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Fixed-bed column studies of pentachlorophenol removal by use of alginate-encapsulated pillared clay microbeads

Graphical abstract Highlights► Pillared clays/alginate microbeads packed column prominsingly sorbed PCP from aqueous solutions. ► Operating conditions greatly influenced the column parameters. ► Introduction of surfactant in the pillared clay increases the uptake capacities. ► Thomas model predicts... Full description

Journal Title: Journal of Colloid And Interface Science 1 August 2012, Vol.379(1), pp.101-106
Main Author: Lezehari, Mouloud
Other Authors: Baudu, Michel , Bouras, Omar , Basly, Jean-Philippe
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 0021-9797 ; DOI: 10.1016/j.jcis.2012.04.054
Link: http://dx.doi.org/10.1016/j.jcis.2012.04.054
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recordid: sciversesciencedirect_elsevierS0021-9797(12)00458-4
title: Fixed-bed column studies of pentachlorophenol removal by use of alginate-encapsulated pillared clay microbeads
format: Article
creator:
  • Lezehari, Mouloud
  • Baudu, Michel
  • Bouras, Omar
  • Basly, Jean-Philippe
subjects:
  • Pillared Clays/Alginate Microbeads
  • Pentachlorophenol
  • Sorption
  • Fixed Bed
  • Breakthrough Curves
  • Thomas Model
ispartof: Journal of Colloid And Interface Science, 1 August 2012, Vol.379(1), pp.101-106
description: Graphical abstract Highlights► Pillared clays/alginate microbeads packed column prominsingly sorbed PCP from aqueous solutions. ► Operating conditions greatly influenced the column parameters. ► Introduction of surfactant in the pillared clay increases the uptake capacities. ► Thomas model predicts accurately the breakthrough curves and the column parameters. Columns were packed with two alginate/pillared clays microbeads (aluminium-pillared clay and surfactant-modified aluminium-pillared clay). Pentachlorophenol sorption performance was assessed under variable operating conditions: different bed heights, influent pentachlorophenol concentrations and flow rates. These conditions greatly influenced the breakthrough time/volume, the saturation time/volume and the uptake capacity. Higher values of experimental uptake capacities were obtained for the encapsulated surfactant-modified aluminium-pillared clay compared with the encapsulated aluminium-pillared clay, and the values were compared with those obtained with other low-cost sorbents. The experimental breakthrough curves were modelled using Bed Depth Service Time (BDST), Wolborska and Thomas models. Linear relationship was obtained for the BDST model, indicating the suitability of this model; bed capacity increased sharply with the introduction of CTAB in the inorgano-pillared clay. Wolborska model was applied only to the initial part of the curves. Thomas model was no doubt the most suitable description of the adsorption mechanisms for the entire breakthrough curves. Experimental and Thomas model-predicted equilibrium uptake capacities were in accordance.
language: eng
source:
identifier: ISSN: 0021-9797 ; DOI: 10.1016/j.jcis.2012.04.054
fulltext: fulltext
issn:
  • 00219797
  • 0021-9797
url: Link


