Bio Materials and Nanotechnology: Green Tea (Waste)– Aluminium Nanoparticles (Gt-Al Nps) For Methylene Blue Adsorption

Year : 2025 | Volume : 15 | Issue : 03 | Page : 96 107
    By

    Bandari Daiva Mano Ramya,

  • Annepu Sai Charan,

  • Lenka Karthik Kumar,

  • Doddi Venkata Naga Narasimha Kesava,

  • Garugubilli Hemanth Kumar,

  • Pulipati King,

  • Meena Vangalapati,

  1. M.Tech Student, Department of Chemical Engineering, AUCE (A), Andhra University, Visakhapatnam, Andhra Pradesh, India
  2. B.Tech Student, Department of Chemical Engineering, AUCE (A), Andhra University, Visakhapatnam, Andhra Pradesh, India
  3. B.Tech Student, Department of Chemical Engineering, AUCE (A), Andhra University, Visakhapatnam, Andhra Pradesh, India
  4. B.Tech Student, Department of Chemical Engineering, AUCE (A), Andhra University, Visakhapatnam, Andhra Pradesh, India
  5. B.Tech Student, Department of Chemical Engineering, AUCE (A), Andhra University, Visakhapatnam, Andhra Pradesh, India
  6. Professor, Department of Chemical Engineering, AUCE (A), Andhra University, Visakhapatnam, Andhra Pradesh, India
  7. Professor, Department of Chemical Engineering, AUCE (A), Andhra University, Visakhapatnam, Andhra Pradesh, India

Abstract

This study examines the adsorption of Methylene Blue (MB) dye from aqueous solutions using Aluminium Nanoparticles synthesized with green tea powder as a biological reducing agent. Methylene Blue, an aromatic phenothiazine dye, is widely applied in medical diagnostics and various industrial processes, but its uncontrolled release into water bodies leads to environmental pollution due to its intense colour, stability, and potential toxicity. Therefore, identifying an efficient and eco-friendly adsorbent for Methylene Blue removal is essential. In this study, Green Tea–Aluminium (GT–Al) Nanoparticles were prepared and used as a low-cost adsorbent. The results collectively highlight the potential of GT–Al nanoparticles as a sustainable alternative to conventional chemical adsorbents. Green tea contains natural polyphenols and biomolecules that assist in reducing and stabilizing aluminium ions during nanoparticle formation. The synthesized nanoparticles were characterized using SEM, EDX, and TGA analysis to determine surface morphology, elemental composition, and thermal stability. These characterizations confirm the successful formation and stability of GT–Al nanoparticles. Adsorption experiments were performed by varying key parameters such as contact time, adsorbent dosage, pH, initial dye concentration, and temperature to determine conditions that maximize dye removal efficiency. The equilibrium data were evaluated using Langmuir, Freundlich, and Temkin isotherm models, providing insight into adsorption behavior and surface interaction mechanisms. Structural changes in the nanoparticles before and after adsorption were analyzed using FTIR spectroscopy, which helped identify functional groups participating in dye binding. The adsorption kinetics were studied using pseudo-first order and pseudo-second-order models to understand the rate of MB uptake. The dye concentration was accurately measured using a UV–Visible Spectrophotometer.

Keywords: Adsorption,Nano Particles, Isotherms, Kinetics, Thermodynamics, FTIR, Green Synthesis.

[This article belongs to Journal of Materials & Metallurgical Engineering ]

How to cite this article:
Bandari Daiva Mano Ramya, Annepu Sai Charan, Lenka Karthik Kumar, Doddi Venkata Naga Narasimha Kesava, Garugubilli Hemanth Kumar, Pulipati King, Meena Vangalapati. Bio Materials and Nanotechnology: Green Tea (Waste)– Aluminium Nanoparticles (Gt-Al Nps) For Methylene Blue Adsorption. Journal of Materials & Metallurgical Engineering. 2025; 15(03):96-107.
How to cite this URL:
Bandari Daiva Mano Ramya, Annepu Sai Charan, Lenka Karthik Kumar, Doddi Venkata Naga Narasimha Kesava, Garugubilli Hemanth Kumar, Pulipati King, Meena Vangalapati. Bio Materials and Nanotechnology: Green Tea (Waste)– Aluminium Nanoparticles (Gt-Al Nps) For Methylene Blue Adsorption. Journal of Materials & Metallurgical Engineering. 2025; 15(03):96-107. Available from: https://journals.stmjournals.com/jomme/article=2025/view=235198


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Regular Issue Subscription Original Research
Volume 15
Issue 03
Received 26/11/2025
Accepted 06/12/2025
Published 26/12/2025
Publication Time 30 Days
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