用于水消毒的紫外线发光二极管与低压汞弧灯的比较
Comparison of ultraviolet light-emitting diodes and low-pressure mercury-arc lamps for disinfection of water.
作者信息
Sholtes Kari A, Lowe Kincaid, Walters Glenn W, Sobsey Mark D, Linden Karl G, Casanova Lisa M
机构信息
a Department of Civil, Environmental, and Architectural Engineering , University of Colorado Boulder , Boulder , CO , USA.
b Department of Environmental Sciences and Engineering, Gillings School of Global Public Health , University of North Carolina Chapel Hill , Chapel Hill , NC , USA.
出版信息
Environ Technol. 2016 Sep;37(17):2183-8. doi: 10.1080/09593330.2016.1144798. Epub 2016 Feb 22.
Ultraviolet (UV) light-emitting diodes (LEDs) emitting at 260 nm were evaluated to determine the inactivation kinetics of bacteria, viruses, and spores compared to low-pressure (LP) UV irradiation. Test microbes were Escherichia coli B, a non-enveloped virus (MS-2), and a bacterial spore (Bacillus atrophaeus). For LP UV, 4-log10 reduction doses were: E. coli B, 6.5 mJ/cm(2); MS-2, 59.3 mJ/cm(2); and B. atrophaeus, 30.0 mJ/cm(2). For UV LEDs, the 4-log10 reduction doses were E. coli B, 6.2 mJ/cm(2); MS-2, 58 mJ/cm(2); and B. atrophaeus, 18.7 mJ/cm(2). Microbial inactivation kinetics of the two UV technologies were not significantly different for E. coli B and MS-2, but were different for B. atrophaeus spores. UV LEDs at 260 nm are at least as effective for inactivating microbes in water as conventional LP UV sources and should undergo further development in treatment systems to disinfect drinking water.
对发射波长为260纳米的紫外线发光二极管（LED）进行了评估，以确定与低压（LP）紫外线照射相比，其对细菌、病毒和孢子的灭活动力学。测试微生物包括大肠杆菌B、一种无包膜病毒（MS-2）和一种细菌孢子（萎缩芽孢杆菌）。对于LP紫外线，4个对数10减少剂量分别为：大肠杆菌B，6.5毫焦/平方厘米；MS-2，59.3毫焦/平方厘米；萎缩芽孢杆菌，30.0毫焦/平方厘米。对于紫外线LED，4个对数10减少剂量分别为：大肠杆菌B，6.2毫焦/平方厘米；MS-2，58毫焦/平方厘米；萎缩芽孢杆菌，18.7毫焦/平方厘米。两种紫外线技术对大肠杆菌B和MS-2的微生物灭活动力学没有显著差异，但对萎缩芽孢杆菌孢子的灭活动力学不同。260纳米的紫外线LED在灭活水中微生物方面至少与传统的LP紫外线源一样有效，应在处理系统中进一步开发以用于饮用水消毒。
Zotero 插件