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Title: Microwave effect on ion-exchange and structure of clinoptilolite
Authors: Akdeniz, Yelda
Ülkü, Semra
Akdeniz, Yelda
Ülkü, Semra
Izmir Institute of Technology. Chemical Engineering
Keywords: Microwave irradiation
Ion exchange
Microwave treatment
X-ray diffraction
Issue Date: Mar-2007
Publisher: Springer Verlag
Source: Akdeniz, Y., and Ülkü, S. (2007). Microwave effect on ion-exchange and structure of clinoptilolite. Journal of Porous Materials, 14(1), 55-60. doi:10.1007/s10934-006-9008-z
Abstract: The effect of microwave irradiation on the ion exchange degree and structure of clinoptilolite mineral has been examined in comparison with the conventional heat treatment in waterbath. Clinoptilolite-rich mineral from the Western Anatolia, Bigadiç region was used for the experimental study. The mineral was mainly clinoptilolite (80-85%) and additionally, quartz (5-10%), and analcime+mordenite (<5%) were found as co-existing minerals. The mineral was stable towards dehydration and maintains its original structure up to 800°C. The BET and Langmuir surface areas of the sample were found to be 22 and 17m2/g for N2 adsorption and 28 and 22m2/g for Ar adsorption, respectively. For the exchange experiments, clinoptilolite rich mineral was treated with 1N NaCl salt solution both in a microwave unit and waterbath for 10min, 1h and 2h at 80°C. The waterbath treatment with the same conditions was continued for two additional weeks. The chemical composition of the parent and Na-exchanged forms of the clinoptilolite rich minerals were analyzed by using Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES). Microwave treatment was found to be more rapid and effective for ion exchange compared to conventional waterbath treatment. Additionally, the XRD results reveal that microwave irradiation has zero effect on the structure of the clinoptilolite rich mineral.
ISSN: 1380-2224
Appears in Collections:Chemical Engineering / Kimya Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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