Adsorption and desorption of Methylene blue on porous Carbon monoliths and nanocrystalline cellulose

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DOIResolve DOI: http://doi.org/10.1021/am403222u
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TypeArticle
Journal titleACS Applied Materials & Interfaces
ISSN1944-8244
1944-8252
Volume5
Issue17
Pages87968804; # of pages: 9
Subjectactivated carbon; adsorption; carbon monolith; desorption; kinetics; methylene blue; nanocrystalline cellulose
AbstractThe dynamic batch adsorption of methylene blue (MB), a widely used and toxic dye, onto nanocrystalline cellulose (NCC) and crushed powder of carbon monolith (CM) was investigated using the pseudo-first- and -second-order kinetics. CM outperformed NCC with a maximum capacity of 127 mg/g compared to 101 mg/g for NCC. The Langmuir isotherm model was applicable for describing the binding data for MB on CM and NCC, indicating the homogeneous surface of these two materials. The Gibbs free energy of −15.22 kJ/mol estimated for CM unravelled the spontaneous nature of this adsorbent for MB, appreciably faster than the use of NCC (−4.47 kJ/mol). Both pH and temperature exhibited only a modest effect on the adsorption of MB onto CM. The desorption of MB from CM using acetonitrile was very effective with more than 94 % of MB desorbed from CM within 10 min to allow the reusability of this porous carbon material. In contrast, acetonitrile was less effective than ethanol in desorbing MB from NCC. The two solvents were incapable of completely desorbing MB on commercial granular coal-derived activated carbon.
Publication date
PublisherACS Publications
LanguageEnglish
AffiliationNational Research Council Canada; Aquatic and Crop Resource Development
Peer reviewedYes
NRC number55601
NPARC number21268642
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Record identifier92dadc96-875c-42db-a950-95b3cfe81f64
Record created2013-11-05
Record modified2017-03-23
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