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Study on the Inactivation of E. coli in Water by UV-LED

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Sustainable Development of Water and Environment (ICSDWE 2019)

Part of the book series: Environmental Science and Engineering ((ENVSCIENCE))

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Abstract

In this study, the effects of UV-LED on the inactivation of Escherichia coli in water were studied. The effects of turbidity, humic acid and inorganic cation on this process were examined and a preliminary analysis of the mechanism by which UV-LED inactivates E. coli was performed. Our results showed that turbidity and HA had no significant effects on E. coli inactivation under a UV radiation dose of 24.48 mJ/cm2. Cu2+ promoted UV-LED -mediated Escherichia coli inactivation while Ca2+ inhibited the process. Zn2+, Cl, CO32− and SO42− had no significant effects on the inactivation of E. coli by UV-LED . Nucleic acids released in the system indicated that the bactericidal effect of UV-LED was primarily mediated through damage to the nucleic acids.

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Acknowledgements

This research was jointly funded by Shenzhen Science and Technology Innovation Committee, China (JCYJ20160226092135176), the project of Shenzhen Institute Information Technology (PT201703), and Innovation and Enhancing College Project of Guangdong Province, China (2017GKTSCX065).

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Correspondence to Zhilin Ran .

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Ran, Z., Wang, Z., Yao, M., Li, S. (2019). Study on the Inactivation of E. coli in Water by UV-LED. In: Sun, R., Fei, L. (eds) Sustainable Development of Water and Environment. ICSDWE 2019. Environmental Science and Engineering(). Springer, Cham. https://doi.org/10.1007/978-3-030-16729-5_3

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