120th General Meeting of the KCS

Type Poster Presentation
Area Material Chemistry
Room No. Exhibition Hall 2+3
Time 10월 19일 (목요일) 11:00~12:30
Code MAT.P-398
Subject Synthesis of LTA Zeolites with Controlled Crystal Sizes for Selective Removal of Radioactive Ions
Authors Suyeon Yu, Kyungsu Na*
Department of Chemistry, Chonnam National University, Korea
Abstract LTA zeolites with various crystal sizes were synthesized by hydrothermal synthesis method, wherein various synthetic variables were carefully controlled. More specifically, effect of pH was investigated by controlling the relative ratio of tetramethylammonium hydroxide and sodium hydroxide in the synthesis gel composition. In addition, effects of aging time, synthesis time and hydrothermal temperature were also investigated profoundly. The resultant LTA zeolites were characterized with X-ray diffraction and scanning electron micrograph analyses. The results show that the variation of various synthesis parameters succeeded in the systematic control of crystal sizes between 75 nm to 2 μm with variation of size distribution. The series of LTA zeolites with controlled crystal sizes were ion-exchanged to Na+-form, which constructed LTA zeolites with aperture size of 4 Å. These zeolites were further investigated in the selective removal of radioactive ions such as Cs+ and Sr2+ from the sea water. Depending on the crystal sizes of LTA zeolites, the adsorption kinetics and quantities were changed. The details of synthesis of LTA zeolites with controlled sizes and application in pollutant removal will be addressed in this presentation.
E-mail suyeon.sue.yu@gmail.com