Disinfection By-Products in South East Queensland: Assessing Potential Effects of Transforming Disinfectants in the SEQ Water Grid
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The formation potential of disinfection by-products (DBPs) from chlorination and monochloramination of source water for South East Queensland (SEQ) drinking water was determined. Moreover, the effect on DBP formation of transforming disinfectants in the SEQ Water Grid was simulated at the bench scale. Samples were collected after coagulation and before disinfection at Molendinar, Capalaba and Mt Crosby water treatment plants (WTP). Samples were filtered at the laboratory to simulate sand filtration. Reverse osmosis permeate before disinfection was taken at Tugun desalination plant. DBPs measured were trihalomethanes (THMs), halonitromethanes (HNMs), haloacetonitriles (HANs), haloaldehydes (HAs), haloketones (HKs) and iodo-THMs (I-THMs). In general, the highest concentration of DBPs formed was observed when disinfecting source water.
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