Snow鈥檚 CAREER Award Could Lead to New Water Treatment Technology
May 11, 2021
BATON ROUGE, LA 鈥� For the last few decades, LEDs, or light-emitting diodes, have been
in common use in light bulbs and electronics. And more recently, researchers have
made LEDs that can shine high-energy ultraviolet, or UV, rays, providing a new tool
for water treatment technologies.
海角社区 Civil and Environmental Engineering Assistant Professor Samuel Snow takes this a step further by aiming to design the first smart UV LED systems using the new UV colors available with LEDs and their ability to pulse on and off quickly. This technology would offer numerous benefits to people across the world, from cheaper and better treatment of wastewater to new handheld devices that clean drinking water in remote places.
It鈥檚 all part of Snow鈥檚 project, 鈥淎ccelerating Sustainable Water Treatment Using Smart Ultraviolet Light Emitting Diodes,鈥� which just received a National Science Foundation CAREER Award in the amount of $534,860.
鈥淢ost people will never notice when water treatment technologies improve, because it will only be a small change on water utility bills at the end of the day,鈥� Snow said. 鈥淚n effect, the technologies will make it cheaper to clean our drinking and wastewater before use or discharge. The advances do, however, provide opportunities for some new handheld technologies.
鈥淭here are already some personal-scale water treatment devices available for hikers and disaster relief which use UV technology. Our work should help us design better tools of this sort which make use of the LED advancements.鈥�
How exactly would it do that? First, the new colors of light in the UV range will allow for more control of which types of chemical oxidants are produced using UV-driven advanced oxidation processes. Snow鈥檚 project seeks to find out what water and/or wastewater conditions will benefit the most from these new oxidant choices.
Second, the ability to pulse on and off LEDs instantly is promising, because other fields, including the food safety industry, found efficiency gains when applying pulsed irradiation for disinfection.
鈥淲e want to explore why these efficiency gains exist and whether they are important
in water treatment,鈥� Snow said. 鈥淲e also think that by 
applying pulses of light, we can use high-intensity pulses while keeping the LED cool
enough to maintain better efficiency and long lifetimes.
鈥淲e believe we are some of the first鈥o look specifically at the pulsed application of UV LEDs in these research aims.鈥�
Snow added that this research will engage local middle and high school students in scientific learning activities and send college students to developing countries to test new devices during study abroad trips while training graduate students to perform cutting-edge experiments.
Like us on (@lsuengineering) or follow us on and (蔼濒蝉耻别苍驳颈苍别别谤颈苍驳).鈥�
###
Contact: Joshua Duplechain
Director of Communications