The objective of present study was to investigate the formation of disinfection by-products by simulated swimming pool water chlorination process under different conditions. Evaluated factors included chlorination time, chlorine dosages, pH and reaction temperature. The concentration of DCAA, TCAA and TCM increased constantly, the concentration of DCAN, TCNM and 1,1,1-TCP increased firstly and then decreased with the prolonged chlorination time. The concentration of DBPs increased significantly within 24h of chlorination reaction, and became flat after 48h. In response to increased dosage of chlorine, the concentration of DCAA, TCAA, TCM, TCNM and 1,1,1-TCP showed a tendency of increase, but the concentration of DCAN increased firstly and then decreased. The concentration of DBPs was lower when the chlorine dosage was controlled at 2mg/L; With the pH increased from 6to 8, the concentration of DCAA, TCAA, DCAN and 1,1,1-TCP initially increased and then decreased, and the concentration of TCM and TCNM increased gradually. When the pH was between 6and 7, the formation of DBPs can be effectively controlled; With the increased of reaction temperature, the concentration of DCAA, TCAA, TCM and TCNM increased continuously, while the concentration of DCAN and 1,1,1-TCP decreased gradually. Overall, the chlorination conditions of the swimming pool water should be reasonably adjusted to effectively control the generation of DBPs and ensure the comfort level of the pool.
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CUI Xiao-yu, XIN Hui-bo, SUN Xing-bin. Formation of disinfection by-products in chlorination of simulated swimming pool water. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(4): 1485-1492.
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