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Removal of reactive dye using UV/TiO2 in circular type reactor
Jae-Hong Park1, Euiso Choi, Kyung-Ik Gil
1Department of Environmental System Engineering, Korea University, Seoul, Korea. jhong@korea.ac.kr
Summary
This study shows that photocatalysis using titanium dioxide (TiO2) and UV light effectively removes reactive dye Red 120. Optimal degradation occurred under acidic conditions with specific UV intensity and TiO2 dosage.
Area of Science:
- Environmental Chemistry
- Materials Science
- Chemical Engineering
Background:
- Reactive dyes pose environmental challenges due to their persistence and toxicity.
- Textile industry wastewater often contains recalcitrant organic pollutants like Red 120.
- Developing efficient methods for dye degradation is crucial for water remediation.
Purpose of the Study:
- To investigate the photocatalytic degradation of reactive dye Red 120 using TiO2 nanoparticles.
- To compare photocatalysis with photolysis and adsorption for dye removal.
- To evaluate the impact of key experimental parameters on degradation efficiency.
Main Methods:
- Photocatalytic degradation experiments were conducted in a circular reactor.
- Titanium dioxide (TiO2) was used as the photocatalyst under UV irradiation.
- Parameters studied included UV light intensity, pH, TiO2 dosage, and column configuration.
Main Results:
- Photocatalysis with UV light and TiO2 significantly outperformed photolysis or adsorption alone.
- Degradation efficiency increased linearly with UV light intensity up to 18 mW cm(-2).
- Acidic conditions and increasing TiO2 dosage (up to 1.5 g L(-1)) enhanced dye removal.
Conclusions:
- TiO2-based photocatalysis is a highly effective method for degrading reactive dye Red 120.
- Optimizing UV intensity, pH, and TiO2 dosage is essential for efficient wastewater treatment.
- This approach offers a promising solution for textile effluent remediation.