Lead Sorption by Chrysanthemum indicum: Equilibrium, Kinetic, and Desorption Studies

Staroń, Paweł; Płecka, Anna; Chwastowski, Jarosław

doi:10.1007/s11270-020-04956-6

Cited by 7 publications

(2 citation statements)

References 59 publications

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“…Therefore, the pseudo-second order model was the best fit to the experimental data, presenting an R 2 of 0.9736. The fit to this model suggests that the removal mechanism is by chemisorption which implies the formation of chemical bonds between the adsorbate molecules and the adsorbent surface [30]. These results agree with studies conducted by Jeyakumar and Chandrasekaran [28] and Qaiser et al [31], who used marine green algae and Ficus religiosa leaves, respectively, for the removal of lead ions and whose data were fit to the pseudo-second order model.…”

Section: Adsorption Kineticssupporting

confidence: 87%

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Novel Application of Tagua Shell (Phytelephas aequatorialis) as Adsorbent Material for the Removal of Pb(II) Ions: Kinetics, Equilibrium, and Thermodynamics of the Process

et al. 2022

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Tagua shell is a material generated in the handcrafted jewelry industry, which is discarded since it does not have a specific use. The present study evaluates this material as an adsorbent for the removal of lead (II) in aqueous media. The adsorbent was characterized through the point of zero charge technique, X-ray microanalysis, scanning electron microscopy, and Fourier-transform infrared spectroscopy. Tests were carried out in a static system using a lead (II) solution of 100 mg·L−1 to establish the process conditions, setting a pH of 5, an adsorbent dose of 1.8 g/100 mL, and a contact time of 60 min. The kinetic study performed showed that the experimental data had a better fit with the pseudo-second order model. The experimental equilibrium data were correlated using the Langmuir, Freundlich, Toth, Redlich–Peterson, and Sips models, of which the Langmuir and Sips models proved to be the best to represent the adsorption process due to the high coefficient of determination they presented at the different temperatures, being between 0.9629–0.9899 and 0.9819–0.9900, respectively. The maximum amount of lead adsorbed was 22.0348 mg·g−1 at a temperature of 298 K. Finally, the thermodynamics study indicated that the process is endothermic, spontaneous, and thermodynamically stable.

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Section: Adsorption Kineticssupporting

confidence: 87%

“…The effect of contact time was performed with a solution of 100 mg•L −1 of Pb(II) applying the optimal w of TSH, 298 K, and pH 5, taking aliquots at times of 1,3,5,10,15,20,30,40,60, and 120 min.…”

Section: Experimental Conditions Of the Adsorption Processmentioning

confidence: 99%