Assessing UV- and fluorescence-based metrics as disinfection byproduct precursor surrogate parameters in a water body influenced by a heavy rainfall event

Research Article| November 22 2013 Assessing UV- and fluorescence-based metrics as disinfection byproduct precursor surrogate parameters in a water body influenced by a heavy rainfall event Ashley D. Pifer; Ashley D. Pifer 1Department of Civil Engineering, University of Arkansas, 4190 Bell, Fayetteville, AR 72701, USA Search for other works by this author on: This Site PubMed Google Scholar Sarah L. Cousins; Sarah L. Cousins 1Department of Civil Engineering, University of Arkansas, 4190 Bell, Fayetteville, AR 72701, USA Search for other works by this author on: This Site PubMed Google Scholar Julian L. Fairey Julian L. Fairey 1Department of Civil Engineering, University of Arkansas, 4190 Bell, Fayetteville, AR 72701, USA E-mail: julianf@uark.edu Search for other works by this author on: This Site PubMed Google Scholar Journal of Water Supply: Research and Technology-Aqua (2014) 63 (3): 200–211. https://doi.org/10.2166/aqua.2013.122 Article history Received: June 30 2013 Accepted: October 14 2013 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 Ashley D. Pifer, Sarah L. Cousins, Julian L. Fairey; Assessing UV- and fluorescence-based metrics as disinfection byproduct precursor surrogate parameters in a water body influenced by a heavy rainfall event. Journal of Water Supply: Research and Technology-Aqua 1 May 2014; 63 (3): 200–211. doi: https://doi.org/10.2166/aqua.2013.122 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex Although disinfection byproducts (DBPs) were discovered decades ago and surrogate parameters have been developed to track their precursors, the accuracy of these metrics in waters impacted by heavy rainfall events is largely unknown. We measured DBPs and their precursor surrogate parameters in a water body impacted by 28 cm of rain between 4/24/11 and 4/26/11. Raw waters collected from four locations within the water body from April to August 2011 were treated by coagulation and anion exchange. Ultraviolet absorbance at 254 nm (UV254) and fluorescence excitation-emission pairs (IEx/Em) were measured. Excitation-emission matrices (EEMs) were processed with parallel factor (PARAFAC) analysis, which resulted in six component fluorophore groups (C1-C6), each with a maximum intensity (FMAX). DBP formation potential (DBPFP) with free chlorine was used to assess the precursor concentrations. Chloroform (TCM) was the predominant DBP formed, and 37–63% of its precursors were removed by treatment. The trichloromethane formation potential (TCMFP)-UV254 correlation was poor (r2 = 0.25) and adversely impacted by the influx of dissolved iron from the heavy rainfall event; in contrast, correlations with fluorescence-based metrics were strong – TCMFP-I278/506 (r2 = 0.88) and TCMFP-C1 FMAX (r2 = 0.87) – illustrating the accuracy of these precursor surrogate parameters in waters impacted by a heavy rainfall event. anion exchange, chloroform, fluorescence, heavy rainfall event, natural organic matter © IWA Publishing 2014 You do not currently have access to this content.