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    • pp.516-522
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    • 2002
  • The ion exchange characteristic of quaternary ammonium as functional group containing aminated acrylic fibrous ion exchanger were studied for the adsorption of linear alkylbenzene sulfonate (LAS) in a continuous ion exchange process. The adsorption capacities of aminated acrylic for LAS as the adsorption temperature were increased with increasing adsorption temperature and were equilibrated at $40^{\circ}C$. The maximum adsorption capacities as column packing ratio (L/D) were obtained at L/D>2. The adsorption capacity for LAS was increased with increasing pH and the maximum adsorption capacity as pH was obtained at pH 7. The effects of temperature and pH were similar to those of flow rate and concentration of LAS tin the breakthrough curves, the breakthrough time and slope of breakthrough corves decreased with increasing flow rate and concentration of LAS in adsorption process.

Adsorption Features of Nickel Ion on Deep Sea Manganese Nodule (심해저 망간단괴를 흡착제로 한 니켈 함유 폐수 처리에 대한 기초 연구)

  • Baek, Mi-Hwa;Shin, Myung-Sook;Kim, Dong-Su;Jung, Sun-Hee;Park, Kyoung-Ho
    • Journal of Korean Society on Water Environment
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    • v.22 no.1
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    • pp.116-121
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    • 2006
  • Fundamental investigations have been carried out to find the applicability of manganese nodule as an adsorbent of nickel ion with an intention that nickel can be secured in manganese nodule along with the treatment of wastewater. The average content of manganese in nodules which used in the experiments was about 27%. The content of nickel in manganese nodules was observed to increase up to 4 times higher with comparison to its original value after adsorption. When the initial concentration of nickel ion in artificial wastewater was lower than 500 mg/L, its adsorbed amount on manganese nodule was shown to increase continuously. However, no more than about 82 mg/L of nickel was attained at higher initial nickel ion concentration than 500 mg/L. The adsorption of nickel ion was increased with temperature under experimental conditions and as the size of manganese nodule particles became smaller more nickel ion was adsorbed on adsorbent. Regarding the effect of pH, the adsorption of nickel ion was more hindered as the solution became acidic. Adsorption behavior of nickel ion on manganese nodule was found to follow the Freundlich model well and kinetic analysis showed that the adsorption reaction of nickel ion was second order. Thermodynamic parameters for the nickel ion adsorption were estimated on the basis of thermodynamic equations and they were in good agreement with experimental results.