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하동고령토로 합성한 제올라이트 A의 2가 양이온 교환성

The Divalent Ion-Exchange Properties of Synthetic Zeolite A from Kaolin

HWAHAK KONGHAK, October 1982, 20(5), 393-400(8), NONE
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Abstract

경상남도 하동산 담홍색 고령토를 수산화나트륨수용액과 반응시켜 제올라이트 A를 합성하여 이의 Pb+2, Cu+2, Zn+2, Co+2, Ni+2, Cd+2, Ca+2, Mg+2, Ba+2의 이온교환성, 이온교환선택성 및 이온교환 표준 Gibbs 자유에너지를 조사하였다.
결정이 덜 형성된 제올라이트 A의 이온교환성은 결정이 완성된 제올라이트 A의 이온교환성과 차이점이 없음을 알았다.
이온교환등온선 및 이온교환 표준 Gibbs 자유에너지값들로부터 이온교환선택성은 Pb+2> Cu+2>Ba+2>Zn+2>Ca+2>Cd+2>Co+2>Ni+2>Mg+2 이온 순서임을 알았다.
Synthetic zeolite A was prepared by reacting domestic Hadong kaolin with sodium hydroxide solution, and its ion exchange properties, selectivities and standard Gibbs free energies were studied for lead, supric, zinc, cobalt, nickel, cadmium, calcium, magnesium, and barium ion.
It was observed that ion exchange capacities for incomplete crystalline zeolitze A were equivalent to these of complete crystalline zeolite A.
The selectivity series obtained from ion exchange isotherms and ion exchange standard Gibbs free energies were found to be Pb++>Cu++>Ba++>Zn++>Ca++>Cd++>Co++>Ni++>Mg++.

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