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Application of the graphene oxide/chitosan nanocomposite in the removal of methyl orange from aqueous solutions: a mechanism study

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Title Application of the graphene oxide/chitosan nanocomposite in the removal of methyl orange from aqueous solutions: a mechanism study
 
Creator Azadfar, Mina
Tahermansouri, Hasan
Qomi, Mahnaz
 
Subject Adsorption isotherms
Desorption
Graphene oxide
Chitosan
Methyl orange
Thermodynamic
 
Description 209-219
Graphene oxide (GO) and the functionalized graphene oxide with chitosan (GO-C) has been used for the removal of methyl orange from aqueous solutions. Batch experiments such as solution pH, amount of adsorbents, contact time, concentration of the methyl orange and temperature are carried out to study the sorption process. Kinetic studies are well described by pseudo-second-order kinetic model for both adsorbents. Isotherm studies have shown that Langmuir isotherm for GO and GO-C are the best to represent the measured sorption data. Negative ∆G◦ values indicate the nature of spontaneous adsorption process. Physical sorption is suggested for the adsorption process. In addition, methyl orange molecules can be desorbed from GO-C up to 79.2% at pH =11 and that the consumed GO-C can be reutilized up to 5th cycle of regeneration.
 
Date 2021-02-11T06:11:32Z
2021-02-11T06:11:32Z
2021-02
 
Type Article
 
Identifier 0975-0975(Online); 0376-4710(Print)
http://nopr.niscair.res.in/handle/123456789/56200
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJC-A Vol.60A(02) [February 2021]