Sanky (Corryocactus brevistylus) peel as low-cost adsorbent for removal of phosphate from aqueous solutions

Eliana Contreras-López, Victor Miyashiro Kiyan, Jaime Porras Cerrón, Ana María Muñoz, Fernando Ramos-Escudero, Marcelo Portuguez-Maurtua, Ricardo Yuli-Posadas, Humberto Garayar-Tasayco

Research output: Contribution to journalArticlepeer-review

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 languageEnglish
Article number8994
JournalSustainability
Volume13
Issue number16
DOIs
StatePublished - 2 Aug 2021

Bibliographical note

Funding Information:
This research was funded by Vicerrectorado de Investigaci?n y Posgrado-Universidad Nacional Mayor de San Marcos grant number A18041891 and the APC was funded by Universidad San Ignacio de Loyola.

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

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