In advanced oxidation processes in wastewater treatment at the laboratory level, high pressure UV Hg vapor lamps have been used. More than 50% of the energy consumption in this process is lost in the form of heat or emissions below 135 nm. UV LED lamps advantages are their high efficiency, long service life, great robustness, small size and low costs. 
In this work, the degradation efficiency of model compounds bisphenol A (BPA, an endocrine disruptor) and methylene blue (MB), was 53% and 99% respectly, and 4 min and 4 h of degradation time using 42 UVA-LED lamp (365-405 nm), a very short time compared to using UV Hg lamps.
The alternative to photochemical processes is the use of UV-LEDs whose main advantage is low energy consumption, mainly electrical and caloric, which makes them economically viable for large-scale operations such as the treatment of drinking or waste water. As a perspective, it is necessary to investigate the effect of other types of UV-LEDs on the degradation rate of model pollutants.

Diodos emisores de luz en la degradación de contaminantes

LatinXChem

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.