NDLI: Removal of Pyronin B from aqueous solutions using raw and modified vermiculite

Content Provider	Springer Nature Link
Author	Toprak, Mahmut Halisdemir, Ecem
Copyright Year	2014
Abstract	The raw vermiculite was chemically modified with phosphoric acid and applied as a potential adsorbent for the removal of Pyronin B, a xanthene derivative dye, from aqueous solution. The raw VMT and phosphoric acid-modified vermiculite (P-VMT) samples were examined by XRD, FTIR, TGA, and SEM. The initial raw vermiculite (VMT) has impurities such as calcite, which is completely eliminated after modification. The results showed that the adsorption capacity of P-VMT was found to be higher than VMT. The adsorption equilibrium data were tested by the Langmuir, Freundlich, and Dubinin–Radushkevich isotherm models. The results showed that the adsorption of Pyronin B by vermiculite fitted the Freundlich isotherm well, while that exhibited by P-VMT fitted the Langmuir isotherm well. The adsorption kinetic of Pyronin B onto VMT and P-VMT was described by the pseudo-second-order model. The intra-particle diffusion model indicated that the adsorption may also be followed by multiple adsorption processes. Moreover, the thermodynamic parameters were also calculated. It was determined that the adsorption of Pyronin B on VMT and P-VMT was an endothermic and spontaneous process. The desorption of the dye on VMT and P-VMT using ethanol and methanol was also investigated primarily.
Starting Page	8289
Ending Page	8306
Page Count	18
File Format	PDF
ISSN	09226168
Journal	Research on Chemical Intermediates
Volume Number	41
Issue Number	11
e-ISSN	15685675
Language	English
Publisher	Springer Netherlands
Publisher Date	2014-12-27
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Pyronin B Vermiculite Dye Calcite Catalysis Physical Chemistry Inorganic Chemistry
Content Type	Text
Resource Type	Article
Subject	Chemistry

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