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Relationships between specific ultraviolet absorbance and trihalomethane precursors of different carbon sources

2008; UWA Publishing; Volume: 57; Issue: 7 Linguagem: Inglês

10.2166/aqua.2008.064

1365-2087

Alex Chow, Randy A. Dahlgren, Qian Zhang, Po Keung Wong,

Marine and coastal ecosystems

Research Article| November 01 2008 Relationships between specific ultraviolet absorbance and trihalomethane precursors of different carbon sources Alex T. Chow; Alex T. Chow 1College of Environmental Science and Engineering, South China University of Technology, University City, Guangzhou, China 510641 E-mail: atchow@ucdavis.edu; atchow@scut.edu.cn Search for other works by this author on: This Site PubMed Google Scholar Randy A. Dahlgren; Randy A. Dahlgren 2Department of Land, Air, and Water Resources, University of California, Davis CA 95616, USA Search for other works by this author on: This Site PubMed Google Scholar Qian Zhang; Qian Zhang 1College of Environmental Science and Engineering, South China University of Technology, University City, Guangzhou, China 510641 Search for other works by this author on: This Site PubMed Google Scholar P. K. Wong P. K. Wong 3Department of Biology, The Chinese University of Hong Kong, Shatin, N.T. Hong Kong China Search for other works by this author on: This Site PubMed Google Scholar Journal of Water Supply: Research and Technology-Aqua (2008) 57 (7): 471–480. https://doi.org/10.2166/aqua.2008.064 Article history Received: July 24 2007 Accepted: January 07 2008 Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Share Icon Share Facebook Twitter LinkedIn Email Tools Icon Tools Cite Icon Cite Permissions Search Site Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAll JournalsThis Journal Search Advanced Search Citation Alex T. Chow, Randy A. Dahlgren, Qian Zhang, P. K. Wong; Relationships between specific ultraviolet absorbance and trihalomethane precursors of different carbon sources. Journal of Water Supply: Research and Technology-Aqua 1 November 2008; 57 (7): 471–480. doi: https://doi.org/10.2166/aqua.2008.064 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex A rapid and effective detection method is essential for water utilities to monitor variability of dissolved organic carbon (DOC) in source waters in order to apply strategies to minimize formation of disinfection by-products in treated waters. Ultraviolet absorbance at 254 nm (UVA254) and specific UVA254 (SUVA254) have been widely used as surrogates of concentration and reactivity of DOC, respectively. However, poor correlations between SUVA254 and specific trihalomethane formation potential (STHMFP) have been occasionally reported and the reliability of using SUVA254 to predict trihalomethane (THM) formation has been questioned. In this study, the correlations of SUVA254 and THM reactivity of three different DOC sources commonly found in water treatment facilities (aquatic carbon, soil carbon, and fecal matter) were evaluated. A 0.22 μm filter, instead of 0.45 μm filter, was used for water filtration to minimize the effects of colloidal materials on UVA254. UVA254 and DOC after chlorination were also examined and differential UVA254 and SUVA254 (ΔSUVA254) were compared to THM reactivity. Results showed correlations between UVA254 and DOC were source dependent suggesting natural humification and degradation processes did not alter DOC characteristics from its original sources. The STHMFP of river and soil DOC samples were comparable, whereas their UVA254 normalized THMFP were different (p<0.05), suggesting that UVA254 is a better indicator in predicting THM formation potential than DOC concentrations. ΔSUVA254 showed a stronger correlation with STHMFP than the conventional surrogate—SUVA254. chlorination, differential UV absorbance, disinfection by-products, Sacramento-San Joaquin Delta This content is only available as a PDF. © IWA Publishing 2008 You do not currently have access to this content.