Kinetic and thermodynamics of methylene blue adsorption onto zero valent iron supported on mesoporous silica

Hameed, Atyaf Khalid and Dewayanto, Nugroho and Dongyun, Du and Nordin, Mohd Ridzuan and Ab Rahim, Mohd Hasbi (2016) Kinetic and thermodynamics of methylene blue adsorption onto zero valent iron supported on mesoporous silica. Bulletin Of Chemical Reaction Engineering And Catalysis, 11 (2). pp. 250-261. ISSN 1978-2993

Text Kinetic And Thermodynamics Of Methylene Blue Adsorption Onto Zero Valent Iron Supported On Mesoporous Silica.pdf Download (792kB)

Abstract

Zero valent iron supported on mesoporous silicanano particles (NZVI/MSNs) was prepared by the aqueous phase borohydride reduction methods. Prior to the reduction, mesoporous silica nanoparticles (MSNs) were prepared through the activation of fumed silica with concentrated HCl by refluxing at 90 °C. FTIR, XRD, FESEM, EDX and BET were used to characterize theadsorbents prepared. BET surface areas of MSNs, NZVI, and NZVI/MSNs were 126, 41, and 72 m2/g for, respectively. The performance of NZVI/MSNs as adsorbent was examined by adsorption of methylene blue (MB), performed in series of batch experiments. In the kinetic studies, pseudo first order and pseudo second order kinetic models were examined. The pseudo second order equation provided the best fit with the experimental data. Thermodynamic studies indicated that the adsorption process is endothermic with ÄH° was 90.53 kJ/mol. Positive ÄS° (300 J/mol) and negative ÄG° (-6.42 kJ/mol) was recorded, indicating the spontaneous of the adsorption process and naturally favorable.

Item Type:	Article
Uncontrolled Keywords:	Zero valent iron, Adsorption kinetics, Adsorption thermodynamics, Methylene blue, Mesoporous silica
Subjects:	T Technology > T Technology (General)
Divisions:	Faculty of Technology Management and Technopreneurship
Depositing User:	Mohd Hannif Jamaludin
Date Deposited:	27 Sep 2016 00:28
Last Modified:	17 Aug 2023 16:26
URI:	http://eprints.utem.edu.my/id/eprint/17214
Statistic Details:	View Download Statistic

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