The Effectiveness of Magnetite Modified Gallic Acid Synthesized by Sonochemical Method As AuCl4- Adsorbent-Reductor

  • Maya Rahmayanti Department of Chemistry, State Islamic University of Sunan Kalijaga, Jl. Marsda Adi Sucipto Yogyakarta, Indonesia
  • Sri Juari Santosa Department of Chemistry, Universitas Gadjah Mada, Jl. Sekip Utara, Yogyakarta 55281, Indonesia
  • Sutarno Sutarno Department of Chemistry, Universitas Gadjah Mada, Jl. Sekip Utara, Yogyakarta 55281, Indonesia
  • Astuti Paweni Department of Chemistry, State Islamic University of Sunan Kalijaga, Jl. Marsda Adi Sucipto Yogyakarta, Indonesia
DOI: https://doi.org/10.30598//ijcr.2021.8-may
Keywords: Gallic acid, adsorption, kinetic, isotherm, effectiveness

Abstract

In recent years gallic acid has been developed as an AuCl4- adsorbent-reducing agent. In this research, gallic acid was modified with magnetite by sonochemical method (GA-Fe3O4), and its effectiveness as an AuCl4- adsorbent was studied. GA-Fe3O4 was synthesized through one-stage (GA-Fe3O4-SK1) and two-stage (GA-Fe3O4-SK2) methods. The effectiveness of GA-Fe3O4 was studied through optimization studies on pH, time, kinetics, and isotherm adsorption of AuCl4-. The adsorption method used was the batch method in the pH range 2-7. While the kinetics model used was the Lagergren and Ho kinetics model. The adsorption isotherm model used was the Freundlich and Langmuir isotherm model. The results showed that the optimum pH conditions for adsorption of AuCl4- on GA-Fe3O4 occurred at pH 3. Adsorption of AuCl4- on GA-Fe3O4-SK1 and GA-Fe3O4-SK2 both followed the Ho kinetic model, while the adsorption isotherm followed the Freundlich isotherm model with values KF were 0.041 and 0.034 mol/g respectively.

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Published
2021-01-31
How to Cite
(1)
Rahmayanti, M.; Santosa, S.; Sutarno, S.; Paweni, A. The Effectiveness of Magnetite Modified Gallic Acid Synthesized by Sonochemical Method As AuCl4- Adsorbent-Reductor. Indo. J. Chem. Res. 2021, 8, 194-201.
Issue
Vol 8 No 3 (2021): Edition for January 2021
Section
Research articles

Copyright (c) 2021 Maya Rahmayanti, Sri Juari Santosa, Sutarno Sutarno, Astuti Paweni

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