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Removing Paraquat and Nile blue from aqueous solution using double-oxidized graphene oxide coated by polydopamine nanocomposite

  • N. Alipour
  • H. Namazi
Original Paper

Abstract

Azo dyes and herbicides are significant environmental contaminants which are characterized by the presence of one or more azo bonds (−N=N−) and aromatic species in their structure. The aim of present work is to use inexpensive and environmentally friendly nanocomposite as an adsorbent. Double-oxidized graphene oxide (GO) sheets are coated by polydopamine to adsorb the studied pollutants Nile blue (NB) and Paraquat (PQ) from wastewater. Characterizations of the synthesized GO coated with polydopamine were investigated by several techniques such as FT-IR, FE-SEM, XRD, adsorption isotherm. The effect of solution initial pH, initial concentration, and contact time was investigated. Results indicate that adsorption capacity in ambient temperature could reach 131.58, 101.01 mg/g for Nile blue and Paraquat, respectively. The efficiency of Langmuir isotherm model for these pollutants was acquired from the equilibrium adsorption data. Indeed, based on the experimental results, the possible adsorption mechanism was also suggested.

Keywords

Polydopamine Double-oxidized graphene oxide Nile blue Paraquat Nanocomposite Adsorbent 

Notes

Acknowledgements

Authors gratefully acknowledge the financial supports from the University of Tabriz and Research Center for Pharmaceutical Nanotechnology (RCPN) of Tabriz University of Medical Science.

Supplementary material

13762_2018_1697_MOESM1_ESM.docx (81 kb)
Supplementary material 1 (DOCX 80 kb)

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Copyright information

© Islamic Azad University (IAU) 2018

Authors and Affiliations

  1. 1.Laboratory of Dendrimers and Nano-Biopolymers, Faculty of ChemistryUniversity of TabrizTabrizIran
  2. 2.Research Center for Pharmaceutical Nanotechnology (RCPN)Tabriz University of Medical ScienceTabrizIran

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