Novel chitosan and Laponite based nanocomposite for fast removal of Cd(II), methylene blue and Congo red from aqueous solution

A series of chitosan and Laponite based nano-composite adsorbents, which showed an excellent performance for fast and efficient removal of Cd(II), methylene blue (MB) and Congo red (CR) from aqueous solution, were prepared. In the adsorbent, with the increase of Laponite component, the surface area...

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Bibliographic Details
Published in:e-Polymers 2019-01, Vol.19 (1), p.244-256
Main Authors: Xu, Guobin, Zhu, Yuejun, Wang, Xiujun, Wang, Shanshan, Cheng, Tianxiang, Ping, Rang, Cao, Jie, Lv, Kaihe
Format: Article
Language:English
Subjects:
Acetic acid
Adsorbents
Adsorption
Aqueous solutions
Chitosan
Dyes
fast adsorption
inorganic-organic hybrid
Laponite
Materials science
Methylene blue
nanocomposite
Nanocomposites
Pollutants
Polymers
wastewater treatment
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Summary:A series of chitosan and Laponite based nano-composite adsorbents, which showed an excellent performance for fast and efficient removal of Cd(II), methylene blue (MB) and Congo red (CR) from aqueous solution, were prepared. In the adsorbent, with the increase of Laponite component, the surface area increased from 44.69 m g to 64.58 m g . As a result, the adsorption rates were enhanced by increasing Laponite component. The adsorption capacities for Cd(II) and MB increased with increasing Laponite component due the cationic characteristic of two pollutants, and the opposite result was found for the removal of CR. The impacts of some factors, e.g. solution pH, temperature, pollutant concentration and salt, on the adsorption capacity were investigated. Additionally, this adsorbent could be effectively regenerated by dilute HCl solution after the adsorption of Cd(II), and the mixture of methanol and acetic acid was a suitable eluent after the adsorption of two dyes.
ISSN:2197-4586
1618-7229
DOI:10.1515/epoly-2019-0025