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Adsorption

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28-01-2016

Effects of hydrochloric acid treatment on structure characteristics and C₂H₄ adsorption capacities of Ünye bentonite from Turkey: a combined FT-IR, XRD, XRF, TG/DTA and MAS NMR study

Authors: Burcu Erdoğan Alver, Özgür Alver, Aytaç Günal, Gökhan Dikmen

Published in: Adsorption | Issue 3/2016

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Abstract

In this study, a bentonite sample from Ünye, Turkey was treated with various HCl solutions (0.1, 1.0 and 5.0 M) at 90 °C during 3 and 6 h. X-ray diffraction (XRD), X-ray fluorescence (XRF), differential thermal analysis (DTA), thermogravimetric analysis (TG), Fourier transform infrared (FT-IR), magic angle spinning nuclear magnetic resonance (²⁹Si and ²⁷Al MAS NMR) and surface area measurement methods were employed in order to investigate the structural and thermal changes occurring as a result of the acid activation. The data for the adsorption of C₂H₄ obtained at 273 K and pressures up to 100 kPa correlated with structural properties of the acid treated bentonite samples. With the increase of both concentration of acid solution and treatment time, the specific surface area values and the retentions of C₂H₄ gas of bentonite samples increased. Bentonite treated with 5.0 M HCl for 6 h adsorbed C₂H₄ most effectively.

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Title: Effects of hydrochloric acid treatment on structure characteristics and C2H4 adsorption capacities of Ünye bentonite from Turkey: a combined FT-IR, XRD, XRF, TG/DTA and MAS NMR study
Authors: Burcu Erdoğan Alver
Özgür Alver
Aytaç Günal
Gökhan Dikmen
Publication date: 28-01-2016
Publisher: Springer US
Published in: Adsorption / Issue 3/2016
Print ISSN: 0929-5607
Electronic ISSN: 1572-8757
DOI: https://doi.org/10.1007/s10450-016-9768-y

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