• Title, Summary, Keyword: Iodide

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Sorption characteristics of iodide on chalcocite and mackinawite under pH variations in alkaline conditions

  • Park, Chung-Kyun;Park, Tae-Jin;Lee, Seung-Yeop;Lee, Jae-Kwang
    • Nuclear Engineering and Technology
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    • v.51 no.4
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    • pp.1041-1046
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    • 2019
  • In terms of long-term safety for radioactive waste disposal, the anionic iodide (I-129) with a long half-life ($1.6{\times}10^6yr$) is of a critical importance because this radionuclide migrates in geological media with limited interactions. Various studies have been performed to retard the iodide migration. Recently, some minerals that are likely generated from waste container corrosion, have been suggested to have a considerable chemical interaction with iodide. In this study, chalcocite and mackinawite were selected as candidate minerals for underground corrosion materials, and an iodide sorption experiment were carried out. The experiment was performed under anoxic and alkaline conditions and the pH effects on the iodide sorption were investigated in the range of pH 8 to 12. The results showed that both minerals demonstrated a noticeable sorption capacity on iodide, and the distribution coefficient ($K_d$) decreased as the pH increased in the experimental condition. In addition, when the alkalinity increased higher than a pH of 12, the sorption capacity of both minerals decreased dramatically, likely due to the competition of hydroxy ions with the iodide. This result confirmed that chalcocite was an especially good sorbing media for iodide under alkaline conditions with a pH value of less than 12.

Microanalysis of Metocurine Iodide in Urine and Blood by HPLC (HPLC를 이용한 뇨 및 혈액중 Metocurine Iodide의 미량분석)

  • Kim, Kyung-Nim;Lee, Jong-Pil;Kim, Hyo-Jin;Kim, Bak-Kwang
    • YAKHAK HOEJI
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    • v.38 no.4
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    • pp.379-388
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    • 1994
  • A new method for the analysis of metocurine iodide in biological fluids was developed. Metocurine iodide was quantitatively extracted with rose bengal from aqueous layer into dichloromethane layer and the amount of metocurine iodide was calculated from the amount of rose bengal which was determined by HPLC with fluorescence detector. It was possible to analyze metocurine iodide without the effect of co-prescribed drugs in the concentration range of $0.09{\sim}9.10\;{\mu}g/ml$. The detection limits of metocurine iodide in urine and blood were 0.8 and 1.2 ng at S/N=3, each respectively.

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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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The Interaction of Gallium Iodide with n-Propyl Iodide in Nitrobenzene and m-Xylene on High Vacuum (고진공 상태에서 니트로벤젠과 m-크실렌용액중 요오드화갈륨과 1-요오드화프로판과의 상호작용)

  • Kim Young Choul;Koo Deog Ja
    • Journal of the Korean Chemical Society
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    • v.35 no.4
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    • pp.301-307
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    • 1991
  • The solubilities of the n-propyl iodide in nitrobenzene and m-xylene have been measured at 8$^{\circ}$, 15$^{\circ}$ and 25$^{\circ}C$ in the presence and the absence of gallium iodide. When gallium iodide does not exist in the system, the solubility of n-propyl iodide in m-xylene is greater than in nitrobenzene, indicating a stronger interaction of n-propyl iodide with m-xylene than that with nitrobenzene. It could be thought that n-propyl iodide forms unstable complex with gallium iodide in the presence of gaillium iodide in the system. This complex has been assumed in various ways and evaluated, that instability constant (K value) is relatively certain under the assumption of 1:1 complex, n-C$_3H_7I{\cdot}GaI_3$. Therefore, the complex would form the following equilibrium in the solution: n-C$_3H_7{\cdot}GaI _3{\rightleftharpoons}n-C_3H_7I+1/2Ga_2I_6$ the instability of the complex of n-propyl iodide with gallium iodide is compared with similar complexes of gallium iodide with methyl iodide. The changes of enthalpy, free energy and entropy for the dissociation of the complex are also calculated.

