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Potential uses of titanium dioxide in conjunction with ultrasound for improved disinfection

Paper ID Volume ID Publish Year Pages File Format Full-Text
4159 211 2010 8 PDF Available
Title
Potential uses of titanium dioxide in conjunction with ultrasound for improved disinfection
Abstract

The inactivation of hazardous microorganisms is an important subject for water treatment. While the most widely used methods in water treatment systems are chlorination, ozonation, and ultraviolet ray irradiation, the drawbacks of these techniques surpass their efficacy. The potential formation of carcinogenic chemical byproducts has been reported as a drawback of chemical disinfection methods, hence there is a need to develop some alternate disinfection techniques. Ultrasonic (US) irradiation is well known as a useful technique for microbial inactivation due to its chemical and physical factors. Our recent studies indicated that the presence of titanium dioxide (TiO2), known as a photocatalyst, accelerates the generation of hydroxyl (OH) radicals during US irradiation, and that the process is mediated through the induction of cavitation bubbles in irradiating solutions. This review describes a disinfection method that utilizes US irradiation of contaminated solution in the presence of TiO2, a so-called “sonocatalytic disinfection” method. The significant role of OH radicals in the mechanism of cell-killing is discussed.

Keywords
Disinfection; Titanium dioxide; Ultrasonic irradiation; Hydroxyl radical; Cavitation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 48, Issue 3, 15 February 2010, Pages 416–423
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
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Full-text PDF Download
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