Abstract
This study aimed to evaluate the adsorption capacity of an adsorbent obtained using sanky peel for the removal of phosphate from aqueous solutions. The study was conducted in two stages: (1) adsorbent preparation considering yield, phosphate removal, adsorption capacity, and textural characteristics; (2) an assessment of the effectiveness of using sanky peel as an adsor-bent for removing phosphates from aqueous solutions. Batch adsorption was studied in aqueous solutions containing phosphate and calcium ions with the selected adsorbent. Adsorption kinetics and equilibrium isotherms were studied using mathematical models. The adsorption kinetics followed the pseudo-second-order, Elovich, and Weber–Morris models, thus demonstrating that adsorption rates were not controlled by multiple processes. Adsorption equilibrium data fitted best with the Dubinin–Radushkevich model. Finally, a Fourier transform infrared spectroscopy analysis revealed the presence of brushite spectra bands after adsorption. The results of this study can help better understand the use of sanky peel as an adsorbent and good alternative for aqueous phosphate adsorption.
| Original language | English |
|---|---|
| Article number | 8994 |
| Journal | Sustainability |
| Volume | 13 |
| Issue number | 16 |
| DOIs | |
| State | Published - 2 Aug 2021 |
Bibliographical note
Funding Information:Funding: This research was funded by Vicerrectorado de Investigación y Posgrado-Universidad Nacional Mayor de San Marcos grant number A18041891 and the APC was funded by Universidad San Ignacio de Loyola.
Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Keywords
- Adsorbent
- Isotherms
- Kinetics
- Phosphate
- Sanky peel