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titleFixed-bed column studies of pentachlorophenol removal by use of alginate-encapsulated pillared clay microbeads
creatorLezehari, Mouloud ; Baudu, Michel ; Bouras, Omar ; Basly, Jean-Philippe
ispartofJournal of Colloid And Interface Science, 1 August 2012, Vol.379(1), pp.101-106
identifierISSN: 0021-9797 ; DOI: 10.1016/j.jcis.2012.04.054
subjectPillared Clays/Alginate Microbeads ; Pentachlorophenol ; Sorption ; Fixed Bed ; Breakthrough Curves ; Thomas Model
descriptionGraphical abstract Highlights► Pillared clays/alginate microbeads packed column prominsingly sorbed PCP from aqueous solutions. ► Operating conditions greatly influenced the column parameters. ► Introduction of surfactant in the pillared clay increases the uptake capacities. ► Thomas model predicts accurately the breakthrough curves and the column parameters. Columns were packed with two alginate/pillared clays microbeads (aluminium-pillared clay and surfactant-modified aluminium-pillared clay). Pentachlorophenol sorption performance was assessed under variable operating conditions: different bed heights, influent pentachlorophenol concentrations and flow rates. These conditions greatly influenced the breakthrough time/volume, the saturation time/volume and the uptake capacity. Higher values of experimental uptake capacities were obtained for the encapsulated surfactant-modified aluminium-pillared clay compared with the encapsulated aluminium-pillared clay, and the values were compared with those obtained with other low-cost sorbents. The experimental breakthrough curves were modelled using Bed Depth Service Time (BDST), Wolborska and Thomas models. Linear relationship was obtained for the BDST model, indicating the suitability of this model; bed capacity increased sharply with the introduction of CTAB in the inorgano-pillared clay. Wolborska model was applied only to the initial part of the curves. Thomas model was no doubt the most suitable description of the adsorption mechanisms for the entire breakthrough curves. Experimental and Thomas model-predicted equilibrium uptake capacities were in accordance.
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descriptionGraphical abstract Highlights► Pillared clays/alginate microbeads packed column prominsingly sorbed PCP from aqueous solutions. ► Operating conditions greatly influenced the column parameters. ► Introduction of surfactant in the pillared clay increases the uptake capacities. ► Thomas model predicts accurately the breakthrough curves and the column parameters. Columns were packed with two alginate/pillared clays microbeads (aluminium-pillared clay and surfactant-modified aluminium-pillared clay). Pentachlorophenol sorption performance was assessed under variable operating conditions: different bed heights, influent pentachlorophenol concentrations and flow rates. These conditions greatly influenced the breakthrough time/volume, the saturation time/volume and the uptake capacity. Higher values of experimental uptake capacities were obtained for the encapsulated surfactant-modified aluminium-pillared clay compared with the encapsulated aluminium-pillared clay, and the values were compared with those obtained with other low-cost sorbents. The experimental breakthrough curves were modelled using Bed Depth Service Time (BDST), Wolborska and Thomas models. Linear relationship was obtained for the BDST model, indicating the suitability of this model; bed capacity increased sharply with the introduction of CTAB in the inorgano-pillared clay. Wolborska model was applied only to the initial part of the curves. Thomas model was no doubt the most suitable description of the adsorption mechanisms for the entire breakthrough curves. Experimental and Thomas model-predicted equilibrium uptake capacities were in accordance.
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abstractGraphical abstract Highlights► Pillared clays/alginate microbeads packed column prominsingly sorbed PCP from aqueous solutions. ► Operating conditions greatly influenced the column parameters. ► Introduction of surfactant in the pillared clay increases the uptake capacities. ► Thomas model predicts accurately the breakthrough curves and the column parameters. Columns were packed with two alginate/pillared clays microbeads (aluminium-pillared clay and surfactant-modified aluminium-pillared clay). Pentachlorophenol sorption performance was assessed under variable operating conditions: different bed heights, influent pentachlorophenol concentrations and flow rates. These conditions greatly influenced the breakthrough time/volume, the saturation time/volume and the uptake capacity. Higher values of experimental uptake capacities were obtained for the encapsulated surfactant-modified aluminium-pillared clay compared with the encapsulated aluminium-pillared clay, and the values were compared with those obtained with other low-cost sorbents. The experimental breakthrough curves were modelled using Bed Depth Service Time (BDST), Wolborska and Thomas models. Linear relationship was obtained for the BDST model, indicating the suitability of this model; bed capacity increased sharply with the introduction of CTAB in the inorgano-pillared clay. Wolborska model was applied only to the initial part of the curves. Thomas model was no doubt the most suitable description of the adsorption mechanisms for the entire breakthrough curves. Experimental and Thomas model-predicted equilibrium uptake capacities were in accordance.
pubElsevier Inc.
doi10.1016/j.jcis.2012.04.054
eissn10957103
date2012-08-01