Date of Award
8-2025
Document Type
Thesis
Degree Name
Master of Science
Degree Discipline
Chemistry
Abstract
Heavy metal contamination in water resources presents a significant environmental and public health challenge, with lead a particular concern due to its toxicity and persistence. This study reports the green synthesis of Fe-Ti mixed oxide nanoparticles (NPs) using dextrose as a green source and investigates their effectiveness in lead removal from aqueous solutions. The synthesized NPs were characterized using XRD, FTIR, XPS, SEM-EDS, and BET analysis, revealing an amorphous structure with a high surface area (292.89 m² g¹) and mesoporous characteristics. XPS analysis confirmed the presence of mixed Fe³⁺/Fe²⁺ valence states in a Ti⁴⁺-rich framework, creating diverse binding sites for lead adsorption. The material exhibited optimal lead removal at pH 5, with adsorption following pseudo-second-order kinetics (R² > 0.99) and a Langmuir isotherm model (R² > 0.98). Maximum adsorption capacity reached 25.10 mg g⁻¹ at 40°C, showing endothermic behavior. The low point of zero charge (0.22) and surface hydroxyl groups enabled efficient lead binding may be through multiple mechanisms. Dose optimization studies established 6 g L⁻¹ as the optimal adsorbent concentration. The synergistic combination of iron's affinity for heavy metals and titanium's structural stability, coupled with environmentally friendly synthesis, resulted in a promising material for sustainable water treatment applications.
Keywords: Nanoparticles, lead, adsorption, green synthesis, dextrose, heavy metal pollution
Committee Chair/Advisor
Harshica Fernando
Committee Member
Ananda Amarasekara
Committee Member
Sameh Abdblwahed
Publisher
Prairie View A&M University
Rights
© 2021 Prairie View A & M University
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Date of Digitization
7/24/2025
Contributing Institution
J. B . Coleman Library
City of Publication
Prairie View
MIME Type
Application/PDF
Recommended Citation
Raja Hewage, S. W. (2025). Green Synthesis And Characterization Of Fe-Ti Mixed Nanoparticles For Enhanced Lead Removal From Aqueous Solutions. Retrieved from https://digitalcommons.pvamu.edu/pvamu-theses/1551