Related Experiment Video
Updated: Jul 6, 2026
04:48
Rose Bengal-Mediated Photodynamic Therapy to Inhibit Candida albicans
Published on: March 24, 2022
Photolytic decolorization of Rose Bengal by UV/H(2)O(2) and data optimization using response surface method
M A Rauf1, N Marzouki, Bahadir K Körbahti
1Department of Chemistry, UAE University, P.O. Box 17551, Al-Ain, United Arab Emirates. raufmapk@yahoo.com
Journal of Hazardous Materials
|April 9, 2008
Summary
UV light and hydrogen peroxide effectively degrade Rose Bengal dye. Maximum decolorization of 90% was achieved under optimized conditions, indicating a promising method for dye removal.
Area of Science:
- Photochemistry
- Environmental Chemistry
- Dye Degradation
Background:
- Rose Bengal, an acidic dye, is widely used but poses environmental concerns.
- Wastewater treatment often requires efficient dye removal methods.
Purpose of the Study:
- To investigate the photoinduced decolorization kinetics of Rose Bengal using UV light and hydrogen peroxide.
- To optimize decolorization conditions and understand the influence of various factors.
Main Methods:
- Spectrophotometric monitoring of Rose Bengal decolorization.
- Systematic study of dye and hydrogen peroxide concentrations, pH, and additives.
- Optimization using Response Surface Methodology (RSM) and kinetic analysis.
Main Results:
- Decolorization followed pseudo-first-order kinetics.
- Optimal conditions yielded 90% decolorization with 0.005 mM Rose Bengal at 0.042 M H(2)O(2) and pH 6.6.
- Sulfite ions significantly enhanced decolorization; RSM model showed high sensitivity to experimental factors.
Conclusions:
- UV/H(2)O(2) treatment is an effective method for Rose Bengal degradation.
- A radical-initiated mechanism is proposed for the decolorization process.
- The developed RSM model accurately predicts and optimizes dye degradation.
