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Interaction of Turkish Beypazari lignite with I2
Affiliation:1. Department of Chemistry, Hacettepe University, 06532 Beytepe, Ankara, Turkey;2. Department of Chemical Engineering, Hacettepe University, 06532 Beytepe, Ankara, Turkey;3. Department of Physics Engineering, Hacettepe University, 06532 Beytepe, Ankara, Turkey;4. Faculty of Engineering and Natural Sciences, Sabanci University, 81474 Tuzla, Istanbul, Turkey;1. University Sidi Mohamed Ben Abdellah, Faculty of Sciences Dhar el Mahraz, Laboratory of Solid State Physics, Group of Polymers and Nanomaterials, BP 1796 Atlas, Fez 30 000, Morocco;2. UNISA Africa Chair in Nanosciences-Nanotechnology, College of Science, Engineering and Technology Science Campus, Corner of Christiaan de Wet Road & Pioneer Avenue, Florida, 1709, Johannesburg, South Africa;3. UNISA Africa Chair in Nanosciences-Nanotechnology, College of Graduate Studies, University of South Africa, Muckleneuk Ridge, P.O. Box 392, Pretoria, South Africa;4. Institut des Matériaux Jean Rouxel, Université de Nantes, 2 rue de la Houssinière, BP32229, 44322 Nantes, Cedex 3, France;1. Department of Chemical Engineering, Ningbo University of Technology, 315016, PR China;2. Hebei Key Laboratory of Applied Chemistry, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, PR China;3. Department of Chemistry, Graduate School of Science, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai 599-8531, Japan;1. Doctoral School of Molecular- and Nanotechnologies, University of Pannonia, Veszprem, Hungary;2. Nanobiosensorics Group, Institute of Technical Physics and Materials Science, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Hungary
Abstract:Samples of original and acid-washed Beypazari lignite were treated with I2 and the effects of the I2 treatment on the coal structure was investigated. It was found that I2 attachment to the coal structure obeyed Langmuir-type of adsorption model. Treatment of coals with I2 produced new iodine chemical compounds and the emergence of newly created chemical iodine structures was followed with the FTIR spectra. I2 treatment also created charge transfer complexes. Increase in the free radical concentrations of the I2-treated coals was due to the formation of charge transfer complexes between I2 and aromatic systems in the coal by single electron extraction from the donor to the I2. The splitting of aromatic stretching vibrations in the FTIR spectra of I2-treated coals towards lower wavelengths also indicated the creation of charge transfer complexes in the coals after I2 treatment where the I2 acted as the electron acceptor.
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