Journal of Shanghai University(Natural Science Edition) ›› 2013, Vol. 19 ›› Issue (4): 400-404.doi: 10.3969/j.issn.1007-2861.2013.04.013

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Adsorption Kinetics of Methylene Blue on Graphene Oxide-Chitosan Composite

XU Jing, WEN Hong-liang, OUYANG Jian-bo, WANG Ning, YANG Sheng-tao   

  1. (College of Chemistry and Environment Protection Engineering, Southwest University for Nationalities,
    Chengdu 610041, China)
  • Online:2013-08-27 Published:2013-08-27

Abstract: Graphene oxide-chitosan composite (GO-CS) is powerful in decoloration of cationic dyes. GO-CS holds several advantages including high adsorption capacity and easy separation after adsorption. This paper investigates the adsorption kinetics of methylene blue on GO-CS. The adsorption process is nicely described by a pseudo-second-order model. The diffusion mechanism includes intraparticle diffusion and surface diffusion.The adsorption capacity of GO-CS can be regulated by pH and ionic strength, where higher pH and ionic strength were preferred.

Key words: adsorption kinetics, dyeing wastewater, graphene oxide-chitosan, methylene blue

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