2023
DOI: 10.15376/biores.18.3.6364-6383
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Adsorption of malachite green from aqueous phase by tea stalk powder: Parameters, kinetic, isothermal, and thermodynamic studies

Abstract: Decolorization of malachite green (MG) from the aqueous phase was investigated using tea stalk powder. The adsorption efficiency decreased with the initial MG concentration, ionic strength of the solution, and heavy metal content. A suitable initial MG concentration of up to 200 mg/L can be accepted because adsorption efficiency of more than 95% is achieved. Various adsorption kinetic models were used to fit the experimental data, and the data obtained was best explained by the pseudo second-order model. The a… Show more

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Cited by 3 publications
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“…It is a unique type of tea with a relatively high concentration of polyphenols compared to black tea and dark tea, and it has the simplest manufacturing processes. The previous studies by the authors' research group have confirmed that the used black tea, oolong tea, and tea stem may be employed as effective adsorbents for the adsorption of dyes from the aqueous phase after the treatment of the extract (Hu et al 2019;Lin et al 2020;Liu et al 2023). These tea extracts may be used as potential bioactive species for the biosynthesis of metal nanoparticles.…”
Section: Introductionmentioning
confidence: 82%
“…It is a unique type of tea with a relatively high concentration of polyphenols compared to black tea and dark tea, and it has the simplest manufacturing processes. The previous studies by the authors' research group have confirmed that the used black tea, oolong tea, and tea stem may be employed as effective adsorbents for the adsorption of dyes from the aqueous phase after the treatment of the extract (Hu et al 2019;Lin et al 2020;Liu et al 2023). These tea extracts may be used as potential bioactive species for the biosynthesis of metal nanoparticles.…”
Section: Introductionmentioning
confidence: 82%