How Does Natural Organic Matter Removal Impact on Disinfection By-Product Formation?
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Natural organic matter (NOM) and halides (Br- and I-) present in source waters react with disinfectants to form disinfection by-products (DBPs). Current coagulation and adsorption techniques used in drinking water treatment have good NOM removal capacity, but have low halide removal capacity. This is due primarily to the presence of competing anions in solution, such as bicarbonate, and components of NOM itself. This project aims to understand the relationship between the NOM:halide ratio and specific DBP formation, since removing NOM alone in a high bromide/iodide source water may lead to high brominated/iodinated DBP formation. In addition, this work will study the effectiveness of several adsorptive techniques on NOM and halide removal under controlled conditions. This will determine the conditions that are advantageous for use in DBP precursor removal and lowering subsequent DBP formation upon disinfection.
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