An EPR study of clinoptilolite from Bigadiç in Turkey
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Date
2016-01
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Elsevier
Abstract
Natural and synthetic zeolites are industrial materials. They are used in many applications as
food additives, molecular sieve to trap unwanted ingredients, as heavy metallic ions and
groups, as shielding against radiations etc. EPR spectroscopy is a tool to characterize paramagnetic centers and radicals in the zeolite and clay type minerals. In this study natural cliptonilolite obtained from a mine in Bigadiç in western Anatolia, Turkey, was studied using electron paramagnetic resonance spectroscopy (EPR) at room temperature in natural form,following treatment of the samples: adsorbing of CO2, H2S, and SO2 gases, [Cu(H2O)6]2 ions and exposure to gamma rays. Mn atoms become paramagnetic Mn2+ ions when CO2 and H2S gases are adsorbed to clinoptilolite and when SO2 gas is adsorbed the system becomes
unstable and the structure of the paramagnetic center changes with time. When Cu2+ ions are
adsorbed to the Bigadiç clinoptilolite, the values of the EPR parameters are consistent with
the distorted octahedral symmetry environment and after the exposure to gamma rays from a
Co-60 source gives O23- radical.
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Keywords
EPR -- Turkey, Bigadiç, Clinoptilolite, Klinoptilolit, Gas adsorption, Gaz adsorpsiyonu, Irradiation, Işınlama, EPR
Citation
Bıyık, R. ve Tapramaz, R. (2016). An EPR study of clinoptilolite from Bigadiç in Turkey. Microporous and Mesoporous Materials, 219(1), 38-41.