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Investigation of Dissolved Organic Matter after Oxidant Flushing of Simulated Raw Water Distribution System

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Abstract:

Oxidant flushing of the raw water distribution system (RWDS) affects the degradation of dissolved organic matter (DOM). The characteristic of DOM after chlorine (NaOCl), chlorine dioxide (ClO2) and their combination (NaOCl/ClO2) were evaluated by dissolved organic compound (DOC), spectrophotometry and fluorescence of DOM in simulated RWDS. The results suggested that oxidant flushing had negative effect on DOC removal, especially for NaOCl/ClO2, but it was resumed with a higher recovery rate compared to ClO2 and NaOCl. The biodegradable of DOM increased after oxidant flushing, and related to DOC degradaion. Overall fluorescence of DOM intensity has a decrease potential after oxidant flushing, particularly for tryptophan-like fluorescence. These results indicated that NaOCl/ClO2 has less negative impact on the resume of DOM degradation in RWDS compared with corresponding single oxidant.

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Periodical:

Applied Mechanics and Materials (Volume 700)

Pages:

515-518

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.700.515

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Online since:

December 2014

Authors:

Kun Xiang, Yan Ling Yang*, Xing Li, Da Zhang

Keywords:

Chlorine, Chlorine Dioxide, Dissolved Organic Carbon, Fluorescence, Raw Water Distribution System, Spectrophotometry

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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