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UV-C radiation based methods for aqueous metoprolol elimination.

F J Rivas¹, O Gimeno, T Borralho

¹Departamento de Ingeniería Química y Química Física, Universidad de Extremadura, Facultad de Ciencias, Edificio Jose Luis Sotelo, Avenida de Elvas S/N, 06071 Badajoz, Spain. fjrivas@unex.es

Journal of Hazardous Materials

|March 30, 2010

Summary

Advanced oxidation processes effectively degrade metoprolol, an endocrine disruptor. The photo-Fenton process achieved the highest mineralization, demonstrating its potential for water treatment.

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Area of Science:

Environmental Chemistry
Water Treatment Technologies
Advanced Oxidation Processes

Background:

Metoprolol is an endocrine-disrupting compound frequently detected in aquatic environments.
Conventional water treatment methods are often insufficient for complete metoprolol removal.
Oxidation processes are being explored for the degradation of persistent organic pollutants.

Purpose of the Study:

To investigate the efficacy of various advanced oxidation processes (AOPs) for metoprolol degradation in aqueous solution.
To compare the performance of different AOPs, including UV-C based systems and photo-Fenton.
To determine the mineralization degree achieved by each treatment system.

Main Methods:

Oxidation of metoprolol using UV-C photolysis, UV-C with hydrogen peroxide, percarbonate, monopersulfate, titanium dioxide (TiO(2)), and combinations thereof.
Application of the photo-Fenton process.
Calculation of metoprolol quantum yield.
Assessment of mineralization levels under different conditions.

Main Results:

UV-C photolysis showed a low quantum yield for metoprolol degradation.
The addition of radical promoters significantly accelerated metoprolol depletion.
Mineralization was negligible without promoters and low with peroxides or TiO(2) alone.
UV-C/H(2)O(2)/TiO(2) achieved up to 45-50% mineralization.
The photo-Fenton process yielded the highest mineralization degree (70%) under optimal conditions.

Conclusions:

Advanced oxidation processes, particularly the photo-Fenton system, are highly effective for degrading metoprolol.
Optimized photo-Fenton treatment offers a promising solution for removing metoprolol from contaminated water.
Further research into AOPs is crucial for addressing endocrine disruptors in water resources.