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Component-Based and Whole-Mixture Techniques for Addressing the Toxicity Of Drinking-Water Disinfection By-Product Mixtures
Citation:
Simmons, J E., L. K. TEUSCHLER, C. Chris Gennings, T F. Speth*, S D. Richardson, R J. Miltner*, M. G. Narotsky, AND K. M. SCHENCK. Component-Based and Whole-Mixture Techniques for Addressing the Toxicity Of Drinking-Water Disinfection By-Product Mixtures . 10.1080/152873904904, JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH - PART A: CURRENT ISSUES. Taylor and Francis, Philadelphia, PA, 68(8):741-754, (2004).
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Description:
To conduct the health-effect studies described in subsequent articles, concentrated aqueous mixtures of disinfection byproducts were required for the two separate treatment trains described in the preceding article. To accomplish this, the finished drinking waters from each treatment train were sent through cation exchange resin columns to remove hardness and free chlorine. Reverse osmosis membranes were then used to concentrate approximately 2,400 L of each water down to approximately 18L. The resulting volumetric concentration factors for the chlorinated and ozone/chlorinated waters were 136X and 124X, respectively. The concentrates were then spiked with the disinfection byproducts that were lost during the concentration effort. The results, along with the rational for choosing the method of concentration, will be presented. The data show that after the re-introduction of the lost DBPs, this methodology was able to produce a concentrate that retained a large percentage of the disinfection byproducts that were in the initial finished drinking water.
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Component-Based and Whole-Mixture Techniques for Addressing the Toxicity Of Drinking-Water Disinfection By-Product Mixtures