Competitive Adsorption between Polyethylene Glycol and Acid Brilliant Red on Expanded Graphite

Expanded graphite (EG) adsorbent was prepared with graphite as raw materials, potassium permanganate as oxidant, and vitriol as intercalation compound. Polyethylene glycol (PEG) 10000 and Acid brilliant red 3B (ABR) with obvious difference in molecular weights were selected as organic adsorbates, an...

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Main Authors: Xiu-Yan Pang, Li-Li Zhang
Format: Article
Language:English
Published: Hindawi Limited 2012-01-01
Series:E-Journal of Chemistry
Online Access:http://dx.doi.org/10.1155/2012/307561
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author Xiu-Yan Pang
Li-Li Zhang
author_facet Xiu-Yan Pang
Li-Li Zhang
author_sort Xiu-Yan Pang
collection DOAJ
description Expanded graphite (EG) adsorbent was prepared with graphite as raw materials, potassium permanganate as oxidant, and vitriol as intercalation compound. Polyethylene glycol (PEG) 10000 and Acid brilliant red 3B (ABR) with obvious difference in molecular weights were selected as organic adsorbates, and their adsorption and competitive adsorption thermodynamics and kinetics on EG were investigated. The results are: In both single component system and dual component system, the adsorption and competitive adsorption isotherm of PEG 10000 and ABR on EG are all type I. In dual component system, the existence of another component would decrease the single component adsorbance, which might be caused by the competitive adsorption of these adsorbates for the same adsorbing site on EG. Adsorption and competitive adsorption are spontaneous, and the increase of ionic strength, temperature and expanded volume of the adsorbent would cause the increase of adsorbance. No matter the single component system or the dual component system, the adsorption kinetics models can all be well described with pseudo second-order model. Adsorption rate increases with the increase of temperature. Physical adsorption is the main action between EG with these adsorbates.
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spelling doaj.art-e320d510929f41acb9b222cae4dc914d2022-12-22T03:58:07ZengHindawi LimitedE-Journal of Chemistry0973-49452090-98102012-01-019283985010.1155/2012/307561Competitive Adsorption between Polyethylene Glycol and Acid Brilliant Red on Expanded GraphiteXiu-Yan Pang0Li-Li Zhang1College of Chemistry and Environmental Science, Hebei University, Baoding 071002, ChinaCollege of Chemistry and Environmental Science, Hebei University, Baoding 071002, ChinaExpanded graphite (EG) adsorbent was prepared with graphite as raw materials, potassium permanganate as oxidant, and vitriol as intercalation compound. Polyethylene glycol (PEG) 10000 and Acid brilliant red 3B (ABR) with obvious difference in molecular weights were selected as organic adsorbates, and their adsorption and competitive adsorption thermodynamics and kinetics on EG were investigated. The results are: In both single component system and dual component system, the adsorption and competitive adsorption isotherm of PEG 10000 and ABR on EG are all type I. In dual component system, the existence of another component would decrease the single component adsorbance, which might be caused by the competitive adsorption of these adsorbates for the same adsorbing site on EG. Adsorption and competitive adsorption are spontaneous, and the increase of ionic strength, temperature and expanded volume of the adsorbent would cause the increase of adsorbance. No matter the single component system or the dual component system, the adsorption kinetics models can all be well described with pseudo second-order model. Adsorption rate increases with the increase of temperature. Physical adsorption is the main action between EG with these adsorbates.http://dx.doi.org/10.1155/2012/307561
spellingShingle Xiu-Yan Pang
Li-Li Zhang
Competitive Adsorption between Polyethylene Glycol and Acid Brilliant Red on Expanded Graphite
E-Journal of Chemistry
title Competitive Adsorption between Polyethylene Glycol and Acid Brilliant Red on Expanded Graphite
title_full Competitive Adsorption between Polyethylene Glycol and Acid Brilliant Red on Expanded Graphite
title_fullStr Competitive Adsorption between Polyethylene Glycol and Acid Brilliant Red on Expanded Graphite
title_full_unstemmed Competitive Adsorption between Polyethylene Glycol and Acid Brilliant Red on Expanded Graphite
title_short Competitive Adsorption between Polyethylene Glycol and Acid Brilliant Red on Expanded Graphite
title_sort competitive adsorption between polyethylene glycol and acid brilliant red on expanded graphite
url http://dx.doi.org/10.1155/2012/307561
work_keys_str_mv AT xiuyanpang competitiveadsorptionbetweenpolyethyleneglycolandacidbrilliantredonexpandedgraphite
AT lilizhang competitiveadsorptionbetweenpolyethyleneglycolandacidbrilliantredonexpandedgraphite