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- W2034213902 abstract "Polymeric metal coagulants are increasingly used to improve the coagulation/flocculation process efficiency, yet the research on the development of titanium and particularly polytitanium salts remains very limited. In this study, the performance of recently developed polytitanium tetrachloride (PTC) coagulant was compared with both titanium tetrachloride (TiCl4) and a commonly used coagulant, ferric chloride (FeCl3) in terms of water quality parameters and floc properties. Compared with FeCl3 coagulant, titanium-based coagulants had broader region of good flocculation in terms of pH and coagulant dose. Further, they achieved higher removal of UV254 and turbidity but lower dissolved organic carbon (DOC) removal. Charge neutralisation, physical entrapment of colloids within coagulant precipitates and adsorption were found to be the main coagulation mechanisms for TiCl4 while sweep coagulation and adsorption were found to play a more important role for both FeCl3 and PTC. The aggregated flocs formed by PTC flocculation had the largest floc size of around 836 μm with the highest floc growth rate. A little distinction of the floc strength factor was found among the coagulants tested (i.e. 44.8%, 44.2% and 38.9% for FeCl3, TiCl4 and PTC respectively) while TiCl4 coagulant yielded the flocs with the highest floc recovery factor. This study indicates that Ti-based coagulants are effective and promising coagulants for water purification. Besides, the resulted flocculated sludge can be recycled and produce functional TiO2 photocatalyst which is a significant advantage over conventional coagulants." @default.
- W2034213902 created "2016-06-24" @default.
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- W2034213902 date "2009-12-01" @default.
- W2034213902 modified "2023-10-01" @default.
- W2034213902 title "Comment on “Inhibiting the regeneration of N-nitrosodimethylamine in drinking water by UV photolysis combined with ozonation” by B. Xu, Z. Chen, F. Qi, J. Ma, F. Wu [J. Hazard. Mater. 168 (2009) 108–114]" @default.
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- W2034213902 doi "https://doi.org/10.1016/j.jhazmat.2009.06.164" @default.
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