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VOL. 12, ISSUE 12 (2025)
Adsorption of lead (II) Ions onto Mangifera Indica (Mango) peel: Removal from aqueous lead nitrate solutions
Authors
Moronkola, Bridget Adekemi, Alegbe, Monday John, Oyewole, Toyib, Dosumu, Olufemi Micheal, Idris, Kehinde Olusegun
Abstract
Lead contamination in water represents a serious environmental and
public health hazard due to its persistence, bioaccumulation, and chronic
toxicity. This study explored the potential of mango (Mangifera indica)
peels as an inexpensive and environmentally sustainable adsorbent for the
removal of Pb²⁺ ions from aqueous lead nitrate solutions. The mango peels were
pretreated, characterized, and analyzed using several analytical techniques,
including Fourier Transform Infrared Spectroscopy (FTIR), X-ray Diffraction
(XRD), Thermogravimetric Analysis (TGA), and Brunauer-Emmett-Teller (BET)
surface analysis. Elemental composition analysis indicated that mango peel
primarily consists of carbon (75.70%) and nitrogen (19.70%), signifying its
strong organic content suitable for metal adsorption. FTIR analysis identified
various functional groups contributing to lead ion binding, including a band at
1000 cm⁻¹ attributed to amine groups, a distinct peak near 500 cm⁻¹
corresponding to C–H bending vibrations, a band at 1620 cm⁻¹ associated with
N–H stretching, and a broad absorption around 3200 cm⁻¹ representing O–H
stretching. Post-adsorption spectra exhibited noticeable changes, including a
broad O–H peak around 3500 cm⁻¹ and sharp bands at 1000 cm⁻¹ and 1700 cm⁻¹
corresponding to C–H and C=O stretching, respectively, indicating strong
chemical interactions between Pb²⁺ ions and surface functional groups. XRD
patterns confirmed an amorphous structural nature conducive to adsorption,
while TGA results demonstrated thermal stability of the material under
experimental conditions. Batch adsorption experiments revealed that adsorbent
dosage significantly influenced removal efficiency, with optimal performance
achieved at 2.0 g, corresponding to approximately 90% lead removal. These
findings highlight mango peels as a readily available, biodegradable, and
highly effective adsorbent for mitigating heavy metal contamination in water,
offering a cost-efficient and sustainable alternative for wastewater treatment
applications.
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Pages:62-66
How to cite this article:
Moronkola, Bridget Adekemi, Alegbe, Monday John, Oyewole, Toyib, Dosumu, Olufemi Micheal, Idris, Kehinde Olusegun "Adsorption of lead (II) Ions onto <i>Mangifera Indica</i> (Mango) peel: Removal from aqueous lead nitrate solutions". International Journal of Multidisciplinary Research and Development, Vol 12, Issue 12, 2025, Pages 62-66
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