Total Internal Reflection of Deep-Ultraviolet Light in a Water Waveguide and Its Application to Water Disinfection Technologies
We propose a new disinfection technology based on a novel concept involving the use of a small, deep-ultraviolet light-emitting diode (DUV-LED); the 265-nm DUV light is coupled to a running-water stream and is guided to a distant position without diffusion due to the total internal reflection of the...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-02-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/11/2/294 |
| _version_ | 1811198795517526016 |
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| author | Takahiro Matsumoto Rika Kikojima Tomomi Fukuoka Ichiro Tatsuno Tadao Hasegawa |
| author_facet | Takahiro Matsumoto Rika Kikojima Tomomi Fukuoka Ichiro Tatsuno Tadao Hasegawa |
| author_sort | Takahiro Matsumoto |
| collection | DOAJ |
| description | We propose a new disinfection technology based on a novel concept involving the use of a small, deep-ultraviolet light-emitting diode (DUV-LED); the 265-nm DUV light is coupled to a running-water stream and is guided to a distant position without diffusion due to the total internal reflection of the DUV light inside the water stream. We demonstrate here the effect of the water waveguide disinfection technique by showing significant inactivation of a contaminated surface with indicator bacteria; this was verified by comparing the results of three disinfection methods: (i) disinfection with DUV light, (ii) disinfection with running water, and (iii) disinfection with the water-waveguide method. We believe that the marriage of the point-source nature of DUV-LED emission and the water-waveguide effect paves the way towards new applications such as water washing technologies that can reduce water consumption more than one order of magnitude without using additional chemicals in a simple manner. |
| first_indexed | 2024-04-12T01:36:07Z |
| format | Article |
| id | doaj.art-5acb37f666644b1cbd2f21315e2cbfc7 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-04-12T01:36:07Z |
| publishDate | 2019-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-5acb37f666644b1cbd2f21315e2cbfc72022-12-22T03:53:18ZengMDPI AGWater2073-44412019-02-0111229410.3390/w11020294w11020294Total Internal Reflection of Deep-Ultraviolet Light in a Water Waveguide and Its Application to Water Disinfection TechnologiesTakahiro Matsumoto0Rika Kikojima1Tomomi Fukuoka2Ichiro Tatsuno3Tadao Hasegawa4Graduate School of Design and Architecture, Nagoya City University, 2-1-10 Kita Chikusa, Nagoya 464-0083, JapanGraduate School of Design and Architecture, Nagoya City University, 2-1-10 Kita Chikusa, Nagoya 464-0083, JapanGraduate School of Design and Architecture, Nagoya City University, 2-1-10 Kita Chikusa, Nagoya 464-0083, JapanDepartment of Bacteriology, Graduate School of Medical Sciences, Nagoya City University, 1 Kawasumi, Nagoya 467-8601, JapanDepartment of Bacteriology, Graduate School of Medical Sciences, Nagoya City University, 1 Kawasumi, Nagoya 467-8601, JapanWe propose a new disinfection technology based on a novel concept involving the use of a small, deep-ultraviolet light-emitting diode (DUV-LED); the 265-nm DUV light is coupled to a running-water stream and is guided to a distant position without diffusion due to the total internal reflection of the DUV light inside the water stream. We demonstrate here the effect of the water waveguide disinfection technique by showing significant inactivation of a contaminated surface with indicator bacteria; this was verified by comparing the results of three disinfection methods: (i) disinfection with DUV light, (ii) disinfection with running water, and (iii) disinfection with the water-waveguide method. We believe that the marriage of the point-source nature of DUV-LED emission and the water-waveguide effect paves the way towards new applications such as water washing technologies that can reduce water consumption more than one order of magnitude without using additional chemicals in a simple manner.https://www.mdpi.com/2073-4441/11/2/294waterdisinfectionbacteriawaveguidedeep-ultravioletlight-emitting diode |
| spellingShingle | Takahiro Matsumoto Rika Kikojima Tomomi Fukuoka Ichiro Tatsuno Tadao Hasegawa Total Internal Reflection of Deep-Ultraviolet Light in a Water Waveguide and Its Application to Water Disinfection Technologies Water water disinfection bacteria waveguide deep-ultraviolet light-emitting diode |
| title | Total Internal Reflection of Deep-Ultraviolet Light in a Water Waveguide and Its Application to Water Disinfection Technologies |
| title_full | Total Internal Reflection of Deep-Ultraviolet Light in a Water Waveguide and Its Application to Water Disinfection Technologies |
| title_fullStr | Total Internal Reflection of Deep-Ultraviolet Light in a Water Waveguide and Its Application to Water Disinfection Technologies |
| title_full_unstemmed | Total Internal Reflection of Deep-Ultraviolet Light in a Water Waveguide and Its Application to Water Disinfection Technologies |
| title_short | Total Internal Reflection of Deep-Ultraviolet Light in a Water Waveguide and Its Application to Water Disinfection Technologies |
| title_sort | total internal reflection of deep ultraviolet light in a water waveguide and its application to water disinfection technologies |
| topic | water disinfection bacteria waveguide deep-ultraviolet light-emitting diode |
| url | https://www.mdpi.com/2073-4441/11/2/294 |
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