TY - JOUR
T1 - Evaluation of orange peel (Citrus sinensis) as a source of bioactive components and its use as a bioadsorbent
AU - Maldonado, José Alfredo Hernández
AU - Aguilera, Carolina Elizabeth Ceballos
AU - Hernández, María Mercedes Salazar
AU - Arias, Alba Nelly Ardila
AU - Soto, Rosa Hernández
N1 - Publisher Copyright:
© 2021 Desalination Publications. All rights reserved.
PY - 2021/8
Y1 - 2021/8
N2 - The juices and nectars of orange produce large quantities of low-value commercial waste such as their peels. These residues have become a major environmental worry due to their high organic matter load, having a high fermentability rate, and causing serious economic and environmental problems for their disposal. However, these residues retain functional compounds such as vita-mins C, phenols, and flavonoids which are recognized for their antioxidant, anti-inflammatory and anticancer properties. The present study aims to evaluate the Cr(III) adsorption capacity in aqueous solutions using treated orange peel (OPT) as adsorbent at 15°C, 30°C and 45°C and different ratios (8 to 40 g L–1 ) of adsorbent-solution. The results show that the adsorption isotherms conform to the Sips model having the maximum adsorption capacity of 15.3 mg g–1 with 95% removal of Cr(III). It was observed that the process is endothermic and spontaneous. The adsorption kinetics of Cr(III) follows a pseudo-second-order model. Cr(III) removal using OPT was analyzed with the techniques of X-ray diffraction, Fourier-transform infrared spectroscopy, ultraviolet-visible and scanning electron microscopy images. The obtained results suggest that it is feasible to take advantage of OPT to obtain functional compounds and remove Cr(III) from aqueous solutions.
AB - The juices and nectars of orange produce large quantities of low-value commercial waste such as their peels. These residues have become a major environmental worry due to their high organic matter load, having a high fermentability rate, and causing serious economic and environmental problems for their disposal. However, these residues retain functional compounds such as vita-mins C, phenols, and flavonoids which are recognized for their antioxidant, anti-inflammatory and anticancer properties. The present study aims to evaluate the Cr(III) adsorption capacity in aqueous solutions using treated orange peel (OPT) as adsorbent at 15°C, 30°C and 45°C and different ratios (8 to 40 g L–1 ) of adsorbent-solution. The results show that the adsorption isotherms conform to the Sips model having the maximum adsorption capacity of 15.3 mg g–1 with 95% removal of Cr(III). It was observed that the process is endothermic and spontaneous. The adsorption kinetics of Cr(III) follows a pseudo-second-order model. Cr(III) removal using OPT was analyzed with the techniques of X-ray diffraction, Fourier-transform infrared spectroscopy, ultraviolet-visible and scanning electron microscopy images. The obtained results suggest that it is feasible to take advantage of OPT to obtain functional compounds and remove Cr(III) from aqueous solutions.
KW - Bioadsorption
KW - Cr
KW - Flavonoids
KW - Isotherm
KW - Kinetics
KW - Removal
KW - Treated orange peel
UR - http://www.scopus.com/inward/record.url?scp=85114175363&partnerID=8YFLogxK
U2 - 10.5004/dwt.2021.27499
DO - 10.5004/dwt.2021.27499
M3 - Artículo
AN - SCOPUS:85114175363
SN - 1944-3994
VL - 231
SP - 348
EP - 358
JO - Desalination and Water Treatment
JF - Desalination and Water Treatment
ER -