Preparation of dialdehyde cellulose graftead graphene oxide composite and its adsorption behavior for heavy metals from aqueous solution

[Display omitted] •GO-TETA-DAC was synthesized by dialdehyde cellulose grafted graphene oxide.•GO-TETA-DAC was used as adsorbent and has perfect performance for heavy metal removal.•The mechanism of synthesis and adsorption process was proposed. A novel adsorbent GO-TETA-DAC was synthesized by using...

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Bibliographic Details
Published in:Carbohydrate polymers 2019-05, Vol.212, p.345-351
Main Authors: Yao, Mingjun, Wang, Zhen, Liu, Yu, Yang, Guihua, Chen, Jiachuan
Format: Article
Language:English
Subjects:
Adsorbent
Dialdehyde cellulose
Graphene oxide
Heavy metal
Triethylenetetramine
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Summary:[Display omitted] •GO-TETA-DAC was synthesized by dialdehyde cellulose grafted graphene oxide.•GO-TETA-DAC was used as adsorbent and has perfect performance for heavy metal removal.•The mechanism of synthesis and adsorption process was proposed. A novel adsorbent GO-TETA-DAC was synthesized by using dialdehyde cellulose (DAC) grafted graphene oxide (GO) with triethylenetetramine (TETA) acted as cross-linking reagent. The product was characteristics by FT-IR, BET and SEM, results proved the preparation process was successful. GO-TETA-DAC was applied to disposal Cu (II) and Pb (II) ions from aqueous solution and achieved excellent performance. The maximum adsorption capacity 65.1 and 80.9 mg/g for Cu(II) and Pb(II) when pH was 5.0. Adsorption isotherm and kinetics revealed the adsorption process complied with Langmuir model and pseudo-second-order model. Furthermore, the reusability of GO-TETA-DAC was also explored, the adsorption efficiency can still over 77% even after four times of recycling.
ISSN:0144-8617
1879-1344
DOI:10.1016/j.carbpol.2019.02.052