Combined Homogeneous Surface Diffusion Model – Design of experiments approach to optimize dye adsorption considering both equilibrium and kinetic aspects.
Adsorption, a popular technique for removing azo dyes from aqueous streams, is influenced by several factors such as pH, initial dye concentration, temperature and adsorbent dosage. Any strategy that seeks to identify optimal conditions involving these factors, should take into account both kinetic...
| Publicado en: | Journal of Environmental Management Vol. 204; pp. 424 - 436 |
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| Autores principales: | , |
| Formato: | Artículo |
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Academic Press Inc.
Dec2017 Part 1
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ssf&AN=125570060&site=ehost-live header: @attributes: shortDbName: ssf uiTerm: 125570060 longDbName: Social Sciences Full Text (H.W. Wilson) uiTag: AN controlInfo: bkinfo: jinfo: jid: 03014797 EMJ jtl: Journal of Environmental Management issn: 03014797 maglogo: N pubinfo: dt: Dec2017 Part 1 vid: 204 pid: 735 pub: Academic Press Inc. artinfo: ui: 125570060 10.1016/j.jenvman.2017.09.010 ppf: 424 ppct: 12 formats: tig: atl: Combined Homogeneous Surface Diffusion Model – Design of experiments approach to optimize dye adsorption considering both equilibrium and kinetic aspects. aug: au: Muthukkumaran, A. Aravamudan, K. affil: Department of Chemical Engineering, Indian Institute of Technology Madras, Chennai, 600036, India su: Surface diffusion Azo dye testing Experimental design Adsorption capacity Structural optimization sug: subj: Surface diffusion Azo dye testing Experimental design Adsorption capacity Structural optimization keyword: Adsorption Azo-dye Central Composite Design (CCD) Design of experiments (DOE) Homogeneous Surface Diffusion Model (HSDM) Optimization Adsorption Azo-dye Central Composite Design (CCD) Design of experiments (DOE) Homogeneous Surface Diffusion Model (HSDM) Optimization ab: Adsorption, a popular technique for removing azo dyes from aqueous streams, is influenced by several factors such as pH, initial dye concentration, temperature and adsorbent dosage. Any strategy that seeks to identify optimal conditions involving these factors, should take into account both kinetic and equilibrium aspects since they influence rate and extent of removal by adsorption. Hence rigorous kinetics and accurate equilibrium models are required. In this work, the experimental investigations pertaining to adsorption of acid orange 10 dye (AO10) on activated carbon were carried out using Central Composite Design (CCD) strategy. The significant factors that affected adsorption were identified to be solution temperature, solution pH, adsorbent dosage and initial solution concentration. Thermodynamic analysis showed the endothermic nature of the dye adsorption process. The kinetics of adsorption has been rigorously modeled using the Homogeneous Surface Diffusion Model (HSDM) after incorporating the non-linear Freundlich adsorption isotherm. Optimization was performed for kinetic parameters (color removal time and surface diffusion coefficient) as well as the equilibrium affected response viz. percentage removal. Finally, the optimum conditions predicted were experimentally validated. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: N holdings: @attributes: islocal: N |
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