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Article

Comparison of Heavy Metals Removal from Aqueous Solution by Moringa oleifera Leaves and Seeds

1
Facultad de Ingeniería, Universidad Autónoma del Carmen, Ciudad del Carmen C.P. 24153, Mexico
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Departamento de Química, Instituto Nacional de Investigaciones Nucleares, A.P. 18–1027, Ciudad de México C.P. 11801, Mexico
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Department of Electronics Engineering, School of Engineering, Hellenic Mediterranean University, Chania, 73100 Crete, Greece
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Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
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Institute of Chemistry, Federal University of Rio Grande do Sul (UFRGS), Av. Bento Goncalves 9500, Postal Box 15003, 91501-970 Porto Alegre, Brazil
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Instituto de Investigaciones en Materiales, Unidad Morelia, Universidad Nacional Autónoma de México, Antigua Carretera a Pátzcuaro No. 8701, Col. Ex Hacienda de San José de la Huerta, Morelia C.P. 58190, Mexico
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Facultad de Química, Universidad Autónoma del Carmen, Calle 56 No. 4 Av. Concordia, Ciudad del Carmen, Campeche C.P. 24180, Mexico
*
Author to whom correspondence should be addressed.
Coatings 2021, 11(5), 508; https://doi.org/10.3390/coatings11050508
Received: 24 March 2021 / Revised: 17 April 2021 / Accepted: 22 April 2021 / Published: 25 April 2021
In this work, biomass obtained from seeds (S-MO) and leaves (L-MO) of the Moringa oleifera plant were used as low-cost biosorbents to remove the Pb(II), Cd(II), Co(II), and Ni(II) from aqueous solutions. The biosorption of the heavy metal ions was done using the batch technique. The effects of contact time (30–1440 min), biosorbent dosage (10–50 g/L) (0.1–0.5 g), and initial concentration of metals (10–500 mg/L) on the sorption capacity of metal ions were investigated. The S-MO and L-MO samples’ characterization was performed using pHpzc, X-ray Diffraction (XRD), and Fourier Transform Infrared Spectroscopy (FTIR). It was found that the pHpzc was notably different between the seeds and leave-derived biosorbents. The removal process’s experimental kinetic data for both S-MO and L-MO were best described by the pseudo-second-order model for all metal ions, with R2 above 0.997 in all cases. Langmuir and Freundlich’s models were also used to analyze the isotherms parameters. Based on the Langmuir model, the maximum sorption capacities (Qm) for L-MO were found as follows: L-MO-Pb > L-MO-Cd > L-MO-Co ≥ L-MO-Ni, and for S-MO, the values of Qm values presented the following order: S-MO-Pb > S-MO-Co > S-MO-Cd > S-MO-Ni. View Full-Text
Keywords: Moringa oleifera; seeds and leaves; heavy metals biosorption Moringa oleifera; seeds and leaves; heavy metals biosorption
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MDPI and ACS Style

Abatal, M.; Olguin, M.T.; Anastopoulos, I.; Giannakoudakis, D.A.; Lima, E.C.; Vargas, J.; Aguilar, C. Comparison of Heavy Metals Removal from Aqueous Solution by Moringa oleifera Leaves and Seeds. Coatings 2021, 11, 508. https://doi.org/10.3390/coatings11050508

AMA Style

Abatal M, Olguin MT, Anastopoulos I, Giannakoudakis DA, Lima EC, Vargas J, Aguilar C. Comparison of Heavy Metals Removal from Aqueous Solution by Moringa oleifera Leaves and Seeds. Coatings. 2021; 11(5):508. https://doi.org/10.3390/coatings11050508

Chicago/Turabian Style

Abatal, Mohamed, M. T. Olguin, Ioannis Anastopoulos, Dimitrios A. Giannakoudakis, Eder C. Lima, Joel Vargas, and Claudia Aguilar. 2021. "Comparison of Heavy Metals Removal from Aqueous Solution by Moringa oleifera Leaves and Seeds" Coatings 11, no. 5: 508. https://doi.org/10.3390/coatings11050508

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