Evaluation of LED Lamp and Mercury Vapor Lamp in the Photocatalytic Degradation of Methylene Blue and Methyl Orange

Abstract

Methylene Blue (MB) and Methyl Orange (MO) are synthetic dyes widely used in industries such as textiles, paper, leather, and clothing. Owing to their toxicity and resistance to biological degradation, these dyes pose serious environmental and health risks. Photocatalysis-based advanced oxidation processes have recently attracted attention as effective methods for wastewater treatment, enabling the degradation of organic dyes under natural or artificial light. In this study, nickel oxide (NiO) nanoparticles are shown to be efficient photocatalysts for converting MB and MO into non-toxic products. Photocatalytic efficiency, reaction kinetics, half-life, and degradation yields were evaluated using LED and mercury vapor (MV) lamps. The results demonstrate that the light source significantly influences degradation performance, emphasizing the importance of appropriate light selection for optimal photocatalytic activity.

Keywords

• LED lamp
• Mercury vapor lamp
• Photocatalysis
• Methylene blue
• Methyl orange

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