• Title/Summary/Keyword: 합성 제올라이트

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Separation Behavior of Cs and Sr on the Various Zeolites (각종 제올라이트계에서의 Cs 및 Sr 분리특성)

  • Lee, Eil-Hee;Lee, Won-Kyung;Yoo, Jae-Hyung;Park, Hyun-Soo
    • Applied Chemistry for Engineering
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    • v.4 no.4
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    • pp.731-738
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    • 1993

  • This study showed the adsorption behavior of Cs and Sr into the inorganic ion-exchanger zeolites such as 4A, 13X, AW300, AW500 and natural. It was found that the best type of zeolite is AW500 for Cs and 13X for Sr in terms of ion-exchange capacity. The temperature effect was also examined for the following systems : AW500-Cs, AW300-Cs, natural zeolite-Cs, 4A-Sr and 13X-Sr. Experiments showed that the effect of temperature on the ion-exchange capacity is negligible in all cases except for the systems of 4A-Sr and natural zeolite-Cs. The enhancement in the ion-exchange capacity for 4A-Sr would be caused by the Sr ion movement and the multilayer adsorption due to the heterogeneous characteristics of ion-exchange site. The distribution coefficient was increased with pH of the solution which is in equilibrium with zeolite particles. The values of $K_d$ in the systems of AW500-Cs and 4A-Sr were found to be about $10^3cm^3/g$ and $10^3{\sim}10^4cm^3/g$ respectively.

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Fabrication of Calcined Clay Granule Comprising Zeolite (제올라이트를 함유하는 소성점토의 제조)

  • Kim, Byoung-Gon;Lee, Gye-Seung;Park, Chong-Lyuck;Jeon, Ho-Seok;Jeong, Soo-Bok
    • Korean Journal of Soil Science and Fertilizer
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    • v.41 no.4
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    • pp.239-246
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    • 2008

  • This research tried to find out the optimum fabrication method of calcined clay granules comprising zeolite. Kaolin clay and natural zeolite powder were used as raw materials of calcined clay, and silica stone powder was used for controlling the porosity of the granules. The granulation was performed with two kinds of granulators: a pan granulator and a high-shear mixer granulator. Various granules were fabricated by the mixing ratios and the rotation speeds of the granulators, and were heated from 400 to $700^{\circ}C$ at $100^{\circ}C$ interval. The crushing strength, pore size distribution, and CEC of the granules were measured. The evaluation method for the resistance of granules to human treading was created and the tests were conducted at dry and wet conditions. The resistance and crushing strength improved in proportion to the rotation speed of the granulator and the heating temperature, but the CEC decreased. The pellet made by the pan granulator did not have the strength against treading upon heating to below $700^{\circ}C$, but the pellet made by the high-shear mixer granulator endured the treading test upon heating to over $500^{\circ}C$

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