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Study on Iodine Labelling (I) Influence of Reducing Agent and Iodate-$^{131}I$ in Sodium iodide-$^{131}I$ solution on Labelling

  • Kim, Jaerok
    • Nuclear Engineering and Technology
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    • v.3 no.3
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    • pp.141-147
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    • 1971
  • In iodine-131 labelling of iodocompounds such as tetrachloro-P-tetraiodo R-fluorescein, sodium orthoiodohippurate and a non-iodocompound, human serum albumin (HSA), the labelling rates and yields are accurately compared with each other. The reaction systems conducted for each compounds were different conditions: sodium iodide-$^{131}$ I containing reducing agent, sodium iodide-$^{131}$ I free from reducing agent, and sodium iodide-$^{131}$ I free from reducing agent but containing considerable amount of iodide-$^{131}$ I etc. The labelling yields were generally poor; 10% in the case of using sodium iodide-$^{131}$ I containing redoing agent, and 50~60% in the case of using sodium iodide-$^{131}$ I free from reducing agent but containing considerable amount of iodide-$^{131}$ I. However, fair yields were obtained in the case of using sodium iodide-$^{131}$ I free from reducing agent and mostly in the form of iodide-$^{131}$ I. The reaction entities involved in these reactions are also briefly discussed.

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HLPC를 이용한 뇨 및 혈액중의 Metocurine iodide의 분석

  • 김경남;김양숙;이종필;김효진;김박광
    • Proceedings of the Korean Society of Applied Pharmacology
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    • pp.296-296
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    • 1994
  • 수술시 근육 이완제로 사용되고 있는 metocurine iodide는 항생물질 투여환자, 중증 근무력중, 전해질 평형실조, 중증 신질환이 있는 환자 등에서는 작용이 증가되어서 상용량에서도 약화사고의 우려가 있어 규제가 필요한 약물이다. Metocurine iodide를 생체 시료중에서 분석하기 위해 rosebengal과 착제를 형성시켜 유기용매로 이온쌍 추출을 한 후, HPLC를 이용하여 rose bengal율 분석함으로써 metocurine iodide를 간접 정량하는 방법을 확립하였다. 이 방법은 뇨와 혈액증에 함유된 metocurine iodide를 0.09 - 9.10$\mu\textrm{g}$/m1농도에서 분석할 수 있었으며, 상관계수는 0.994 - 0.999로 양호한 직선성을 나타내었고, 동시 처방 약물의 영향은 거의 없었다. 뇨 및 혈액중 metocurine iodide의 검출 한계는 각각 0.8ng. 1.2ng (S =3)이었다.

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Studies on Chemotherapeutics for Fasciola hepatica and Eurytrema pancreaticum -The Vermicidal Effects of Hexachlorophene, Bithionol and Dithiazanine Iodide on Fasciola hepatica in Vitro- (간질(肝蛭) 및 췌질(膵蛭)의 화학적(化學的) 구제제(驅除劑)에 관(關)한 연구(硏究) -Hexachlorophene, Bithionol 및 Dithiazanine iodide의 시험관내(試驗管內)에서의 간질살충효력(肝蛭殺蟲效力)에 관(關)한 비교실험(比較實驗)-)

  • Lee, Chang Eop
    • Korean Journal of Veterinary Research
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    • v.6 no.1
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    • pp.45-52
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    • 1966
  • Hexachlorophene, Bithionol and Dithiazanine iodide were used to examine the vermicidal effect on Fasciola hepatica in vitro. A kymographic study was performed to investigate the motility of Fasciola hepatica under the influence of these drugs. Following conclusions were made: 1) With 10,000 : 1 solution; exhibited the vermicidal effect on Fasciola hepatica, Hexachlorophene in 5 minutes, Bithionol in 10 minutes, and Dithiazanine, iodide in 40 minutes, respectively. 2) With 100,000 : 1 solution; exhibited the vermicidal effect on Fasciola hepatica, Hexachlorophene in 20 minutes and Bithionol in 30minutes. In the case of Dithiazanine iodide the stimulation upon the fluke continued for 120 minutes. 3) With 1,000,000 : 1 solution; exhibited the vermicidal effect on Fasciola hepatica, Hexachlorophene in 50 minutes and Bithionol in 80 minutes. In the case of Dithiazanine iodide the stimulation upon the fluke continued for 120 minutes. 4) With 10,000,000 : 1 solution; the only Hexachlorophene showed the vermicidal effect on Fasciola hepatica. In the case of Bithionol and Dithiazanine iodide the slight stimulation upon the fluke continued for 120 minutes.

