Evaluation of Mineral-Based Zn-Doped Hydroxyapatite as a Photocatalyst for Methylene Blue Degradation

Authors

  • Aniqa Nisrina Department of Chemistry, Faculty of Sciences and Informatics, Jenderal Achmad Yani University, Jl. Terusan Jenderal Sudirman, Cimahi Selatan, Cimahi, Jawa Barat 40513, Indonesia
  • Teguh Karya Study Program of Master of Chemistry, Faculty of Sciences and Informatics, Universitas Jenderal Achmad Yani, Cimahi, Jawa Barat 40513, Indonesia
  • Riyan Halim Study Program of Master of Chemistry, Faculty of Sciences and Informatics, Universitas Jenderal Achmad Yani, Cimahi, Jawa Barat 40513, Indonesia
  • Anceu Murniati Material and Environmental Development Center, Universitas Jenderal Achmad Yani, Cimahi, Jawa Barat 40513, Indonesia
  • Arie Hardian Material and Environmental Development Center, Universitas Jenderal Achmad Yani, Cimahi, Jawa Barat 40513, Indonesia
  • Dani Gustaman Syarif Research Center for Process Technology and Radiation, National Research and Innovation Agency (BRIN), Jl. Tamansari 71, Bandung 40132, Indonesia
  • Atiek Rostika Noviyanti Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Sumedang, Jawa Barat 45360, Indonesia
  • Jasmansyah Jasmansyah Study Program of Master of Chemistry, Faculty of Sciences and Informatics, Universitas Jenderal Achmad Yani, Cimahi, Jawa Barat 40513, Indonesia
  • Muhammad Reza Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Jember, Jember, Jawa Timur 68121, Indonesia

DOI:

https://doi.org/10.21776/ub.jpacr.2024.013.03.7908

Keywords:

photodegradation, methylene blue, hydroxyapatite, zinc, doping

Abstract

Methylene blue is a synthetic dye known to be harmful to aquatic environments. Therefore, efforts are needed to minimize methylene blue waste. This study focuses on degrading methylene blue through photocatalysis, a method chosen for its affordability and ease of use. The photocatalyst used is hydroxyapatite (HAp) derived from limestone (CaCO3) doped with zinc ions (Zn2+). This combination enhances the efficiency of breaking down dye molecules in liquid waste. The photocatalytic performance was tested under three variations: solution concentration, contact time, and pH, using an 8-watt UV lamp for specified durations. Solution absorbance was measured using a Shimadzu 1800 UV-Vis spectrophotometer. Optimal conditions for methylene blue photodegradation by Zn-doped HAp were achieved at 67.2% efficiency for 5 ppm concentration, 16.125% for 120 minutes of irradiation, and 34.86% at pH 7. Additionally, the study included an analysis of adsorption isotherm models for concentration variation and kinetic adsorption analysis for time variation. The Langmuir and Temkin adsorption isotherm models were found to be most suitable with an R2 = 1. The photodegradation kinetics model followed pseudo second-order kinetics with an R2 = 0.990.

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Published

2024-12-28

How to Cite

Evaluation of Mineral-Based Zn-Doped Hydroxyapatite as a Photocatalyst for Methylene Blue Degradation. (2024). The Journal of Pure and Applied Chemistry Research, 13(3), 146-155. https://doi.org/10.21776/ub.jpacr.2024.013.03.7908