Novel adsorbent for malachite green from okra stalks waste: synthesis, kinetics and equilibrium studies

Hakan Yildiz*, Hakki Gülşen, Ömer Şahin, Orhan Baytar, Sinan Kutluay

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


In this study, malachite green (MG) removal was performed with activated carbon synthesized from okra stalks by microwave assisted chemical activation method. In the synthesis of activated carbon, the effects of gas in the microwave, activation, and impregnation rate were investigated. The synthesized activated carbon characterization was investigated using BET, FT-IR, and SEM analyses. The activated carbon surface area achieved was 759.453 m2 g−1. In addition, the surface area of activated carbon synthesized using the conventional method was17.766 m2 g−1. The effect of the initial solution concentration on MG adsorption was investigated. According to the kinetic and equilibrium data, it was found that the adsorption process best fitted the pseudo-second order kinetic model and the Langmuir isotherm. According to the equilibrium data, the maximum adsorption capacity (q max) of the monolayer was 119.05 mg g−1. In addition, MG adsorption was investigated by the experimental design method. The adsorption capacity at the determined optimum conditions was 99.63 mg g−1. All results show that activated carbon synthesized from waste biomass by combining the conventional method with microwave-assisted impregnation is a cheap and environmentally friendly adsorbent.

Original languageEnglish
Pages (from-to)369-381
Number of pages13
JournalInternational Journal of Phytoremediation
Issue number3
Publication statusPublished - 2024

Bibliographical note

Publisher Copyright:
© 2023 Taylor & Francis Group, LLC.


Some analysis and consumables costs of this study were supported by Harran University, Turkey (HUBAP No. 21181).

FundersFunder number
Harran Üniversitesi21181


    • Activated Carbon
    • adsorption
    • microwave impregnation
    • waste biomass


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