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Effects of Zinc Containing Solution on Oral Microorganisms (Zinc 수용액이 구강 미생물에 미치는 영향)

  • 이상구;김은숙;이승우
    • Journal of Oral Medicine and Pain
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    • v.23 no.4
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    • pp.343-352
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    • 1998
  • This experiment was performed to investigate effects of zinc containing solution on the major normal flora Staphylococccus aureus, Streptococus mutans and Candida albicans and to observe the variation according to anionic change and concentration difference. Zinc chloride, zinc iodide and zinc acetate solution were added to werially diluted broth culture so that each final concentration might be 0.25%, 0.5%. 1%. After that, 100ul of each aliquot was spreaded on each selective media plate( Mannitol Salts Agar plate for Staphylococcus aureus, Mitis Salivarius Agar plate for Streptococcus mutans and Sabouraud Destrose Agar plate for Candida albicans). The % killing was calculated bu CFU count after incubation under the appropriate condition. 1. zinc iodide, zinc chloride, and zinc acetate solutions showed inhibitory effects on Staphylococcus aureus, Streptococcus mutans and Candida albicans. 2. The inhibitory effects on Staphylococcus aureus were ranked in order of ainc iodide, zinc chloride and zinc actate. 3. The inhibitory effects on Streptococcus mutans were ranked in orfer of zinc iodide, zinc chloride and zinc acetate. 4. the inhibitory effects on Candida albicans showed no difference among zinc iodide, zinc chloride and zinc acetate. 5. The inhibitory effects of zinc chloride and zinc acetate on Staphylococcus aureus and Streptococcus mutnas showed increasing pattern as the concentration increase. But the inhibitory effects of zinc iodide on Staphylococcus aureus and Streptococcus mutans showed no apparent difference according to concentrations and it was the case with the inhibitory effects of zinc iodide, zinc chloride and zinc acetate on Candida albicans.

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A Study on the Removal Efficiency of a TEDA Impregnated Charcoal Bed for Methyl iodide under Humid Conditions (습윤 조건하에서 TEDA함침탄소층에 의한 Methyl Iodide 제거효율에 관한 연구)

  • Won Jin Cho;Soon Heung Chang
    • Nuclear Engineering and Technology
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    • v.16 no.3
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    • pp.161-168
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    • 1984
  • The adsorption model to predict the time dependent removal efficiency of methyl iodide by triethylenediamine (TEDA) impregnated charcoal bed under humid condition is proposed. Under humid conditions, the reduction of equilibrium adsorption capacity and effective pore diffusivity is considered. The predicted values are compared with the experimental results.

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Photo-induced Living Cationic Polymerization of Isobutyl Vinyl Ether in the presence of Diphenyliodonium iodide and Zinc iodide(II) (Diphenlyiodonium Iodide와 Zinc Iodide 존재하의 비닐 에테르의 광양이온 리빙중합(II))

  • 권순홍;전현정;이연성;마석일
    • Proceedings of the Korean Fiber Society Conference
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    • pp.223-226
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    • 2001
  • 비닐에테르류의 비닐단량체는 ZnI$_2$ 존재하에서 HI와 같은 프로톤 산에 의해 양이온 리빙중합이 가능함이 보고된 바 있는데 이 때 프로톤산은 비닐에테르 단량체와 반응하여 adduct를 생성하고, ZnI$_2$는 adduct의 양이온중합 활성화제로 작용하는 것으로 알려져 있다. (중략)

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