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 and Humberto Garayar-Tasayco
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Eliana Contreras-López: Grupo de Investigación Revalorización de Fuentes Naturales y Alimentos Funcionales-REVALF, Facultad de Farmacia y Bioquímica, Universidad Nacional Mayor de San Marcos, Jr. Puno 1002, Lima 15001, Peru
Victor Miyashiro Kiyan: Departamento Académico de Ingeniería Ambiental, Facultad de Ciencias, Universidad Nacional Agraria La Molina, Av. La Molina, Lima 15024, Peru
Jaime Porras Cerrón: Facultad de Economía y Planificación, Universidad Nacional Agraria La Molina, Av. La Molina, Lima 15024, Peru
Ana María Muñoz: Instituto de Ciencias de los Alimentos y Nutrición, Universidad San Ignacio de Loyola (ICAN-USIL), Campus Pachacamac, Sección B, Parcela 1, Fundo La Carolina, Pachacámac, Lima 15823, Peru
Fernando Ramos-Escudero: Instituto de Ciencias de los Alimentos y Nutrición, Universidad San Ignacio de Loyola (ICAN-USIL), Campus Pachacamac, Sección B, Parcela 1, Fundo La Carolina, Pachacámac, Lima 15823, Peru
Marcelo Portuguez-Maurtua: Facultad de Ingeniería Agrícola, Universidad Nacional Agraria La Molina, Av. La Molina, Lima 15024, Peru
Ricardo Yuli-Posadas: Facultad de Medicina, Universidad Nacional Mayor de San Marcos, Av. Grau 1075, Lima 15001, Peru
Humberto Garayar-Tasayco: Instituto de Investigación de Ciencias Sociales, Universidad Nacional de Huancavelica, Av. Agricultura 319-321, Paturpampa, Huancavelica 09001, Peru

Sustainability, 2021, vol. 13, issue 16, 1-18

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 adsorbent 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.

Keywords: sanky peel; adsorbent; phosphate; kinetics; isotherms (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
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