High-performing natural materials (Leonurus cardiaca): dye biosorption studies and statistical analysis

In this work, it was aimed to remove the highly toxic rhodamine B (RhB) dye from wastewater by using a low-cost, renewable, sustainable, and completely natural adsorbent obtained from St. John’s wort (Hypericum perforatum) (HP), which is considered an agro-waste. HP was characterized by FTIR-ATR, XRD, FESEM, and pHpzc. Adsorption experiments were conducted by optimizing pH (2–12), dose (0.01–0.30 g), time (0–120 min), and concentration (10–50 mg/L). Equilibrium data were applied to linear isotherms. The results stated that the removal process occurred in a monolayer on the homogeneous surface of HP and the $${q}_{m}$$ q m value was determined as 196.08 mg/g at 298 K. Kinetic results showed that RhB adsorption on HP followed a quasi-second-order. The effect of salt concentration onto RhB adsorption on HP adsorbent and reusability studies were conducted. Thermodynamic tests showed that the process was exothermic ($${\varDelta H}_{A}^{o}=-13.58 kJ/mol$$ Δ H A o = - 13.58 k J / m o l ) and spontaneous ($${\varDelta G}_{A}^{o}=-26.61 kJ/mol$$ Δ G A o = - 26.61 k J / m o l ). The results of the study indicated that HP may be a favorable adsorbent for basic dyes in wastewater. Graphical abstract

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Illumination of biosorption of Allura Red on Rhus coriaria L. (sumac) plant: equilibrium, kinetic, thermodynamic, and density functional theory–based analyses

Çaylak,

Çetintaş,

Çelik

et al. 2024

Biomass Conv. Bioref.

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High-performing natural materials (Leonurus cardiaca): dye biosorption studies and statistical analysis

Cited by 4 publications

References 87 publications

Valorization of pistachio bark as the biosorbent for adsorption of dye and heavy metal ions from the contaminated water

Valorization of pistachio bark as the biosorbent for adsorption of dye and heavy metal ions from the contaminated water

Adsorptive removal of hazardous rhodamine B dye from aqueous solutions by St. John’s wort (Hypericum perforatum)

Illumination of biosorption of Allura Red on Rhus coriaria L. (sumac) plant: equilibrium, kinetic, thermodynamic, and density functional theory–based analyses

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