Elsevier

Ultrasonics Sonochemistry

Volume 48, November 2018, Pages 412-417
Ultrasonics Sonochemistry

Short communication
Ultrasonic-assisted synthesis of graphene oxide – fungal hyphae: An efficient and reclaimable adsorbent for chromium(VI) removal from aqueous solution

https://doi.org/10.1016/j.ultsonch.2018.06.012Get rights and content
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Highlights

  • GO-FH bio-nanocomposite material was successfully synthesized and well characterized.

  • 97% adsorption of chromium(VI) was achieved at pH 2.0.

  • Langmuir isotherm and pseudo second order rate kinetics describe batch sorption.

  • High adsorption capacity (212.76 mg/g) in batch study.

Abstract

In this study, a hybrid film bio-nanocomposite material was developed based on the graphene oxide/fungal hyphae (GO-FH) interaction. The developed GO-FH bio-nanocomposite material was used for the removal of hexavalent chromium from aqueous solution. The GO-FH bio-nanocomposite material was prepared by ultrasonic irradiation technique. The synthesized GO-FH bio-nanocomposite material was characterized by XRD, FT-IR, SEM, TEM and TGA. The adsorption experiments were carried out in batch mode to optimize parameters such as pH, adsorbent dosage, initial Cr(VI) ion concentration, contact time and shaking speed. The results indicated that the adsorption of Cr(VI) onto GO-FH bio-nanocomposite material was pH dependant, with the maximum adsorption capacity of 212.76 mg/g occurred at pH 2.0. The adsorption studies followed, Langmuir isotherm and pseudo second order kinetic model. Findings demonstrates that GO-FH bio-nanocomposite material exhibited excellent regeneration performance.

Keywords

Graphene oxide/funal hyphae (GO-FH)
Bio-nanocomposite
Ultrasonic
Chromium(VI)
Isotherm
Kinetics

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