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Liquid phase adsorption kinetics and equilibrium of toluene by novel modified-diatomite

Sheshdeh, Reza Khalighi, Abbasizadeh, Saeed, Nikou, Mohammad Reza Khosravi, Badii, Khashayar and Sharafi, Mohammad Sadegh 2014, Liquid phase adsorption kinetics and equilibrium of toluene by novel modified-diatomite, Journal of environmental health science and engineering, vol. 12, pp. 148-161, doi: 10.1186/s40201-014-0148-9.

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Title Liquid phase adsorption kinetics and equilibrium of toluene by novel modified-diatomite
Author(s) Sheshdeh, Reza Khalighi
Abbasizadeh, Saeed
Nikou, Mohammad Reza Khosravi
Badii, Khashayar
Sharafi, Mohammad Sadegh
Journal name Journal of environmental health science and engineering
Volume number 12
Start page 148
End page 161
Total pages 13
Publisher BioMed Central
Place of publication London, Eng.
Publication date 2014-12
ISSN 2052-336X
Keyword(s) diatomite
adsorption
toluene
isotherm
kinetics
Summary The adsorption equilibria of toluene from aqueous solutions on natural and modified diatomite were examined at different operation parameters such as pH, contact time, initial toluene concentration was evaluated and optimum experimental conditions were identified. The surface area and morphology of the nanoparticles were characterized by SEM, BET, XRD, FTIR and EDX analysis. It was found that in order to obtain the highest possible removal of toluene, the experiments can be carried out at pH 6, temperature 25°C, an agitation speed of 200 rpm, an initial toluene concentration of 150 mg/L, a centrifugal rate of 4000 rpm, adsorbent dosage = 0.1 g and a process time of 90 min. The results of this work show that the maximum percentage removal of toluene from aqueous solution in the optimum conditions for NONMD was 96.91% (145.36 mg/g). Furthermore, under same conditions, the maximum adsorption of natural diatomite was 71.45% (107.18 mg/g). Both adsorption kinetic and isotherm experiments were carried out. The experimental data showed that the adsorption follows the Langmuir model and Freundlich model on natural and modified diatomite respectively. The kinetics results were found to conform well to pseudo-second order kinetics model with good correlation. Thus, this study demonstrated that the modified diatomite could be used as potential adsorbent for removal of toluene from aqueous solution.
Language eng
DOI 10.1186/s40201-014-0148-9
Field of Research 030101 Analytical Spectrometry
030108 Separation Science
030207 Transition Metal Chemistry
030599 Organic Chemistry not elsewhere classified
090409 Wastewater Treatment Processes
090703 Environmental Technologies
100708 Nanomaterials
Socio Economic Objective 860604 Organic Industrial Chemicals (excl. Resins
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2014, The Authors
Free to Read? Yes
Use Rights Creative Commons Attribution licence
Persistent URL http://hdl.handle.net/10536/DRO/DU:30085190

Document type: Journal Article
Collections: Institute for Frontier Materials
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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.