Green synthesis of Xanthan gum/Methionine-bentonite nanocomposite for sequestering toxic anionic dye

Ahmad, R. and Mirza, A. (2017) Green synthesis of Xanthan gum/Methionine-bentonite nanocomposite for sequestering toxic anionic dye. Surfaces and Interfaces, 8. 65q-72. ISSN 24680230

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Abstract

The present paper deals with the synthesis of a novel and ecofriendly Xanthan gum/Methionine-bentonite (XG/Meth-bent) nanocomposite and was further explored for the removal of toxic congo red dye (85%) from aqueous solution. The nanocomposite was characterized by various techniques such as SEM, FTIR, XRD, TGA and zeta potential analysis. The surface area of bentonite and nanocomposite were found to be 23 mg2g−1 and 71 mg2g−1 respectively. The maximum adsorption was found at pH 3, contact time 60 min and temperature 323 K respectively. The point of zero charge was found to be 7. The adsorption isotherm and kinetic were best fitted by Langmuir isotherm and pseudo-second order kinetic model with Langmuir monolayer adsorption capacity 530.549 mgg−1 at 323 K. Thermodynamic studies showed that the adsorption was endothermic, spontaneous with increased randomness at solid/solution interface. Desorption with regeneration (upto fifth cycle) was best observed by NaOH.

Item Type: Article
Uncontrolled Keywords: Congo red dye; Nanocomposites; Scanning electron microscopy (SEM); Thermogravimetric analysis (TGA); X-ray diffraction (XRD)
Subjects: T Technology > T Technology (General)
Divisions: Faculties > Faculty of Engineering and Technology > Zakir Husain College of Engineering & Technology > Department of Applied Chemistry
Depositing User: AMU Library
Date Deposited: 06 Feb 2018 06:05
Last Modified: 06 Feb 2018 10:07
URI: http://ir.amu.ac.in/id/eprint/11143

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